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Pegasus Board. Ferranti UK 1956-1962. To increase efficiency and simplify repairs, the Pegasus computer was designed with boards which could be swapped for repairs and replacement. Nearly 500 of these boards were mounted in rows inside a cabinet nearly 3 metres long, and two metres high. This board is a single AND gate with two valves.
Ehn't the purtiest etch evar, but it'll probably do.
(Some of what loox like gaps are artifacts of playing with overexposure.)
I finished the final (hopefully ;) PCB design! Now I have more time for writing the firmware: bitbucket.org/wizard23/magicshifteros
I'll won't do any eagle design the next weeks ;)
Dépannage informatique Genève pour particuliers, indépendants et PME.
Cours d'informatique Genève
Création site web
Création e-boutique
Référencement web
Marketing 2.0
Gestion de campagnes publicitaires
The component side of the keyboard PCB, which contains much of the internal circuitry.
The 2 large ICs are the top are the display drivers. The square IC roughly in the middle of the PCB is the 80C32 microcontroller, to the right of this is a smaller square IC which is the CCITT modem. The system ROM is the socketed IC in towards the lower left, to the right of that is the 8K RAM. The 2 small ICs at the right are the PLLs to dectect baudot mode tones (1800 and 1400 Hz), with red-painted presets to set the frequencies. The 3 medium-sized ICs in a row to the left of the processor are system I/O ports, below them (near the ROM) are the keyboard column driver and address decoder. The small IC to the left of the display drivers is the contrast control multiplexer. Along the bottom edge of the PCB are an output port to drive the DAC next to it and a pair of quad op-amps ICs (transmit filter to the left, receive filter to the right)
A collection of boards from the tinyCopter project. More information at my blog: www.qwertyboydesign.wordpress.com