2 layers
ESP32Anglerfish
Matchboxscope/Matchboxscope
ESP32-based mini microscope for fluidic device observation
7 parts103
Boards using the BD139
104 boardsBoards in 80 GitHub repositories, designed in KiCad, that use the BD139 by STMicroelectronics (-65℃~+150℃ 1 NPN 1.5A 10uA 12.5W 500mV 5V 63 80V NPN TO-126 Bipolar (BJT) ROHS). See how each wires it, with its parts, size, README and files; the BD139’s symbol, footprint and pinout are on its own page.
- 2 layers49.8 × 63 mm
- 2 layers100 × 100 mm
- 2 layers84.5 × 82.6 mm
- 2 layers100 × 79 mm
- 2 layers95.9 × 112.6 mm
- 2 layers40 × 99 mm
- 2 layers135.8 × 56.1 mm
Power board
xtarke/automated_buggy
This shield connects microcontroller (MSP-EXP430FR2355) pins to the car's power board. Go to Power Board for more hardware information.
87 parts5GPL-3.0 - 2 layers230.1 × 118.5 mm
POWER 0-50
Aleksei327/STM32G474-Precision-Lab-Power-Supply
Precision 0–50 V programmable laboratory PSU with 1 mV/1 mA setting steps, hybrid synchronous-buck + linear regulation, STM32G474 control, INA228 metering, and layered hardware protection.
207 parts4 - 2 layers101.3 × 102.4 mm
Opamp front
prydin/opamp-frontend-class-ab
The result is a fast amplifier (>80V/us slew rate) with low distortion (0.00045% meadured @ 1kHz/1W/8ohm resistive load). It's undergone some preliminary measurements and looks quite promising.
93 parts4 - 2 layers50 × 100 mm
- 2 layers90 × 40 mm
- 2 layers
AUTO CUT OFF CHARGER
arhamjaffer/auto-cutoff-battery-charger
PCB-based charging circuit with automatic cut-off; optimized for safe long-term operation
17 parts2 - 2 layers68.6 × 53.3 mm
- 2 layers120.1 × 120 mm
Mono amplifier
dario0603/AB-class-amplifier
Design and simulation of a Class-AB audio power amplifier, focusing on output-stage linearity, crossover distortion reduction, and overcurrent protection.
97 parts1 - 2 layers87.6 × 79.4 mm
Tempcontrolfan
hemilth2257/Temperature-Controlled-DC-Fan
Temperature Controlled DC fan built with an Arduino Nano, LM358 op-amp, and a custom KiCad PCB
20 parts1 - 2 layers161.2 × 29.5 mm
- 2 layers73 × 35.6 mm
Twilight switch
joseguerra3000/twilight-switch
System able to control a relee to turn on or off exterior lights depending on the lighting.
24 parts1 - 2 layers84.8 × 76.3 mm
LabPS
loowiz/EDA_LabPS
This is a power supply project based on the chinese DIY kit "0-30V 2mA-3A Adjustable DC Regulated Power Supply".
57 parts1GPL-3.0 - 4 layers150.3 × 132.3 mm
- 2 layers111.1 × 44.5 mm
1KVA Power Supply
Ogbonna-Joseph/1KVA-SINE-WAVE-POWER-INVERTER
This is a design of a sine wave power inverter, which can be used in your homes and offices.
33 parts1 - 2 layers113.5 × 152.5 mm
- 2 layers76.5 × 66.3 mm
- 2 layers
