This board is a dual one-shot multivibrator. The delay is controlled by a capacitor and a resistor and either the on board or external components can be used. Front panel mounted variable components can be used to allow the timing to be controlled by the user. Delays from 400 nanoseconds to 4 seconds can be generated. When triggered it generates a pulse for the specified length.
This board cost $44 in 1968.
Schematic of board as a scanned PDF file.
Back of board (234K)
Previous picture Next picture
Back to Previous page All of R series PDP-8 board information and pictures