Shared Projects

TritiLED V2 for external battery

Bass pre-amp inspired by the musicman stingray

Basspre MM-2 by Russell McClellan is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

GitHub

You can read more on Hackaday

Basic power switch control and fan control for the mini NES, base on the Raspberry Pi full details and schematic at https://www.facebook.com/groups/miniNESbuilders/permalink/489956341190644/

Scripts to manage this PCB can be found here:

https://www.facebook.com/groups/miniNESbuilders/516239388562339/

https://www.facebook.com/groups/miniNESbuilders/508956222623989/

Front PCB: https://oshpark.com/shared_projects/fVcUTRQC

BOM: R1=150ohm R2=10K D2=1N4001 Q1=NDD02N40 (or equivalent N-MOSFET) Fan=B2B-PH-K-S JST straight 2mm pitch

Mouser BOM https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=6faa681a41

Note: Polarity on the LED is reversed, negative pole is label as positive.

Arduino Uno R3 Shield to control five PWM electronic speed controllers, one switch, and one 12V motor.

Charger PSU

LIN bus module - 4 x 13A switch - rev 2

RFID card reader (MFRC522)

Latest version

MMDVM arduino due board https://groups.yahoo.com/neo/groups/mmdvm/files

MMDVM board for Arduino DUE

https://groups.yahoo.com/neo/groups/mmdvm/files

A simple electronic load

A simple RF Lowpass Filter. Component values are dependent on your filter requirements.

This board will work as either Butterworth filter (eg: http://www.calculatoredge.com/electronics/bw%20pi%20low%20pass.htm) or Chebyshev filter (eg: http://www.calculatoredge.com/electronics/ch%20pi%20low%20pass.htm). Put in your cut-off frequency, impedance is probably 50 ohms, and 9 components. (For Chebyshev, you’ll also need to specify the pass-band ripple tolerances.) Then click Calculate, and those are your component values.

This board will take either 1206 SMT capacitors, or .1" radial capacitors. It’s laid out assuming FT37-43 toroids for the inductors, but will probably work with axial pre-made inductors too, they just won’t lay flat on the board. The SMA connectors will take either vertical or edge mounted SMA connectors.

This is a Shield to hold promicro 5 axis and a 6 rotary encoder matrix and pins to wire in shift register board from Debolestis. Tested and works

This a a board of 3 rotary endcoders matrix with diodes wired to Promicro programmed with with MMJOY2 currently working in a radio panel I put together. Tested and works

A simple RF Bandpass Filter. Component values are dependent on your filter requirements.

This board will work with many Bandpass filter designs, such as https://www.electronicproducts.com/Bandpass_Filter_Design_Calculator.aspx . Put in your cut-off frequency, impedance is probably 50 ohms, and 5 L/C pairs. Then click Calculate, and those are your component values.

This board will take either 1206 SMT capacitors, or .1" radial capacitors. It’s laid out assuming FT37-43 toroids for the inductors, but will probably work with axial pre-made inductors too, they just won’t lay flat on the board. The SMA connectors will take either vertical or edge mounted SMA connectors.

A simple RF Highpass Filter. Component values are dependent on your filter requirements. I made this as an AM broadcast band blocker, cut-off at 1.7MHz. But you can put whatever values you want on it.

This board will work as either Butterworth filter (eg: http://www.calculatoredge.com/electronics/bw%20tee%20high%20pass.htm) or Chebyshev filter (eg: http://www.calculatoredge.com/electronics/ch%20tee%20high%20pass.htm). Put in your cut-off frequency, impedance is probably 50 ohms, and 9 components. (For Chebyshev, you’ll also need to specify the pass-band ripple tolerances.) Then click Calculate, and those are your component values.

This board will take either 1206 SMT capacitors, or .1" radial capacitors. It’s laid out assuming FT37-43 toroids for the inductors, but will probably work with axial pre-made inductors too, they just won’t lay flat on the board. The SMA connectors will take either vertical or edge mounted SMA connectors.

Teensy Audio Breakout for Nixon 18.5min gap

PCM2707 breakout