Shared Projects by Opabinia

Note (180314): This board has been tested and found to be working according to expectations! Correction of some minor design flaws is underway! A new but untested design is available here: https://oshpark.com/shared_projects/uIL9j2Ex

The quick and dirty mockup code is available here: https://github.com/overengen/Pedestrian_Crossing_for_the_RPi

Warning! This board hasn’t been tested yet, but the mock-up did work as intended but there might still be issues that needs to be addressed such as the “be or not to be” capacitor placed over the buzzer. And then there is this tiny detail about the order of LEDs and resistors… Mounting holes are missing, and the board might be ½ mm to short. Watch out for future revisions!

This is my first attempt to design a PCB for the Raspberry Pi. It’s a dead simple design and supposed to fit on top of a Raspberry Pi (65x56.5mm). With a bit of coding the Raspberry Pi should be able to control all the LEDs, the buzzer and read the push button. My intention is to use this as a base for a coding project at school. Pin numbers (connecting to the switch, the buzzer and the LEDs) are written on the surface of the PCB as a reference in order to make coding a bit easier.

BOM:

3 x 10mm LEDs (red, yellow, green).

2 x 5mm LEDs (red, green).

1 x 3mm LED (yellow or white).

1 x Switch 4pins, 6mm.

1 x Buzzer

6 x Resistors (~50 Ohm)

1 x Connector (20x2)

Warning! This board hasen’t been tested yet, there might still be issues that needs to be addressed. Watch out for future revisions!

Note (180314): A previous and tested version of this design is available here: https://oshpark.com/shared_projects/wrF9XJDk

The quick and dirty mockup code is available here: https://github.com/overengen/Pedestrian_Crossing_for_the_RPi

The pin layout has been changed in this later revision of the PCB, but this is easily corrected in the program by swapping out a few numbers accordingly.

Update: v0.5 - Adjusted position af the mounting holes and dimensions around the corners that was slightly of and smaller in arc.

Update: v0.4 - Rearranged som of the graphic, redesigned the wiring and pinout to make them follow a more logical order and easier to use while programing.

GPIO Reference:

P20 - Red 10mm

P21 - Yellow 10mm

P22 - Green 10mm

P23 - Red 5mm

P24 - Green 5mm

P25 - White 3mm

P26 - Switch

P27 - Buzzer

This is my first attempt to design a PCB for the Raspberry Pi. It’s a dead simple design and supposed to fit on top of a Raspberry Pi (65x56.5mm). With a bit of coding the Raspberry Pi should be able to control all the LEDs, the buzzer and read the push button. My intention is to use this as a base for a coding project at school. Pin numbers (connecting to the switch, the buzzer and the LEDs) are written on the surface of the PCB as a reference in order to make coding a bit easier.

BOM:

3 x 10mm LEDs (red, yellow, green).

2 x 5mm LEDs (red, green).

1 x 3mm LED (yellow or white).

1 x Switch 4pins, 6mm.

1 x Buzzer

6 x Resistors (~50 Ohm)

1 x Connector (20x2)

A Tiny Cheat Sheet for all those fruity moments!

Get a grip on those pins with this Cheat Sheet, also doubles as a measurement for a zero (65x30mm).

Note: - The Cheat Sheet will fit perfectly on top of a straight pin header but might not fit inside a case. The round edges might have a slightly different curve compared to the board of a zero and the mounting holes are a tiny bit wider (3mm vs. 2.75mm).

Just for fun - A Tiny Fruit!

Connect it to a Raspberry or a Micro:bit to make it buzz!

Update: v0.2 - Moved the jumper, cleaned up the silk screen layers, rerouted the copper to make it look really nice in all its simplicity!

Just for fun - A Tiny Fruit!

Connect it to a Raspberry or a Micro:bit to make it shine!

Update: v0.2 - Cleaned up the copper and silk screen layers to make it look really nice in all its simplicity!