We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the time and the diodes in the dotted board must be mounted on the output transistor heatsinks.
This 3-digit thermometer, suggested by Texas Instruments, uses 3 integrated plus the display, with...
I found this circuit in an English magazine from July 1982. The circuit is still viable because all...
This 1965 circuit consists of a small inverter for an ultraviolet lamp. The circuit is from a...