Sine Triangle Square Saw Burst Sweep Noise – runs on a PIC16F870

After the recent demise of our multifunction signal generator, we decided to make one of our own.   The circuit uses a PIC16F870 (about $3), an R/2R resistor ladder network (for a real fast and cheap D/A),  and a few other parts. You can check out the schematic and the current source file.  Also the object (hex) file.  All of the sine wave functions utilize a full 256 byte by 8 bit lookup table.  Contrary t ...

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Function Generator using PIC16F870 microcontroller

Sine Triangle Square Saw Burst Sweep Noise - runs on a PIC16F870 After the recent demise of our multifunction signal generator, we decided to make one of our own.   The circuit uses a PIC16F870 (about $3), an R/2R resistor ladder network (for a real fast and cheap D/A),  and a few other parts. You can check out the schematic and the current source file.  Also the object (hex) file.  All of the sine wave fun ...

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2.5 GHz Frequency counter using PIC16F870

Background It is time to update the frequency counter again. A frequency counter is one of the most important measuring tool we need as homebrewers of RF electronic. This frequency counter has very high performance and still is very easy to build and to use. Anyone can build it and have fun. The counter is based around 6 LED displays which will present the frequency with 1kHz resolution. I don’t find it nec ...

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