Good day to all. The recent discussion about controlling the frequency of a signal=20 generator reminded me of a project that I've been meaning to do for=20 years. But it's been sitting for so long that I should see if anyone=20 has done anything similar to what I want. I have a couple of older BK Precision function generators. These=20 cover the range of sub-Hz through, I think, 5 MHz. They work well=20 but suffer one tragic flaw: it is not possible to know what frequency=20 you are generating without using an external frequency counter or scope. I want to add a digital frequency readout to these units. There is=20 space in the upper-left corner of the front panel that is just crying=20 out for some form of readout. I've seen a couple of frequency meter projects over the past few=20 years - most are simple and use a PIC's TMR0 and its' prescaler to=20 measure a signal up to 50 MHz. But I'm picky. I want something that=20 measures and displays frequency when the generator freq is above,=20 say, 1 KHz but measures period and converts that period measurement=20 to frequency at lower freqs. This allows quick display updates even=20 when generating low-frequency signals. Bonus points if the unit can also measure and display period as well=20 as both positive and negative pulse width. I could write it myself but surely someone has already done something=20 similar to this. I hope. Any thoughts? Many thanks! dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .