Shared Projects

Bit Bang the crap out of the EEPROM on your Xbox with this module.

A basic password manager I made for a class project that uses RFID tags to recall passwords onto a 20x4 Hitachi 44780 LCD screen and is powered by an Atmega 328. Sadly I have lost most of the project files for this project as the only drive they were stored on died. If I find them again, I will upload and provide a link here.

Constant current driver for starboard

LM3886

A board for isolating a TTL serial RX / TX pair using 4N35 optoisolators.

https://github.com/pepaslabs/4N35-TTL-Serial-Optoisolator

A board for isolating a TTL serial RX / TX pair using 817 optoisolators.

https://github.com/pepaslabs/817-TTL-Serial-Optoisolator

A board for isolating a TTL serial RX / TX pair using 6N137 optoisolators.

https://github.com/pepaslabs/6N137-TTL-Serial-Optoisolator

A GPIB pass-through board with logic analyzer connectors.

A bridge to connect breadboard rails. https://github.com/pepaslabs/breadboard-helpers

A positive linear regulator for a breadboard. https://github.com/pepaslabs/breadboard-helpers

A negative linear regulator for a breadboard. https://github.com/pepaslabs/breadboard-helpers

DS18B20 temperature sensor with Wago 2059

3-up star for Cree XP-G / XP-E (and other 3.45mm LEDs). Use Aluminum MCPCB for power >1W each!! Use 2x 0Ω 0805 resistors to close the circuit.

-1.35V LDO regulator for to modify a Pentax Spotmeter 1º/21º (tested on version II). You will need two resistors: a 100kOhm and a 13.7 kOhm, both in SMD 0603 package, and a 2.2uF capacitor (though I used a 10uF because the 2.2uF was out of stock). Here is the list of components that I used:

LDO regulator - TPS72301DBVR

Tantalum cap - F381A106MMAAH1

100kOhm res - ERJ-3EKF1003V

13.7kOhm res - ERJ-3EKF1372V

Note that the PCB has pads for an input capacitor as well, but it is not needed (in fact, it is not recommended, since when I tried it the circuit was not working.) You can find some pictures of the board in the spotmeter on my blog.

This adapter can be used to connect a Black Magic Probe JTAG/SWD programmer and debugger to the legacy ARM 20Pin JTAG connector. The adapter can accept male, female connector in streight and right angle configurations. Both connectors are through hole connectors. This is an older design that was replaced by the 20Pin JTAG/SWD Adapter half SMD.

This adapter board design is part of the 1BitSquared adapter collection.

This adapter can be used to connect a Black Magic Probe JTAG/SWD programmer and debugger to a standard Dronecode UAV autopilot.

This adapter board design is part of the 1BitSquared adapter collection.

A fully assembled and ready to use adapter can be ordered from 1BitSquared US and 1BitSquared DE.

This adapter can be used to connect a Black Magic Probe JTAG/SWD programmer and debugger to a PMOD interface popular on FPGA development boards. When using an IP core with JTAG/SWD interface this adapter makes it easy to connect an ARM Cortex type Debug cable to your FPGA project.

This adapter was originally designed to interface the Black Magic Probe JTAG/SWD programmer and debugger with SiFive E310 RISC-V evaluation bitstream running on the Xilinx Arty evaluation board.

This adapter board design is part of the 1BitSquared adapter collection.