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Assorted ZX81 addons -- hires graphics, dynamic clock speed switching, etc.
to electronics retrocomputing sinclair zx81 ... on 31 October 2012
D A N Y K . W Z . C Z edit / delete
Make your own X-ray machine, amongst a wide selection of other terrifying mad-science projects.
to electronics insanity photography retrotech xray ... on 22 October 2012
Commodore 16 64K memory upgrade edit / delete
Turning a C16 into a Plus 4 (just without the user port): replace the RAM chips and add the missing address lines. I'm really tempted to do this, given that I have three C16s -- it's the machine I first learned to program on -- and there appears to be an enormous (mostly Hungarian, for some reason) library of Plus 4 software available.
to c16 commodore electronics plus4 retrocomputing ... on 19 October 2012
Dean Forest Railway Telecoms edit / delete
A preserved railway with a period-appropriate telephone system (if you ignore the Asterisk server!).
to electronics phone retrotech telecom train ... on 28 September 2012
Battery Showdown — The Best AA Battery You Can Buy? edit / delete
A decent comparison of a wide range of AA brands. The executive summary is that within each chemistry, they're all nearly indistinguishable -- so (provided you stick to alkaline batteries, not zinc or lithium) you should just buy whatever's cheapest. Which works for me.
to aa battery electronics ... on 28 September 2012
Welcome to Richardsradios-collection of old radios and test equipment edit / delete
to electronics radio repair retrotech test-equipments ... on 07 August 2012
ZL2PD Digital HF Antenna Analyser edit / delete
Another DIY antenna analyser.
to antenna electronics radio test-equipment ... on 06 August 2012
Universal Low Pass Filter Kit edit / delete
to electronics filter radio ... on 06 August 2012
Mike's Hobby Home Page edit / delete
DIY Apple 1 and Apple 2 motherboards (and prototyping cards, etc.). Very neat stuff.
to apple apple1 apple2 electronics retrocomputing ... on 30 July 2012
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tasty by Adam Sampson.