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Circuit Board Design Class
We used Z80-MCB ( http://rio.early8bitz.de/hw/hw-boards-mcb.htm ) as a development platform for controlling a speech synthesizer in 1981-1982. It was later replaced by a Swedish Zilog based computer ABC-80. The first languages we used were Assembler and PL/M. I remember bending and disconnecting the timer interrupt pin from the CPU to stop it causing problem :)
A couple of notices. In Europe we have 230V so a 100W load would only need 0.43 amps. However, one cannot (easily) purchase old style bulbs with bigger than 60W due to EU regulations. Moreover nowadays it is almost a rule to use LED bulbs where the wattage (and thus amperage as well) is roughly one tenth of an old-style bulb.
The video links are dead so this instructable should be removed because there is no way to see what or how something is made. The error below can be found for each of the video links.NetworkError: 404 Not Found - http://www.metacafe.com/fplayer/686796/step_1_bui...So it is not your computer/phone/tablet. The video simply does not exist.