This circuit was found in an ancient American documentation. The power supply is not given, but we have the voltages used. The relay is sensitive type for high voltage.
The figure shows how to implement an amplifier with gain 10 using the operational amplifier LM41....
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...
This circuit shows how it is possible to control 9 loads with only 6 Triacs using the matrix...