This is an update to the board that allows easy access to the 4 wire (Kelvin) connection interface of the DE-5000 LCR meter. The prior board required direct soldering to the ENIG surface, which lead to re-soldering problems. This board adds isolated VIAs(two for each channel) along with a strip of GUARD along the bottom with it’s own VIAs. Eagle brd files available at https://github.com/gclarkii/DE-5000-LCR-Meter-4-wire-slot-interface

Shrink of pyroesp’s PS1 reset Mod board, which supports in-game reset function using a controller button combination.

Kicad project for this board is available on github
Microcontroller code, original PCB project, usage, installation and programming instructions on pyroesp’s github

Features

• Small form factor of 82mm x 42mm
• Uses ESP32-WROOM-32D module
• Uses 128x64 0.96" inch OLED module
• Uses DS3231 RTC with battery backup (CR2032) for timekeeping
• Powered by 3.7V 300 mAh LiPo battery
• Uses MCP73831 for charging LiPo battery
• Uses TPS63001 Buck Boost Converter IC for efficient 3.3V power supply, with input range from 1.8V - 5.5V
• Uses TPS22919 Load switch to control power to OLED and RTC chip
• Autoselect power source, i.e., battery or USB
• USB Type-C for charging only (no data pins connected)

Github Link: https://github.com/Open-Authenticator/hardware-design

Breakouts 8-SOIC, SOT-23-6 (also SOT-23-5) and TSSOP-8. You can maybe fit others on here (like SOT-353), but I didn’t check.

Inspired by this reddit post: https://www.reddit.com/r/electronics/comments/ktahpo/diy_smd_package_breakout/

A breakout board for the ER-TFT035-6 LCD from BuyDisplay.com. The TFT is 3.5" with 320x480 resolution. It is driven by the ILI9488 chip and can be ordered with a touch screen which can be resistive or capacitive. The display can also be ordered with a matching 50 pin FPC connector (X101). This board features a space for an optional N mosfet that can be used to control the backlight (on/off/dim) as well as jumpers to define the power source as well as pull-up and current limiting resistors.

A board to produce a custom flickering effect for the 1/144 Bandai Slave One engines.

The same circuit as my 1AA Joule Thief - just smaller.

https://github.com/therealdoctorprojector/SMD-Joule-Thief

Slight tidy-ups since original release

The Camputers Lynx was a Z80 based microcomputer from the early 1980s. This is a recreation of the joystick interface created using a schematic provided by Pete Todd.

This board is used in place of a tabbed CR2025 on Game Boy games, the benefit of using this over a tabbed battery is that Chinese tabbed CR cells suck, and Panasonic Tabbed cells are expensive, with these you can use any CR2025 cell you want.

Should be compatible with most if not all GB/GBC games that use Tabbed CR2025 cells

Retainer Part Number: BK-6219-TR

Boards should be ordered with the flex option

Images: https://www.instagram.com/p/CJqJXvsDLt_/

Notes

Bend the tabs on the coin cell retainer so they put less pressure on the board.

Changelog

Revision 2

• Added planes to the top and bottom to stiffen up the board (ironic i know)

Board for diagnostic light. See www.rv-project.com/repairs/fusepanel.php for project details and BoM.

DIP16-300 to QFN16-0.65

Buzzer Board for short detector. See www.rv-project.com/repairs/fusepanel.png for build details and Bill of Materials.

Veglia Tacho Conversion

http://www.dinoplex.org/tachoconversion/

This FrSky S.Port to UART adapter is a tiny (9x7.7mm) device that allows connecting the single wire, half-duplex inverted FrSky S.Port signal to a regular, non-inverted, two wire UART.

List of components required:

• 2 * 2N7002 MOSFET in SOT-23 package
• 2 * 4.7k SMD resistor in 0603 package
• 1 * 330R SMD resistor in 0603 package
• 2 * 1x3 right-angle 2.54mm header pins (optional)

Adapter board for Razar Automatic power switch. For details and BOM see: www.rv-project.com/projects/razar2.php