Tech America has a close-out going on a Signal Generator kit for $5.85. I went to the one here yesterday and there were none in stock but managed to order one. I don't know anything about this it could be cool or not! It says sine/tri/sq/integrator outputs 0-100mv runs on a 9V battery. S# 990-0315 1-800-813-0087 http://www.techam.com -tg