vratk0529

Hardware design and hardware hacking.

I design circuit boards and the power electronics on them, and I write whatever firmware those boards need to do their job. Most of what I build is for something that actually has to work afterwards like solar charge controllers, heating and lighting control, rack hardware, instruments for my own bench.

The other half of what I enjoy is taking hardware that was never meant to be opened and making it do something else: an automotive instrument cluster moved off its factory OS onto mainline Linux, a laptop with a dead GPU brought back at board level, a phone running an OS its manufacturer never shipped.

Contact: github.com/Vratk0529, Discord vratk0529, vratk0529@gmail.com

Selected projects

Modular smart watch, currently V6

The longest running thing here. The version number goes up when I order a complete new build, not for individual board revisions, and every one of those versions was a real hardware overhaul rather than a tidy-up.

Before any of them there was an ATmega328P, a 16x2 character display and some other parts soldered together. It worked, it was just far too impractical to actually carry around. I called it V1 at the time, which is why the early files are numbered one ahead of how I count the versions now. I think of it as V0.

V1 was the first properly complex PCB I designed. It had plenty of problems but I still used it for over a year. V2 was a disaster: I tried to make it smaller and gave no thought to how it would actually sit in a case and work, so it never did. V3 went back to V1 dimensions and worked well. V4 repeated the V2 mistake. V5 was one of the most successful ones and also lasted me over a year. V6 is what I wear now.

The big change in V6 was dropping the ESP32-S3 that every earlier version used and moving to an STM32U575. That was the right call, and it was also my first major project on an STM32. I learned a lot from it and I have used STM32s for almost everything since, where before that it was ESP32s everywhere.

V6 is four microcontrollers across a stack of boards: the STM32U575 running the watch, an STM32L031 for the LEDs, an STM32G031 for the keyboard, and an nRF52810 bridging to a phone over BLE with an Android service on the other end. The case takes swappable modules, a multimeter and a general-purpose board on a shared template.

The most recent work was redesigning the top board, the one carrying the display, RFID tag, programming ports, low power LED and IMU. I did not count that as V7 because it was not a complete overhaul. V6 has been working well for over a year and I have not found enough wrong with it to justify a new version yet.

Dual-phase MPPT solar charge controller

Two synchronous buck phases on one input and one output, interleaved 180°, switching at 100 kHz off the STM32G474's HRTIM with hardware dead-time. Peak current is caught cycle-by-cycle by an on-chip comparator wired into HRTIM's external-event input, so a fault kills the gate drive without software involved.

It has been running for over a week now as the main charger for a 3 x 400 W array into a 12 V bank. At full power each phase averages about 35 A and peaks at 50 A. I designed the board for 60 A peak per phase, but the high-side MOSFET sits at 101 C by 50 A, so that headroom is not usable as built.

The tracker took five code rewrites. The perturb-and-observe loop kept marching away from the maximum power point, and four of those attempts fixed symptoms rather than the structural fault that was muting it. Adding diode emulation for discontinuous conduction changed the plant order and set the voltage loop oscillating, which was its own problem to solve.

Car instrument cluster on mainline Linux

An i.MX6 instrument cluster out of a car, stripped of its factory OS and brought up on mainline U-Boot and Linux 6.18 so it can work as a wall dashboard. The companion MCU is desoldered, it is controlled over MQTT, and it runs a kiosk browser on the Vivante GPU through etnaviv.

Two boards and three display configurations, including a 12.3" 1920 x 720 dual-channel panel with a second screen behind an LVDS encoder, all boot one kernel, one rootfs and one U-Boot binary. Only the device tree differs.

PartDB

Shelf inventory for components, keyed by LCSC part number and backed by PostgreSQL. Every package has a shelf and a position; the system decides where a new package goes, tells me where to put it, and decrements the count when a board gets built. Slot allocation sits in the API rather than the clients, so the phone scanner, the web console and the CLI cannot disagree about where something went.

It currently holds about 30,000 components across 701 different part numbers, and there is a good deal more sitting in boxes that I have not got around to entering. The shelves are nearly full and I do not have time to expand them.

Briefcase PC

Two computers in a briefcase, one a server and one for personal use, plus a Radxa X4 and an RB2011 router, all running off a lead-acid battery backup so the whole thing keeps working when mains power goes away.

The power system is most of the work and all of it is my own boards: a pico-PSU board for each of the two computers, a battery management board, a switch board that reroutes everything from the main supply to the batteries when power fails, and a control board. They talk to each other over CAN, which is also how they get firmware updates, through a CAN bootloader I wrote for it.

I wanted this finished before university. Then I started working on other things instead, which is the usual pattern here, so it is not done. It does work as it stands, there are just features I planned that are not in it yet. I will come back to it.

STM32 audio DSP

A USB sound card and an active 2.1 crossover on one board. The STM32H743 presents itself to the host as a USB Audio Class device at 48 kHz with custom descriptors, then splits the incoming stream with 501-tap FIR filters, low-pass to the subwoofer and high-pass to left and right, using the CMSIS-DSP fixed-point routines. The output goes straight into class-D stages on the same board.

Three SAI streams run at once, two out for the speakers and the sub and one in for a microphone, so it works as a capture device as well. Volume and mute can come either from the host or from the physical pots on the board.

n6502, an 8-bit computer in VHDL

A whole small computer on a Colorlight i9+: a 6502 at 5 MHz, 16 KB each of RAM and ROM, 40 x 25 colour text on VGA with a character set you can rewrite at runtime, PS/2 keyboard, 115200 serial, four sound channels and a hardware random generator. Video, keyboard, serial and sound are all confirmed on the real board.

The testbenches measure what the hardware actually does rather than checking a register reads back what was written. The CPU passes the full Klaus Dormann functional suite, the UART is checked against an independent bit generator, and the sound channels' pitches are timed and converted back to hertz. The board's 25 MHz crystal is the pixel clock, so the VGA build needs no PLL and no vendor IP at all.

What I work with

Hardware

Hardware hacking

Firmware and software

A means to an end rather than the part I enjoy, but the boards do not work without it.

Networks and systems

Mechanical

Fusion 360 for enclosures, and a working knowledge of how to get good parts out of bad 3D printers. Tedious, but it is part of finishing a project.

About

I have just finished secondary school and start university this autumn. I studied IT there, mostly networking, but the electronics has always been the part I actually cared about, and most of it was self-taught alongside.

Nearly everything here exists because something needed to exist. The house runs on solar, so it needed a charge controller and a battery monitor. The workshop needed to know which shelf a package was on. The rack needed a CAN controller, an e-fuse and power management boards for the laptops. I also rebuild things that already exist, fairly often, because I would rather understand a thing than buy it and because I can change my own version later.

I prefer open and modifiable things, which is most of why I have run Linux everywhere since 2019.

A fair warning about the list below: I am much better at starting than at finishing. A lot of these boards were designed, ordered, assembled, brought up, and then left on the table working, but never put in a case or written up. I usually do come back to them, just six months or a year later than I meant to. So the index is honest rather than flattering: it shows what got designed, and separately what actually got made.

281 board designs (104 in KiCad, 177 in EasyEDA before that), 49 firmware projects, 115 fabrication orders placed since February 2020.

Index

Everything on disk. "Made" is taken from my JLCPCB order history, so a board ordered somewhere else, or uploaded under a different file name, will show as not made. 48 orders from the EasyEDA years cannot be matched to a project name at all, which is why those rows show a question mark rather than a no.

356 of 356 shown
Name Type Family Detail Made Date
Node overnight parkingSystemsHomelabIncus + rtcwake S3 suspend and restore2026-08-28
Car instrument clusterSystemsDisplaysi.MX6 - mainline 6.18 + Buildroot, was QNX2026-08-27
Soldering-station TUISystemsWorkshopPython curses, autostart BOM picker2026-08-24
teplomerySoftwareHome automationRust - 16 sensors, table-driven2026-08-23
hacoreSoftwareHome automationRust - MQTT, InfluxDB, HA dashboard, SQLite2026-08-23
PartDBSoftwareWorkshopPostgreSQL inventory - API, CLI, web, Android2026-08-22
n6502FPGAn6502XC7A50T - 6502 SoC, VGA, PS/2, UART, sound2026-08-21
Audio SBCSystemsHouse ampSTM32MP157 SBC - Buildroot, CamillaDSP, Snapcast2026-08-19
lightsSoftwareHome automationRust, on hacore2026-08-13
pv-controlSoftwareHome automationRust, on hacore2026-08-12
Proper-MPPTFirmwareMPPTSTM32G474VET6 - HRTIM, COMP, FDCAN, VE.Direct2026-08-12
AC detector HDO sensor V1.0BoardSmart homeno2026-08-10
Smart watch (main)FirmwareSmart watchSTM32U575VGT6 - scheduler, modules, HMAC2026-08-06
Smart watch keyboard controllerFirmwareSmart watchSTM32G031G8U62026-08-05
nRF52810 BLE bridgeFirmwareSmart watchFramed full-duplex SPI with sequence numbers2026-08-04
Smart watch LED MCUFirmwareSmart watchSTM32L031G6U62026-08-04
Android notification bridgeSoftwareSmart watchKotlin - phone-side BLE service2026-08-04
KRH flight controllerFirmwareDroneSTM32H743 - 1 kHz gyro, Mahony attitude, PID2026-08-03
Middle board V1.1BoardSmart watchWatch V6yes 2025-06-182026-07-30
Top board V2.0BoardSmart watchWatch V6yes 2026-06-252026-07-18
Power stage V1.0BoardMPPTMPPTyes 2026-06-152026-07-03
Control board V1.0BoardMPPTMPPTyes 2026-06-152026-07-03
CAN controllerBoardRackyes 2026-06-032026-06-29
CAN bootloader testFirmwareToolsSTM32F405RG target2026-06-29
CAN bootloaderFirmwareToolsField update over CAN2026-06-29
Input board V1.0BoardMPPTMPPT, planned front endno2026-06-27
Phone (Evolution X)SystemsDevicesEvolution X on Redmi Note 11 Pro2026-06-24
SBC interposerBoardRackHouse ampyes 2026-06-042026-06-19
8-channel ampBoardRackHouse ampyes 2026-06-042026-06-19
SATA powerBoardRackno2026-06-14
Power eFuseBoardRackno2026-06-07
Overvoltage protectionBoardRackno2026-06-06
Laptop controllerBoardRackyes 2026-06-032026-06-06
24 V distributionBoardRackno2026-06-05
Amp controllerFirmwareAudioESP82662026-05-20
Power LED light V1.0BoardSmart homeno2026-05-11
Large digital clockFirmwareSmart homeESP32-S32026-05-10
CAN trace decoderSoftwareInstrumentsPython2026-05-09
STM32MP157 test V1.1BoardRackno2026-04-25
PicoPSUFirmwareBriefcase PCSTM32F412RE2026-04-22
cangaroo (fork)SoftwareInstrumentsQt CAN bus analyser2026-04-21
BatteryBoardFirmwareBriefcase PCSTM32F412RE2026-04-07
SwitchBoardFirmwareBriefcase PCSTM32F412RE2026-04-04
SwitchBoard V1.1BoardBriefcase PCBriefcase PCyes 2026-03-162026-04-03
PicoPSU V1.0BoardBriefcase PCBriefcase PCyes 2026-03-162026-04-03
BatteryBoard V1.0BoardBriefcase PCBriefcase PCyes 2026-03-162026-04-03
STM32MP157 test V1.0BoardRackno2026-03-31
HV buck module V1BoardBattpackno2026-03-29
STM32 DSP V2.0BoardAudiono2026-03-28
PSU templateBoardBattpackno2026-03-28
Kelvin measurement boardBoardCompetitionno2026-03-25
Ceramic substrate board 2BoardCompetitionno2026-03-25
Ceramic substrate board 1BoardCompetitionno2026-03-25
Competition tester A10 (2026)BoardCompetitionno2026-03-24
Briefcase PC templateBoardBriefcase PCno2026-02-22
ScopeDisplayFirmwareInstrumentsESP322026-02-21
SwitchBoard V1.0BoardBriefcase PCBriefcase PCno2026-02-17
Mini-PC controllerFirmwareMini-PCSTM32F411CE2026-02-09
Remote 3FirmwareSmart homeESP32-C32026-02-08
Drone ESP32FirmwareDroneESP322026-02-05
Window openerFirmwareSmart homeESP32-C32026-02-02
Motor driver 02BoardMotor driveno2026-01-31
MPPT V3 POWERBoardSmart homeno2026-01-31
Motor driver 01BoardMotor driveno2026-01-30
STM32 DSP V1.0BoardAudioyes 2025-12-282026-01-28
Multimeter V3.0 PCB1BoardSmart watchWatch moduleno2026-01-28
Drone V4.0BoardDroneyes 2025-12-262026-01-23
CH572D bring-upFirmwareBring-upWCH RISC-V2026-01-20
CH32V003 bring-upFirmwareBring-upWCH RISC-V2026-01-19
Audio DSP V1.0FirmwareAudioSTM32H7432026-01-18
STM32H743VIT6 bring-upFirmwareBring-upWeAct H7432026-01-16
General use module V2.0BoardSmart watchWatch moduleyes 2025-12-232026-01-09
Multimeter V3.0 PCB2BoardSmart watchWatch moduleno2026-01-06
STM32H723VGT bring-upFirmwareBring-upWeAct H7232025-12-30
Module templateBoardSmart watchWatch moduleno2025-12-29
General use module V1.0BoardSmart watchWatch moduleyes 2025-12-042025-12-23
Glasses hub V1.0BoardMini-PCyes 2025-12-202025-12-20
Mini PC V2.0BoardMini-PCyes 2025-12-182025-12-18
MIPI to USBC V1BoardMini-PCno2025-12-18
Practice board (2025)BoardCompetitionno2025-11-20
Competition board A4 (2025)BoardCompetitionno2025-11-20
Furnace controller V4BoardSmart homeno2025-11-15
Small V1BoardMini-PCno2025-11-13
KORA ground stationFirmwareKORASTM32F4072025-11-01
KORA flight computerFirmwareKORASTM32F407 - RadioLib, BNO055, SPL062025-11-01
IMU testFirmwareDroneSTM32F407VET62025-10-24
Competition board, school stage (2025)BoardCompetitionno2025-10-22
Photovoltaic controllerFirmwareSmart homeSTM32F411CE2025-10-14
IMU 2.0BoardDroneyes 2025-10-042025-10-04
VHDL HDMI outFPGAVideoHDMI transmitter experiments2025-10-02
HDMI / VGA experimentsFPGAVideoColorlight boards2025-10-02
xvcd for CH347FPGAToolsXilinx virtual cable over CH347 JTAG2025-09-30
Boiling controllerFirmwareSmart homeSTM32F411CE2025-09-22
Miltimeter V1.0BoardInstrumentsno2025-09-13
Smart watch (rewrite)FirmwareSmart watchSTM32U575VGT62025-09-07
Victron device controllerFirmwareSmart homeESP32-S2 - VE.Direct2025-09-06
STM UART controllerFirmwareToolsSTM32G030F62025-09-06
Photovoltaic controll board V1.0BoardSmart homeyes 2025-08-192025-09-05
Hand controller V1.0BoardVRno2025-09-01
Mini thermometer V2.0BoardSmart homeno2025-08-29
LoRa Gateway V1.0BoardSmart homeyes 2025-08-032025-08-24
Simple LoRa gatewayFirmwareRFESP32-S22025-08-21
Furnace controller v2FirmwareSmart homeESP32-S22025-08-21
PV system controllerFirmwareSmart homeSTM32F411CE2025-08-10
Mini PC V1.0BoardMini-PCMini PC V1yes 2025-07-242025-07-24
Radxa X4 / RPi testFirmwareBring-upRP20402025-07-22
IMUBoardDroneyes 2025-07-172025-07-22
RP2040 testFirmwareBring-upRP20402025-07-11
MPPT data processingSoftwareMPPTPython analysis of tracker logs2025-07-11
Mini PC V1.0 Battery boardBoardMini-PCMini PC V1yes 2025-07-072025-07-09
Ring controller V2.2BoardRing controllerno2025-06-27
Ring controller V2.1BoardRing controlleryes 2024-07-162025-06-24
Top board V1.1BoardSmart watchWatch V6yes 2025-06-182025-06-18
LED board V1.1BoardSmart watchWatch V6yes 2025-06-182025-06-18
Smart home dashboardSoftwareHome automationPython service and web UI2025-06-09
USBLoRa V1.0BoardRFno2025-05-24
Power distribution board V3.0Boardpower distribution boardno2025-05-17
Top board V1BoardSmart watchWatch V6no2025-05-10
STM32U575VGTx bring-upFirmwareBring-upCustom variant2025-05-10
Middle board V1BoardSmart watchWatch V6no2025-05-10
LED board V1BoardSmart watchWatch V6no2025-05-10
Laptop with broken GPUSystemsRepairBoard-level diagnosis, coreboot2025-05-09
Custom FIDO keySystemsDevicespico-fido on ESP32-S32025-05-09
STM32F407VET6 bring-upFirmwareBring-up2025-05-08
Drone V3.0BoardDroneyes 2025-04-152025-05-07
CRT terminalFirmwareDisplaysSTM32F411CE2025-05-04
UART+STLINK breakout for uni progBoardBreakoutsyes 2025-04-272025-04-27
Power distribution board V2.0Boardpower distribution boardyes 2025-04-272025-04-27
Battery meterFirmwareSmart homeSTM32F103C82025-04-27
Shelf labelsSoftwareWorkshopGenerated PDF labels2025-04-25
Uni prog v1.0BoardToolsyes 2025-04-062025-04-23
Mechanical calculator V1FirmwareCuriositiesESP32-S32025-04-21
Mechanical calculator serverSoftwareCuriositiesPython API2025-04-19
Drone joystick / PID tunerSoftwareDroneUDP PID tuning UI2025-04-17
Pump controller V1BoardSmart homeyes 2025-04-122025-04-12
Battery thermometer V1.0BoardSmart homeyes 2025-04-112025-04-11
dapbootSystemsToolsDFU bootloader for STM322025-03-23
STM32F411CEU6 bring-upFirmwareBring-up2025-03-23
Black Magic ProbeSystemsToolsDebug probe firmware2025-03-23
MPPT controller (v1)FirmwareMPPTSTM32G431CB, custom variant2025-03-21
Competition board (2025)BoardCompetitionno2025-03-19
Thermometer (small)FirmwareSmart homeESP8266 D1 mini2025-03-12
Light switchFirmwareSmart homeESP82662025-03-12
LED strip controllerFirmwareSmart homeESP82662025-03-12
Thermometer clock v2.1FirmwareSmart homeESP32-C32025-03-11
12 V light controller V1FirmwareSmart homeESP32-S22025-03-09
STM32G431CB bring-upFirmwareBring-up2025-03-07
MPPT ALU V2.0BoardSmart homeyes 2025-02-252025-02-26
MPPT controller V2.0BoardSmart homeno2025-02-25
Drone V2.1BoardDroneyes 2024-07-162025-02-14
Thermometer clock V2.1BoardSmart homeyes 2025-01-172025-01-31
Furnace controller V3BoardSmart homeyes 2024-07-102025-01-19
UPS V1.0BoardPowerno2025-01-12
Power meter V1.0BoardSmart homeno2025-01-12
AMP V4.0BoardAudiono2024-12-30
DSP board V1BoardAudiono2024-12-26
Thermometer clock V2.0BoardSmart homeno2024-12-19
Thermometer clock V1.0BoardSmart homeyes 2024-11-292024-12-19
LoRa filterBoardDroneyes 2024-12-012024-11-15
CH1116BoardBreakoutsyes 2024-11-052024-11-05
Competition board (2024)BoardCompetitionno2024-10-16
EMI demonstrationBoardTeachingno2024-09-03
Battery monitor V2.0BoardSmart homeno2024-09-03
Solar controller V1.0BoardSmart homeyes 2024-08-182024-08-18
Battery monitor V1.0BoardSmart homeyes 2024-08-182024-08-18
The clock V2BoardSmart homeyes 2024-08-052024-08-05
Peltier unit V2BoardThermalno2024-07-20
High power boost regulator V1BoardSmart homeno2024-07-11
Ring controller V2BoardRing controllerno2024-06-28
USB PD Charger V1.0BoardSmart homeyes 2024-06-232024-06-23
Ring controller V1.1BoardRing controlleryes 2024-05-182024-06-07
Light switch V2.0BoardSmart homeno2024-05-23
USB PD Trigger V1BoardPoweryes 2024-05-182024-05-18
Drone V2 MainBoardDroneno2024-05-14
Pocket router V1.0BoardSmart homeno2024-05-09
Ring controller V1BoardRing controllerno2024-04-28
Geiger counter moduleBoardSmart watchWatch moduleno2024-03-12
Voltmeter V2BoardSmart watchWatch V5 addonyes 2024-03-052024-03-05
HV PSUBoardPowerno2024-03-02
ZosilovačBoard (EasyEDA)EasyEDA era?
Voice changerBoard (EasyEDA)EasyEDA era?
Variable power supplyBoard (EasyEDA)EasyEDA era?
Valve controller + DS18B20Board (EasyEDA)EasyEDA era?
V_A transistorBoard (EasyEDA)EasyEDA era?
Usb-switch-ethernetBoard (EasyEDA)EasyEDA era?
Upd-stuffBoard (EasyEDA)EasyEDA era?
Universal-charger-v1Board (EasyEDA)EasyEDA era?
Universal-buck-current-limit-01Board (EasyEDA)EasyEDA era?
USB-amp-v1Board (EasyEDA)EasyEDA era?
USB-amp-fixedBoard (EasyEDA)EasyEDA era?
USB-amp-USB3.1Board (EasyEDA)EasyEDA era?
USB-amp-6chBoard (EasyEDA)EasyEDA era?
USB-amp V2Board (EasyEDA)EasyEDA erayes 2024-04-14
UNI-REGBoard (EasyEDA)EasyEDA era?
Top board v2Board (EasyEDA)EasyEDA era?
Top boardBoard (EasyEDA)EasyEDA erayes 2023-09-15
Tolerance testBoard (EasyEDA)EasyEDA era?
Thermometer-smallBoard (EasyEDA)EasyEDA era?
The watchBoard (EasyEDA)EasyEDA era?
TestpcbBoard (EasyEDA)EasyEDA era?
Test-high-gain-_amp_Board (EasyEDA)EasyEDA era?
Temp-probeBoard (EasyEDA)EasyEDA era?
Temp-plate circular newBoard (EasyEDA)EasyEDA era?
Temp-plate circularBoard (EasyEDA)EasyEDA era?
Temp-plateBoard (EasyEDA)EasyEDA era?
Temp-controllBoard (EasyEDA)EasyEDA era?
Telephone-wireless-addonBoard (EasyEDA)EasyEDA era?
Tank ControllerBoard (EasyEDA)EasyEDA era?
Stirrer moduleBoard (EasyEDA)EasyEDA era?
Sound cart usbBoard (EasyEDA)EasyEDA era?
Smart-watch-v5Board (EasyEDA)EasyEDA erayes 2023-09-15
Smart-watch-v4.5Board (EasyEDA)EasyEDA era?
Smart-watch-v4.2 - E-paperBoard (EasyEDA)EasyEDA era?
Smart-watch-v4.1 - E-paperBoard (EasyEDA)EasyEDA era?
Smart-watch-v4Board (EasyEDA)EasyEDA era?
Smart-watch-v3.1Board (EasyEDA)EasyEDA era?
Smart-watch-v3Board (EasyEDA)EasyEDA era?
Smart-watch-v2.5Board (EasyEDA)EasyEDA era?
Smart-watch-v2.1Board (EasyEDA)EasyEDA era?
Smart-watch-v2.0Board (EasyEDA)EasyEDA era?
Smart-light-v2-12V onlyBoard (EasyEDA)EasyEDA erayes 2023-11-04
Smart-glove-v1.2Board (EasyEDA)EasyEDA era?
Smart-glove-v1.1Board (EasyEDA)EasyEDA era?
Smart-glove-v1Board (EasyEDA)EasyEDA era?
Smart switchBoard (EasyEDA)EasyEDA era?
Smart glasses keyboardBoard (EasyEDA)EasyEDA era?
Simple-3s-chargerBoard (EasyEDA)EasyEDA era?
Simple solar testBoard (EasyEDA)EasyEDA era?
Sim-testBoard (EasyEDA)EasyEDA era?
Sht45-breakoutBoard (EasyEDA)EasyEDA era?
Serial to USB adapterBoard (EasyEDA)EasyEDA era?
Scooter-speed-controller-v1Board (EasyEDA)EasyEDA era?
SW-chargerBoard (EasyEDA)EasyEDA era?
SW mini V2Board (EasyEDA)EasyEDA era?
SW mini V1Board (EasyEDA)EasyEDA erayes 2023-12-29
Rubber ducky v3Board (EasyEDA)EasyEDA erayes 2023-09-18
Rubber ducky v2Board (EasyEDA)EasyEDA era?
Rubber duckyBoard (EasyEDA)EasyEDA era?
Resistor dual psuBoard (EasyEDA)EasyEDA era?
Resistor dacBoard (EasyEDA)EasyEDA era?
Remote v3Board (EasyEDA)EasyEDA era?
Remote v2Board (EasyEDA)EasyEDA era?
Recuperator, servo motor, large fan controllerBoard (EasyEDA)EasyEDA era?
ReceiverBoard (EasyEDA)EasyEDA era?
RGB-cool-glassesBoard (EasyEDA)EasyEDA era?
RF_powerBoard (EasyEDA)EasyEDA era?
RF-AMPBoard (EasyEDA)EasyEDA era?
R2r ladderBoard (EasyEDA)EasyEDA era?
Precision-voltmeter-addon-SW V2Board (EasyEDA)EasyEDA era?
Precision-voltmeter-addon-SWBoard (EasyEDA)EasyEDA erayes 2023-12-03
Precision ADCBoard (EasyEDA)EasyEDA era?
PreAMPBoard (EasyEDA)EasyEDA era?
Pre-ampBoard (EasyEDA)EasyEDA era?
PowerSupplyBoard (EasyEDA)EasyEDA era?
Power-supply-SF1530Board (EasyEDA)EasyEDA era?
Power-buck-boost-solar-1.2Board (EasyEDA)EasyEDA erayes 2023-11-22
Power-buck-boost-solarBoard (EasyEDA)EasyEDA era?
Power-amp-controllBoard (EasyEDA)EasyEDA era?
Power meter _ energy meterBoard (EasyEDA)EasyEDA era?
Power buck converter but betterBoard (EasyEDA)EasyEDA era?
Power buck converterBoard (EasyEDA)EasyEDA era?
Power ampBoard (EasyEDA)EasyEDA era?
Portable-power-supplyBoard (EasyEDA)EasyEDA era?
Phone user v2Board (EasyEDA)EasyEDA era?
Phone userBoard (EasyEDA)EasyEDA era?
Phone data transmitterBoard (EasyEDA)EasyEDA era?
Peltier-moduleBoard (EasyEDA)EasyEDA era?
POTS SimulatorBoard (EasyEDA)EasyEDA era?
PN532Board (EasyEDA)EasyEDA era?
PCB-heaterBoard (EasyEDA)EasyEDA era?
Multimeter v2.0 sim testBoard (EasyEDA)EasyEDA era?
Multimeter v2.0Board (EasyEDA)EasyEDA era?
Motor-controller-v01Board (EasyEDA)EasyEDA era?
Motor driverBoard (EasyEDA)EasyEDA era?
Modules-testBoard (EasyEDA)EasyEDA era?
MobilBoard (EasyEDA)EasyEDA era?
Mini VGA adapterBoard (EasyEDA)EasyEDA era?
Mechanical calculatorBoard (EasyEDA)EasyEDA erayes 2023-11-25
Macro keyboardBoard (EasyEDA)EasyEDA era?
MB01Board (EasyEDA)EasyEDA era?
LoRa+GPS-module testBoard (EasyEDA)EasyEDA era?
Linear-motor-driverBoard (EasyEDA)EasyEDA erayes 2024-02-21
Light controller programmerBoard (EasyEDA)EasyEDA era?
Light contorller working TRIACBoard (EasyEDA)EasyEDA era?
Light contorller workingBoard (EasyEDA)EasyEDA era?
Light contorllerBoard (EasyEDA)EasyEDA era?
Led boardBoard (EasyEDA)EasyEDA era?
Laptop addon v1Board (EasyEDA)EasyEDA era?
LV Invertor for solarBoard (EasyEDA)EasyEDA era?
Joystick-nahradaBoard (EasyEDA)EasyEDA era?
Joystick-addonBoard (EasyEDA)EasyEDA era?
Joystick v0.1Board (EasyEDA)EasyEDA era?
Joystick buttonBoard (EasyEDA)EasyEDA era?
Isa prototyping boardBoard (EasyEDA)EasyEDA era?
Idk-what-this-isBoard (EasyEDA)EasyEDA era?
House-amp-practicalBoard (EasyEDA)EasyEDA era?
HockBoard (EasyEDA)EasyEDA era?
Halfbridge-testBoard (EasyEDA)EasyEDA era?
Half-bridgeBoard (EasyEDA)EasyEDA era?
HRPT LNABoard (EasyEDA)EasyEDA era?
Good-voltmeterBoard (EasyEDA)EasyEDA era?
Good-PSU+VoltmeterBoard (EasyEDA)EasyEDA era?
Good-PSUBoard (EasyEDA)EasyEDA era?
Furnace controller V2Board (EasyEDA)EasyEDA era?
Furnace controllerBoard (EasyEDA)EasyEDA era?
FullbridgeBoard (EasyEDA)EasyEDA era?
Esp32 mainBoard (EasyEDA)EasyEDA era?
E28-2G4M27S breakoutBoard (EasyEDA)EasyEDA erayes 2023-09-15
Drone-ovladanieBoard (EasyEDA)EasyEDA erayes 2024-01-21
Drone-main-board-v1Board (EasyEDA)EasyEDA erayes 2024-01-21
Drone-controller-01Board (EasyEDA)EasyEDA era?
Domcek-elektroBoard (EasyEDA)EasyEDA era?
Domcek v.2Board (EasyEDA)EasyEDA era?
Dishwasher-controllerBoard (EasyEDA)EasyEDA era?
Digital-clock+temp-displayBoard (EasyEDA)EasyEDA erayes 2023-10-26
Digestor-riadenie V1.1Board (EasyEDA)EasyEDA era?
Digestor-riadenieBoard (EasyEDA)EasyEDA era?
Development boardBoard (EasyEDA)EasyEDA era?
Desk-moduleBoard (EasyEDA)EasyEDA era?
Datalogger-temp-controller-fullbridgeBoard (EasyEDA)EasyEDA era?
Datalogger-temp-controller v9Board (EasyEDA)EasyEDA era?
Datalogger-temp-controller v8Board (EasyEDA)EasyEDA era?
Datalogger-temp-controller v7Board (EasyEDA)EasyEDA era?
Datalogger-temp-controller v6Board (EasyEDA)EasyEDA era?
Datalogger-temp-controller v5Board (EasyEDA)EasyEDA era?
Datalogger-temp-controllerBoard (EasyEDA)EasyEDA era?
DataloggerBoard (EasyEDA)EasyEDA era?
Cup-thermometer v1.1Board (EasyEDA)EasyEDA erayes 2024-04-21
Cup-thermometerBoard (EasyEDA)EasyEDA era?
Circle schematicBoard (EasyEDA)EasyEDA era?
Chaldnicka-shemaBoard (EasyEDA)EasyEDA era?
Car-ctrlBoard (EasyEDA)EasyEDA era?
Calculator v1Board (EasyEDA)EasyEDA era?
CFL replacement lightsBoard (EasyEDA)EasyEDA era?
CC1310 dev-boardBoard (EasyEDA)EasyEDA era?
Bt-moduleBoard (EasyEDA)EasyEDA era?
Bottom board V2Board (EasyEDA)EasyEDA era?
Bottom boardBoard (EasyEDA)EasyEDA erayes 2023-09-15
BootburnerBoard (EasyEDA)EasyEDA era?
Boat boardBoard (EasyEDA)EasyEDA era?
Blank ESP8266Board (EasyEDA)EasyEDA era?
Better-light-switch-but-even-betterBoard (EasyEDA)EasyEDA era?
Better-light-switchBoard (EasyEDA)EasyEDA era?
Better 3s battery chargerBoard (EasyEDA)EasyEDA era?
BbbbbBoard (EasyEDA)EasyEDA era?
Backup-battery-managmentBoard (EasyEDA)EasyEDA era?
Audio_MixerBoard (EasyEDA)EasyEDA era?
Audio ampBoard (EasyEDA)EasyEDA era?
Arm test 001Board (EasyEDA)EasyEDA era?
Arduino_relayBoard (EasyEDA)EasyEDA era?
Antenna-testBoard (EasyEDA)EasyEDA erayes 2024-02-17
90V power supplyBoard (EasyEDA)EasyEDA era?
3s-battery-charger-repairBoard (EasyEDA)EasyEDA era?
12v to 3.3v 5vBoard (EasyEDA)EasyEDA era?
12_24_48V to 325VBoard (EasyEDA)EasyEDA era?
12V-distribution-panelBoard (EasyEDA)EasyEDA era?

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