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  1. zgnoh

    again, microphone input high school project

    Circuit Diagram Here sorry again,,, I know I've been quite weak at electronics. About the circuit diagram: Input from Microphone -> Retifier/Filter Circuit to convert the input wave to steady direct current of voltage similar to amplitude of wave -> Variable Resistor -> Potentiometer...
  2. zgnoh

    Please comment on my project >< thanks~

    There is an input current from a CD or a microphone. Then if the amplitude of the sound exceeds a certain level, it activates the switch opening circuit to open a switch. The circuit diagram is here, pls click. Is there any mistakes/flaws with the circuit? moreover, is the "Voltage Follower"...
  3. zgnoh

    How to use a PID circuit to regulate temp.?

    How to use a PID (proportional, integration, differentiation) circuit? Is there any pictures showing how it is connected and what is its use? thanks~
  4. zgnoh

    Need help on a project changing the strength of water of shower.

    Hi. I'm a newbie, just a teen with very limited knowledge about Electronics. I'm recently doing a project, trying to make the strength of water of shower change according to the beat of music or something like that. I propose the music is from a CD player or what and can be connected to the...
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