The vaults are insufferably damp.

Thursday, May 14, 2009

Frequency Counter Assembled

My frequency counter kit arrived today from SparkFun.com. The board wasn't exactly as described on nuxie1.com but it was easy to put together. I put a red LED from my stock on it instead of the supplied green LED. I connected it to my USB hub, tweaked the LCD contrast, and there it was: 0 hz.

The circuit board was nicely done. When they added a USB miniB SMT connector they crowded the LCD contrast control against the 6 pin ICSP connector, but it looks like it will still work. The ICSP header wasn't included in the kit, so I added one, again from stock.

I want to build some radio frequency circuits, so hopefully this will help me tune them up. I'll probably add a divide-by-ten front end to it and some signal conditioning. The kit claims to work to 2MHz or higher. If I can get it up to 30 MHz with a prescaler I think it will suit me fine.

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