50 MHz frequency counter, voltage meter & SWR/PWR indicator


Posted on Apr 18, 2012

This is a successor of the PIC16C71 4-digit LED f-counter & V-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 A rather early PIC16C71 has also been replaced by 28-pin device PIC16F876.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.






Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Phone line FM transmitter
Regulated-driven-converter
Class A MOSFET Amplifier 2SK1058
Electronic counter
programming pen usb interface
Higher Order Filters
Micore Reader IC Family Directly Matched Antenna Design
LM331 Frequency to Voltage Converter



Top