Hi, I have a kit I built some time ago with an ISD1020AP sound recording chip on the board. I have used the unit for years and it still works, however I have combined the unit with a P4003’1 stereo amp and a sound triggering unit. The whole unit is a sound activated burglar alarm with the sound chip playing a dog barking. It was very successful but the trigger circuit has stopped working and I need the circuit diagram for the sound board. Can anyone help please?
Regards John
Hi,
You might try the link below
http://www.velleman.eu/downloads/0/manual_k4400.pdf
I hope this helps.
Hi, thanks that is just what I wanted.
Regards
John