Found in a 1967 General Electric documentation, this meter uses Nixie tubes, popular at a time when LED and liquid crystal displays did not yet exist.
This audible continuity test was obtained in a book from the 90's describing simple projects. The...
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...
An integrator of exceptional qualities is obtained around an LM108, as shown in the figure. The...