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PC based Frequency Meter
Here is a simple technique for measuring frequencies over quite a wide frequency range
7 segment rolling display using PC
It is very interesting and convenient to be able to control everything while sitting at your PC terminal

Control electrical appliances using PC
Here is a circuit for using the printer port of a PC

Simple Analog to Digital Converter
Normally analogue-to-digital con-verter (ADC) needs interfacing through a microprocessor to convert
 


 
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