Propeller musical instrument, audio problem
cparker
Posts: 14
Hello. I'm working on a musical instrument using the propeller to control solenoids that tap on the end of PVC pipes to make sound. So far everything is working well, but we're having trouble with an audio circuit that I thought folks here could help with.
We're wanting to place a cheap electret microphone in each PVC tube and chain them together, then run the signal into an amplifier. The circuit we're experimenting with is attached. The microphones require a small 'biasing voltage' (not sure that is the correct term) of around 9-12v. Since we only have one power supply, and one amp with two channels, we would like to splice several mics together and run the combined signal into our amp. Connecting two mics in this way seems to work OK, but will we run into trouble if we connect 10 or 12? Is there a better way?
We thought of buying a mixing board, but that is quite expensive. So we're a bit stuck at the moment.
Any help is greatly appreciated! Thank you.
The mics we're using are these from allelectronics : http://bit.ly/hPpnvG
We're wanting to place a cheap electret microphone in each PVC tube and chain them together, then run the signal into an amplifier. The circuit we're experimenting with is attached. The microphones require a small 'biasing voltage' (not sure that is the correct term) of around 9-12v. Since we only have one power supply, and one amp with two channels, we would like to splice several mics together and run the combined signal into our amp. Connecting two mics in this way seems to work OK, but will we run into trouble if we connect 10 or 12? Is there a better way?
We thought of buying a mixing board, but that is quite expensive. So we're a bit stuck at the moment.
Any help is greatly appreciated! Thank you.
The mics we're using are these from allelectronics : http://bit.ly/hPpnvG
256 x 325 - 9K