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Blinking an LED as it was done in the 1970s (555) and the 1990s (AVR).
I am using this project to learn KiCAD and SMT fabrication. Also learning to use pogo pins to flash a microcontroller.
I designed and built a jig to hold pogo pins against the board's ISP headers to program the AVR. In the end, I did not use the jig; it did not press the pogo pins against the contacts hard enough to make a solid connection.
I found Nick Sayers' AVR ISP Pogo Adapter v0.5 on OSH Park and ordered it. I soldered the pogo pins to two boards 7 mm apart so the pins would be well aligned.
I use ecad.io to create STEP files representing the boards' geometric shapes. I imported the boards into Fusion 360, modeled a pogo pin, and designed a jig around them.
If I did it again, I would do it very differently. I think I would flip the jig over so the board sits on top, with some kind of latch to hold it in place.
Getting to Blinky 4.0 Video tutorials for KiCAD 4.0
Flashing LED Circuit Simple 555 astable circuit. Cribbed mercilessly.
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