Shared Projects

13 pin Molex breakout board designed specifically for Bally’s / Williams style coin doors with coin button LEDs. Designed for mechanical and virtual pinball machines, or other arcade machines that utilize this coin door that would require a retrofit solution for old or DIY projects. Allows interconnectivity with inputs and lamps from the coin door to a microcontroller (arduino, KL25Z input / output board, Teensy, etc.), without having to solder, cut, or modify the factory Molex connector or it’s wiring.

Board is designed to use 0.1 pitch 2X7 pin header. Power can be supplied via header, or screw terminal. Board isolates lamp power for use with 6.3v incandescent or 5v LED lamps, separate from input/output logic from microcontrollers that may use different logic voltages. The use of a jumper on pins 1 & 3 will tie grounds together if using a 5v power source for both LEDs and Microcontroller logic.

WARNING: board does NOT have reverse polarity protection.

Requires the following: 1 26-60-4130 Molex (13 pin through hole) Terminal Block - 2-pin 3.5mm 0.1 pin headers (2x7)

A project for a wifi adapter for a Softub that sits between the top unit and temperature probe, and the stock Softub control board.

Boost guitar pedal PCB, single transistor, single knob boost. For adding volume, grit, or pushing an amp a little harder.

WS2812 only

Requires Teensy 4.1 and SN74HCT245DIL20

This is a simple correction board for consumer-level RGB on the v1 MiSTercade HD15 port. This will negate the need for the add-on XL board, which I found to be unnecessary for me. The series resistors create a voltage divider, utilizing the 75ohm terminations, on the input side of the monitor. This will effectively lower the voltage to expected level ranges for the majority of equipment, and carry Csync on the H sync line, if enabled. You may float V sync or jumper it, with a clipped resistor leg. It has been recommended that V sync float if using csync, but I have not tested this. GunCon support added at the H sync pin, pre-resistor.

BOM are basic components for any skill level. ¼ Watt resistors: 270 ohm (x3) for RGB; 680 ohm (x1) H sync line if Csync; RCA jack (x1) for Lightgun; HD15 ports (x2).

LEDs for a small ceramic Christmas tree.

https://gitlab.com/XenGi/darling

ATtiny10 micro Christmas tree. https://www.shermluge.com/electronics/attiny10/attiny10-christmas-tree

4.2 is current version.

Ring modulator derrived from Randofo’s Instructable: https://www.instructables.com/Ring-Modulator-Pedal/ see that for BOM

A panel for a 6hp passive eurorack attenuator in 1U (IJ format).

The panel can be used without a component pcb (just add the pot and jacks and solder on the back using wires), but it works best with the corresponding component PCB: “Passive Attenuator for Eurorack (6hp, 1U, IJ format) - PCB VERSION A”

Alternative version: markings now cover 300 degrees.

A panel for a 6hp passive eurorack attenuator in 1U (IJ format).

The panel can be used without a component pcb (just add the pot and jacks and solder on the back using wires), but it works best with the corresponding component PCB: “passive Attenuator for Eurorack (6hp, 1U, IJ format) - PCB VERSION B”

This is an updated version of the previous design, the markings are now covering 300 degrees. The back has an alternative design, the panel is symmetric.

Modutrak Searchlight Base 2.1

PCM510xA I2S Stereo DAC – An I2S stereo audio DAC with an internal master clock PLL and a charge pump for direct-coupled ground-centered audio output. Bill of Materials

STM32G0 prototyping board