This circuit uses Microchip’s PIC16C71, an 8-bit microcontroller, to create a digital voltmeter with an LED display and a keypad. To view the application note, click on the URL below. Circuit selected ...
If you need high-security intrusion detection, not all keypads are created equal. As you’re entering your unique PIN code at some keypads, for instance, a favorite technique of bad guys is to “steal” ...
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