Crystal Tester

My version of a crystal tester.
And circuit board for the project.

I needed to test some crystals for a project I was working on. I found lots of testers on the internet, but they all where lacking in one thing or another. I decided to take one of them and add the features that I wanted to it. This is the result. I also designed a small circuit board for it.

The circuit provides visual indication of oscillation. A meter output as well as an output for a frequency counter, or an oscilloscope.

C+,C- Counter/Scope Connection
M+,M- Meter Connection
SA,SB On-Off Switch

Eagle Project File - Schematic and Board

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