Shared Projects

Adapts a DA-15 to the standard Atari SIO Jack, which is an option on the SDrive-NUXX, 1088XEL/XLD, and standard on the 576NUC+.

UNTESTED - Under development

This is an adaptation of TransistorTester to use the Arduino Pro Mini. Inspired and heavily influenced by Stefan Wagner’s implementation. This is the reason the resistor numbering starts at R3, for instance.

This version (1.4) fixes two numbering / pin assignment errors from the previous version. This also increases the size of the vias in the display connector and several other minor tweaks.

Bill of materials:

• 1x U1 - Arduino Pro Mini
• 1x U2 - 2.5v Precision Voltage Reference, LM4040DBZ-2.5, SMD SOT-23-3 footprint, Optional
• 1x U3 - I2C 0.96" OLED Display
• 1x J1 - 6-pin Female, 2.54mm Header Socket
• 1x J2 - USB Micro-B, Molex_47346-0001 (Used for power only)
• 1x J3 - 6-pin Male, 2x3, 2.54mm Header, Optional (ICSP interface)
• 1x SW1 - Push Button Switch 6mm (SW1), or 12mm (SW2)
• 1x R3 - 27k Ohm resistor, SMD 0603 (1608 metric) footprint
• 1x R10 - 2.2k Ohm resistor, SMD 0603 (1608 metric) footprint
• 3x R4, R6, R8 - 680 Ohm resistor, SMD 0603 (1608 metric) footprint, use 1% or better precision
• 3x R5, R7, R9 - 470k Ohm resistor, SMD 0603 (1608 metric) footprint, use 1% or better precision

References and Sources

• Article
• Original Code Repository: svn://mikrocontroller.net/transistortester
• Code Browser
• My code repository
• KiCAD repository
• Stefan’s Design

UNTESTED - Under development

This is an adaptation of TransistorTester to use the Arduino Pro Mini. Inspired and heavily influenced by Stefan Wagner’s implementation. This is the reason the resistor numbering starts at R3, for instance.

This version utilizes a “raw” ATMega328P with internal clock.

Bill of materials:

• 1x U1 - ATMega328P DIP (w/optional 28-pin narrow DIP socket)
• 1x U2 - 2.5v Precision Voltage Reference, LM4040DBZ-2.5, SMD SOT-23-3 footprint, Optional
• 1x U3 - I2C 0.96" OLED Display
• 1x J1 - 6-pin Female, 2.54mm Header Socket
• 1x J2 - USB Micro-B, Molex_47346-0001 (Used for power only)
• 1x J3 - 6-pin Male, 2x3, 2.54mm Header, Optional (ICSP interface)
• 1x SW1 - Push Button Switch 6mm (SW1), or 12mm (SW2)
• 1x R3 - 27k Ohm resistor, SMD 0603 (1608 metric) footprint
• 1x R10 - 2.2k Ohm resistor, SMD 0603 (1608 metric) footprint
• 3x R4, R6, R8 - 680 Ohm resistor, SMD 0603 (1608 metric) footprint, use 1% or better precision
• 3x R5, R7, R9 - 470k Ohm resistor, SMD 0603 (1608 metric) footprint, use 1% or better precision
• 2x C1, C2 - 100nF capacitor, SMD 0603 (1608 metric)
• 1x C3 - 10nF capacitor, SMD 0603 (1608 metric)

References and Sources

• Article
• Original Code Repository: svn://mikrocontroller.net/transistortester
• Code Browser
• My code repository
• KiCAD repository
• Stefan’s Design

Flash ROM Adapter

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License

Want to Support my work? Feel free to Donate

Bluejay board

2 jumper pins instead of 3

the DHT22 sensor (DSU)

A version of the MBC5 Flashcart that fits in an original GBA cart shell

MiniLNA: Low Noise Amplifier based on PSA4-5043+ from Mini Circuits

This should be good for after-dark PCB. Subtle contrast at both top and bottom because of clear soldermask.

This is also good for purple PCB. Some texts are covered by soldermask but still visible.

All the names are still there.

1octaveDrivers

Raspberry Pi power support board with screw terminal and switch to solder from the bottom side of the Raspberry without blocking pins.

Switch type: THT JS202011CQN

Screw terminal type: RUNCCI-YUN 100PCS300V10A

It was made to power some RPI4s inside a Kubernetes cluster with a 5V power supply and simple wires. The RPI4s are cooled by an alu case

Additionally, there is an easy access to the serial line via a pin header, eg. to connect an ESPxxXX.

Matrix for daisy chained neon pixels. details detailed blog

or hackaday.io

5V DaisyChained Neon bulb. details : detailed blog

or hackaday.io