Physical hit counter V2
This is a Physical Hit Counter V2 designed by Bob carret. Bob writes:There is nothing more in this version except, I use MAX7219 and 7-segment common cathode LED display x 8 instead using mechanical counter like the early version. MAX7219 is a 8-Digit LED Display Drivers and serially interfaced.I use MAX7219 because I got two samples from MAXIM.To interface MAX7219 with PC serial port without MCU, we must convert RS232 voltage level to TTL level.
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