Archive for category: Homebuilt CPUs

Ken tinkers with DTL, and SV3ORA’s transistorized 4-bit digital computer made out of discrete DTL

July 9, 2014 | Homebrew CPU, Homebuilt CPUs | By: Mark VandeWettering

Ken stumbled on one of my earlier posts about DTL (diode transistor logic) and was interested enough to do some basic exploration. He reduced the DTL NAND gate to a double diode, a transistor and two resistors. Ken sent me the LTSpice and EagleCAD screen dumps that fit in about .4″ square: Pretty cool. In […]

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Tiny-Tim: A DTL computer (in progress)

January 20, 2013 | electronics, Hardware, Homebrew CPU, Homebuilt CPUs | By: Mark VandeWettering

Previously, I had linked to Rory Mangles’ experiments with relay based computers. He had an incredible build of a relay logic computer called Tiny-8 which used paper as program mamory, inked with a pattern which could be read by photo sensors to sequence the control logic in his computer. I thought it was amazing. But […]

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