I am trying to acquire, preferably encapsulated, a miniature audio oscillator 0.8 ? 1khz, normally biased off but activated when the control voltage is removed It must be capable of driving a miniature speaker (via an integral amp if necessary). 9V battery is the preferred power source but not critical. Does anyone know where such a thing could be purchased? As I need a lot of them, I am not into making them myself.
Thanks in advance
Patrick