This circuit is from a 60's documentation. The circuit uses components from the era and serves to monitor a 150V continuous power line.
We found this circuit in an English publication from 1977. The circuit does not need a symmetrical power...
This circuit, from a 1988 documentation, activates a relay for a period and has a touch shutdown as...
This two-channel transmitter for the 27 MHz band was found in a recent English publication. The...