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Engineer's Assistant Using a PIC16F84A

From Microchip Technology, Inc.
 

 
This compact instrument is intended to be a digital laboratory tool for hardware and, in some cases, software debugging. It contains four instruments in one unit: logic probe, single channel logic state analyzer, frequency counter and serial code receiver. The only chip used is a PIC16F84A running at 10 MHz. The display unit is a LCD dot matrix alphanumeric module with 2 rows of 20 characters. The LCD is used as the display device for all functions, except for the logic probe which indicates low, high and pulse logic states on individual LEDs. Mode select, parameter change, function execute and ON/OFF switching is activated by two keys. The probe tip is the common input for all functions, and the GND cable is used for connection to Vss of the tested circuit.
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