Found in a 1969 EEE, this circuit is based on an operational amplifier of the time and on old type MOSFETs. The components support modern equivalents.
By connecting the output of an amplifier to this circuit, the X1 lamp will flash at the same rate...
This digital to analog converter circuit can use any digital switch IC. The circuit is from a July...
We find this circuit in a manual of the 80's own used components. The circuit provides an...