Beautiful and clever
The Monarch flashes its LEDs when its antennae touch. But it's also clever! It uses a clock source and shift register in a particular configuration in order to generate its patterns. Through it, one can learn about the basics of digital design, clocking, and randomness.
Assembly and usage
The project includes the following components
1x 555 IC timer, TI TLC555CP
1x Quad 2-input XOR, TI SN74HC86N
1x Octal D-type flip-flop, TI SN74HC273N
1x IC DIP 8 contact socket, TruConnect DS1009-08
1x IC DIP 14 contact socket, TruConnect DS1009-14
1x IC DIP 20 contact socket, TruConnect DS1009-20
8x 5mm clear lens red LEDs, TruOpto OSR5PA5C31C
1x Switch, C&K JS202011SCQN
1x CR2032 batter clip, Multicomp BC-2001
2x 1µF capacitors, Suntan TS170R1H105MSBFA0R
3x 10KΩ resistors, Multicomp MCF 0.25W 10K
18x 560Ω resistors, Multicomp MCF 0.25W 560
16cm of 20AWG wire
Follow the infographic paying attention to the following information: the wire in the kit might be a bit short so use resistor leg cutting, the gap between the socket and PCB, and the recommended floating XOR input fix.
The Monarch is an open source design, as is most of our work. You can find the design files for the hardware and packaging at our GitHub repository. You can edit the design files using our own PCB design open source software, PCBmodE.
This project was a collaboration with Eurocircuits who manufactured these wonderful PCBs!
Finally, community contributions for this project are on our community site.