This circuit was obtained in an Electronics World of 1968. The operational amplifiers ones are types of the time, no longer used today. The circuit responds from less than 20 Hz.
This circuit can be used in instrumentation to obtain a very high input impedance for measurement of...
This application is from a circuit manual from the 90s and only works with incandescent lamps. The triac...
This TTL pulse stretcher or stretcher was found in a 90's EDN. The time constant R x C1 determines...