Found in a 90’s Electronic Engineering, this circuit detects the lack of phase in the supply of a three-phase load, powering a cut-off system.
We can implement this filter with more modern equivalent operational amplifiers, since the LM110 is...
This stethoscope or amplifier for hearing aid using a crystal headset and microphone was found in a...
The normal use of a 4520 as a divide-by-16 counter is shown in Figure bellow. In the normal...