DarrenF
Well-known member
I've been needing an audio probe to trace audio signals from their generation thru circuits to the amp.
I understand some people use small amplifiers. And I've heard of headphones being recommnended. I didn't want the complexity of a powered amplifier, and I didn't like the idea of low input impedence like headphones would provide.
I ended up using a piezo "buzzer" from Radio Shack. #273-074: http://www.radioshack.com/product/index.jsp?productId=2062403
Just wired a lead to the - leg to a clip, for attaching to a convienent ground. Then another wire with a probe-like tip to the + leg.
Works well, IMHO. Not high-quality audio, of course, but adequate. The level is typically pretty low. I need near silence, or I need to put it right by my ear. But it allows me to hear audio. I've probed things from the output of an AY-3-8910 output, all the way to the final speaker output.
I understand some people use small amplifiers. And I've heard of headphones being recommnended. I didn't want the complexity of a powered amplifier, and I didn't like the idea of low input impedence like headphones would provide.
I ended up using a piezo "buzzer" from Radio Shack. #273-074: http://www.radioshack.com/product/index.jsp?productId=2062403
Just wired a lead to the - leg to a clip, for attaching to a convienent ground. Then another wire with a probe-like tip to the + leg.
Works well, IMHO. Not high-quality audio, of course, but adequate. The level is typically pretty low. I need near silence, or I need to put it right by my ear. But it allows me to hear audio. I've probed things from the output of an AY-3-8910 output, all the way to the final speaker output.