Imported from GitHub: munsel/JH-blinky-badge · commit ff3a895 · license BSD-3-Clause

Description

This is an oscillator circuit baked into a logo-shaped PCB.

README

Jugend Hackt Blink Badge

This is the first verison of a giveaway badge for jugend hackt. It contains a simple oscillator circuit made up of basic electrical components.

The circuit is called an astable multivibrator and one LED-eye is the inverted output of the other eye.

With two potentiometers and a screwdriver, you can adjust, how long one eye will take till it gets switched off.

How to assemble

The PCB contains footprints for two kinds of assembly:

1. Through Hole Technology

   Most of the parts can be put through the pcb, wich makes soldering easier. Beginners should take this way of assembly.

2. Surface Mount Technology

   Parts are layed on the surface of the PCB before soldering. Parts are smaller and can slip away while soldering. This is more difficult to solder by hand. Recommended for advanced solderers or if you have an reflow oven.

THT-version

Parts needed

Step 0:

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

SMT-version

Parts needed

Step 0:

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

PCB

The gerber design files are located in the 'production_files'-folder. If you don't want to customize the design, you only need to send this folder to any manufacturer.

Parts used

These are the parts used for the THT assembly.

part	quanitity	vendor
battery holder	1	reichelt
47 Ohm resistor	2	reichelt
4700 Ohm resistor	2	reichelt
SPST style switch	1	reichelt
500k trim pots	2	reichelt
10µF caps	2	reichelt
LEDs	2	reichelt
NPN Transistor EBC-pinout	2	reichelt

The selected Transistor works, but i am not shure, whether it is the best fit.

For the SMT-version you need different packages:

1. Transistors in SOT-23
2. Resisros in 1206
3. LEDs and Caps in 0805