Ideal for benchtop use, this dual-band circuit was obtained from the 1995 Electronics Now magazine. The circuit can be powered with voltages from 5 to 12 V.
We found this circuit in the Texas Instruments opto-electronics manual. The button resets and the...
This circuit uses an integrated hard to find today and the phone must be of high impedance. We...
Any general-purpose transistor can be used in this circuit that generates a rise ramp that can be...