Using KiCad, I implemented a design for an analog circuit that would blink LEDs. The basic rundown of the circuit is that Q1 turns on immediately because it is connected directly to power. This allows current to flow through the first row of LEDs in the middle of the schematic. While those LEDs are on, C2 begins to charge up. Once C2 is charged, Q2 will turn on which allows the second row of LEDs to turn on and C1 to discharge which turns off Q1 because the current will flow through C1 instead of going into the base of Q1.
I needed some way to stand the PCB up, hold the battery, and house the on/off switch. To do that, I used a CAD modeling software to design the stand shown to the left which holds the battery and the switch. The stand is easily made on a 3D printer in less than 45 minutes and requires no supports.Â