The soldering kit is available HERE!
The Gerber file can be found on GitHub as a Release:
NOTE: The latest Gerber, and thus the design, includes a JLCJLCJLCJLC silkscreen label. This is used by me when ordering from JLCPCB (no endorsement nor recommendation, just what I use). If you are to use a different manufacturer, I recommend you change or remove this label in the KiCAD file.
Click on the icon bellow to be directed to this kit's source code (including the instruction's SVGs, KiCad files, etc.)
Here are the different soldering instructions (Click on one to open it in a new tab):
This circuit is based off of a jellybean transistor astable multivibrator circuit. I recomment you check out the following explanations to lean about how it works (a better explanation than what I could come up with)
Explanation by electronics-tutorials.com
Explanation by electrosome.com
I am connecting 2 LED's cathods to each transistor with a series current limiting resistor (without the resistor, the LEDs would cease to light, maybe even release the magic smoke if you're lucky). Which 2 of the 4 LEDs that are connected to a particular transistor (and thus will blink together) is dependent on the jumper configuration. This is also why the intructions specify to make the LEDs that are blinking simoltanously the same color, as if a blue and red LED for example are connected to the same current-lmiting resistor, the blue LED will not light up but the red one will (due to the LED's different fowards voltage drop, ~2.2v for a red LED and ~3.2v for a blue LED).
If you have access to a 3D printer, you could print a nice enclosure for this kit (as a nice finishing touch). There are currently two models: A rectangular enclosure and a car enclosure. Pictures of them are coming soon!
Click on the coresponding ZIP icon below to download the STL file
|Rectangular STL||Car STL|
Click on the first page of the instructions below to open the full instruction PDF for the enclosure. Currently there is only one for the car assembly
Here are some nice images I took for the kit, which could be used as a reference while troubleshooting(Click on the image to load a high-res version of it):