Shared Projects

Spacewire breakout adaptor board - one microD9 socket, one microD9 pin connector. Conforms to ESA spacewire guidance regarding inner shield handling (pin 3’s) - broken out to pin headers, not inherently connected through (may use jumper from side to side in order to connect inner shields together). Banana jack for outer shield connection to single point ground (ESD dissipation purposes)

snc98_3x4_Switch-block – you need 2x of this PCB.

This is a part of .. snc98_Slash-Number-Calculator

snc98_main_cpu with Atmega1284 (40 Pin DIL Socket).

This is a part of .. snc98_Slash-Number-Calculator

Receiver module for Optical Covert Channel experiments.

Digital version using Everlight PLR135/T9 Fiber Optic Receiver.

TBD

A RGB and audio amp for your PC Engine and friends (Core Grafx, Turbo Grafx and whatnot). Mega Drive 2 compatible video plug, RGB SCART cable should have 75Ohm resistors (and preferably also 220uF caps) which the cables should have already. Audio is also amplified a little to get higher volume, as it is a bit low from the expansion port.

• U1 3x23 Pin 2.54mm pitch header. Samtec SSQ-123-02-T-T-RA, SSW-123-02-T-T-RA (or -F-T-RA versions). As such only the left 2x3 pins and the right 3x3 pins are connected, thus any combination of plugs that covers those are adequate. 3xSSW-102-02-T-T-RA should thus also be good, or 2xSSW-103-02-T-T-RA. Note that Samtecs portfolio is huge, and there are many combinations of plugs that will work as long as they have 2.54 mm/0.100" pitch, are triple row and right angle.
• U3 MINI-DIN-9PIN (I used MDC-209 from tme.eu, but MD-90S from Mouser should be just as good)
• C1,C2,C3,C4 0.1uF 0805 MLCC SMD capacitor
• J1 1x02 Pin 2.54mm pitch connector (not necessary if you dont wanna disable the filter)
• R1,R3,R4,R5,R6,R11,R12 10K 0805 SMD resistor
• U2 THS7374 video amp
• C6,C7 2.2uF 0805 MLCC SMD capacitor
• C10,C11 1uF 0805 MLCC SMD capacitor
• R7,R8 1M 0805 SMD resistor
• R9,R10 2K7 0805 SMD resistor
• U4 TS922A opamp SOIC-8
• C5 10uF 0805 MLCC SMD capacitor
• C8,C9 10nF Film capacitor THT L7.2mm, W2.5mm, P5.00mm
• C12,C13 10uF electrolytic SMD capacitor 5x5.3
• R2 75R 0805 SMD resistor

Capacitors should be rated for 16V or higher (lower should also work, no voltages should exceed the 5V).

I recommend to 3D print one of these brackets to provide a mechanical stabilization of the card when used in PC Engine or Core Grafx: https://www.thingiverse.com/thing:3245238

I don’t have a TG16 to measure the port and make a similar for that.

Revision B of this whose sole purpose is the two notches in the side to allow for a small 3D printable case. You can find the case here

Small changes in the routing also, should make no real difference.

R 4x 1206 (SMD 1/4W 4,7K) SW1 Kodierschalter KMR 10 oder KDR 10 oder Jumper

R 4x 1206 (SMD 1/4W 4,7K) SW1 Kodierschalter KMR 10 oder KDR 10 oder Jumper

This is a simple board meant to work as an adapter for hooking an aimtrak up inside a Namco arcade gun (so it can be used with a PC with functional recoil). The board fits into the handle of the gun and contains through-holes for each connection between the aimtrak, connections in, and the solenoid in the gun. The board also includes a diode for the solenoid along with a TIP102 + Resistor for triggering the solenoid. Not much else to say, the board could use a lot of improvements but it gets the job done.

A low battery indicator board that uses two transistors and a 10k trim potentiometer to set low battery voltage. When the battery voltage is high, Q2 is active, allowing current to flow through. The current flow brings the base voltage of Q1 to 0V, with Q1 subsequently not being active and the LED is not switched on. When the voltage on the base of Q2 is lower than 0.7V (given by the output of the voltage divider on R4) Q2 is off. The current flowing through R2 thus goes only into the base of Q1. Q1’s base is now at a voltage higher than 0.7V, which activates Q1 and turns on the LED, indicating a low battery voltage.

ESK-564-110203

Tyeensy 2.0 LED Matrix Display, MAX7219 ICs, 3mm 8 x 8 Led Lattice Bright Red Dot Matrix Module 8x8 8*8

https://github.com/i-petrovski/ledmatrix