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Dvm Adapter For printer port PC Circuit

2017-08-16 19:50  
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Here is a circuit for using the printer port of a PC, for control application using software and some interface hardware. The interface circuit along with the given software can be used with the printer port of anyPC for controlling up to eight equipment .The interface circuit shown in the figure is drawn for only one device, being controlled by D0 bit at pin 2 of the 25-pin parallel port. Identical circuits for the remaining data bits D1 through D7 (available at pins 3 through 9) have to be similarly wired. The use of opto-coupler ensures complete isolation of the PC from the relay driver circuitry.The adapter consists of a voltage to frequency adapter with a signal conditioner and protection circuit. J2 connects to the game port of a PC.See reference listed for software for use with this circuit.An inductance meter adapter circuit would be helpful since you can measure inductance using your general purpose digital voltmeter (DVM).

Dvm Adapter For Pc Circuit