You guys like to diy things?
Look here:
http://www.aces.edu/~gparmer/efi/temp/wb/guide.html#circuit%20board
You can monitor the output using a cheap digital voltmeter.
Look here:
http://www.aces.edu/~gparmer/efi/temp/wb/guide.html#circuit%20board
You can monitor the output using a cheap digital voltmeter.