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Step 3Building The Circuit
Before you actually solder, you should test the circuit on a breadboard. What I did was break the circuit down into chunks and test each one (the timer, the transistor, and the audio amplifier). I'm sorry I don't have any photos from the build process, but I wasn't expecting to make an instructable on the project until after I built it.
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May 17, 2011. 7:15 AMski4jesus
says:
What did you use for power? did you use a 9v battery or a 9v wall wart?
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Dec 24, 2011. 11:16 AMjakebaldwin
says:
To use a wall wart, you would need a voltage regulator in the circuit after the dc power jack. A wall wart, even when it says "9v," can supply even twice that in little spikes. You might want to google that, I don't know what the fluctuations are like exactly.
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Dec 24, 2011. 12:54 PMski4jesus
says:
Yep. I have bad experience with that now(That comment being a while ago) haha Such as a whole homemade amplifier being fried.
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