1. This case looks like it was taken out from fire :D

Posted at 5:57AM on Jul 30th 2007 by maros

2. Yeah, she's taken on one too many gamma rays.

Posted at 6:49AM on Jul 30th 2007 by AustinMiniMan

3. It is pretty ugly. And the range is strange: who needs a 500 kHz Frequency Counter? All the commercial ones reach the Gigahertz range. Which sources was this designed for? 33 khz clock crystals? Everything else than a simple waveform requires another solution anyway...

Posted at 8:53AM on Jul 30th 2007 by devils advocate

4. I don't like to dump on anyone's personal projects. IMO these are the kinds of projects that you learn from. However, I'd recommend that anyone who would consider building one to act as a lab counter might be better off visiting a swap meet or a tech company garage sale. Besides, a cheap used analog O-scope is pretty handy for checking frequency.

Posted at 10:29AM on Jul 30th 2007 by pokey

5. Measuring RPM's of rotating equipment would be a perfect use for this.

Posted at 1:10PM on Jul 30th 2007 by upriverpaddler

6. It's a cool project, it just needs to have that cosmoline wiped off of it.

Posted at 4:04PM on Jul 30th 2007 by strider_mt2k

7. just search google for AVR "frequency counter" and you will find tons of better designed circuits that operate up to several hundert MHZ

Posted at 7:05PM on Jul 30th 2007 by devils advocate

8. Home-made 5hz to 500Khz Frequency-Meter? That 500,000hz someone needs check their typo. Because that is way out of the audible range of 20hz-20Khz

Posted at 5:46PM on Jul 31st 2007 by sal