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Step 4Blinkenlights
Simplicity itself. I wouldn't mention these at all if they weren't so damn handy.
Solder a resistor (150-220 ohms is a good value.) straight onto the negative lead of some LEDs. It'll light up from around 2v-6v without burning out.
And the resistor helps you to remember which side is negative.
Stick them wherever you want to know there's electricity. Figure out if that transistor is blown. Turn a nicad battery pack into a long-lived nightlight.
Use a blinky-code interface to read values out of your microprocessor (slowly). Or make 8 of them and you've got a one-byte display (plus the active ingredient in Cylon eyes.)
Make them. Make many. Make them now.
Solder a resistor (150-220 ohms is a good value.) straight onto the negative lead of some LEDs. It'll light up from around 2v-6v without burning out.
And the resistor helps you to remember which side is negative.
Stick them wherever you want to know there's electricity. Figure out if that transistor is blown. Turn a nicad battery pack into a long-lived nightlight.
Use a blinky-code interface to read values out of your microprocessor (slowly). Or make 8 of them and you've got a one-byte display (plus the active ingredient in Cylon eyes.)
Make them. Make many. Make them now.
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May 3, 2011. 3:02 PMmandiom
says:
Excellent idea for beginners!! Very handy, congrats!
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