Shared Projects

Single ended BNC to double ended signal duplicated to each pair of RJ45 connector. Uses a common amplifier pinout, designed with THP210 in soic-8 package.

Charge sensitive amplifier using soic package with most common pinout. External protective diodes on input and protective capacitors on input and output for ESD protection to amplifier and output. Input on inverting input and offset adjustment on non-inverting input.

The most accurate reproduction of the AGB-E05-01 Game Boy Advance Cartridge PCB, without any restrictions.

Highly accurate traces, copper pours, masks and silkscreens/

Overlaying the original PCB you cannot tell a difference in any aspect, so a perfect replacement.

The PCB should be 0.8mm thick.

Finish can be 1oz ENIG, however it is better if you ask for Hard Gold (used when there are gold edge connectors to make them more durable).

The solder resist should be PANTONE 556 C if possible (that will give close to original green color). If not choose any color solder resist you want.

Silkscreen is white.

Source https://github.com/angelsix/retrosix-resources/tree/main/

ds_lite_clicky_buttons - DPAD (ABXY is a separate project)

Blog post - https://facelesstech.wordpress.com/2022/07/23/ds-lite-clicky-buttons/

ds_lite_clicky_buttons - ABXY (DPAD is a separate project)

Blog post - https://facelesstech.wordpress.com/2022/07/23/ds-lite-clicky-buttons/

For Raspberry Pi ZERO, IO Board, Network test Project info at https://github.com/Sd4Projects/PiExp

For Raspberry Pi ZERO, IO Board Project info at https://github.com/Sd4Projects/PiExp

Qimera (pronounced as “Chimera”) is a 54 key split ergo keyboard design. The board is reversible so you can use the same board for the two halves. It uses the nice nano v2 microcontroller with Kailh choc switches, and is completely configurable using ZMK.

NOTE: This design is made specifically to be fabricated using the “After Dark” service (given all the PCB art drawn on the copper layers). To get the full effect of the design, I would recommend getting the PCB in the “After Dark”, but the regular purple also looks good :)

Final design of USID PCB for work presented in: https://ieeexplore.ieee.org/document/10496966/

LocoNet shield for Arduino MEGA or Due with ProMini LocoNet processor. Can be used with GHL CTE shield for TFT display and large FontIC.

LocoNet Distributor 14 way

Simple board to mount cheap PCM5102 Aliexpress DAC boards to RPi Zero W.

This design adapts the 10 pin 50 mil picth JTAG header pinout used by Arm to the 10 pin 100 mil pitch header pinout used by Altera for their Blasters. It works great with the Tigard board and openFPGALoader.

Ultrasound Identification (USID) Eval board. designed to work with single-ended BNC transducer to transmit and receive codes, PJRC Teensy 4.0 board on headers, and two-level line codes. Transmit data and coding scheme and frequency are user-determined via Arduino/Teensy code. Compatible with either USB (via Teensy) or 5V benchtop (via terminal block) power. Also compatible with external trigger.

A simple USB power supply for the ESP8266-01 board. It’s simple and small. Due to the µUSB connector (hard to solder!) you can use this board as an universal power supply for your ESP8266-01!

The ESP cannot be soldered directly onto the board. You must use a precision socket!!

Please have a look at at GitHub for updates!

GPIO0, RST and CH_PD are pulled up. GPIO2 is directly connected to J2 but can be pulled up by using an optional 4k7 ohm resistor for R4.

J1 : JAE DX4R005J91 µUSB connector

C1 : 100nF

C2 : 10µF

C3 : 100nF

C4 : 22µF

R1 : 4k7 (CH_PD)

R2 : 4k7 (RST)

R3 : 4k7 (GPIO0)

R4 : 4k7 (GPIO2) [OPTIONAL!!]

U1 : LT1117IST-3.3

J1: Power supply for external sensors.

J2: Can be used for external sensors (DS1820, DHT11…)