Hardware Hacking 123Rule #18: Always leave you original breadboard design intact and functional
until you can prove that the soldered-up version works.
Rule #19: Always use a resistor when powering an LED, otherwise the circuit
and/or LED might blow out.
Rule #20: Distortion is Truth. (Poss’s law)
Rule #21: It is easier to drill round holes than slots.
Rule #22: Never trust the writing on the wall-wart.
Appendix 2: The Laws of the Avant Garde
Rule #1: Do it backwards.
Rule #2: Slow it down, a lot.
Rule #3: Make it louder, a lot.