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I’ve wired up Experiment 9 from the book Make:  Electronics by Charles Platt.

This experiment shows you can use use a resistor and a capacitor to create a timer.  The multimeter on the left measures voltage.  As I swap in a 100K resistor, a 47K resistor, and a 10K resistor, the charge up time gets faster and faster.  In other words, the less resistance in the circuit, the “quicker” the flow of current to the capacitor, and the faster it charges up.

I’m using the push button in this experiment to complete the circuit, that way it’s not always going while I swap out resistors.

This entry was posted on Sunday, January 10th, 2010 at 1:25 pm and is filed under Learning Electronics. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.