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50 MHz frequency counter, voltage meter & SWR/PWR indicator
Posted by admin on February 27th, 2008
This is a very cool project for all hobbyists.It is a PIC16C71 based 4-digit LED frequency-counter & Volt-meter. Some hard to find parts used in the previous version, which are out of production for some time, has been omitted. A rather early PIC16C71 has also been replaced by 28-pin device PIC16F876. The later is capable of driving 4 digit LED display in multiplexed mode while measuring frequency, power supply voltage as well as handle two analog inputs to display SWR/PWR signal strength in a bargraph manner. There is no need for external LED display driver chip as well as external data EEPROM since it is already implemented in PIC16F876.
50 MHz frequency counter, voltage meter & SWR/PWR indicator - [Link]
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