Experimenting with a Luminescent "Capacitor"

How to Couple a Luminescent "Capacitor" to a Photoresistor or Photodiode

Luminescent materials are analogous to capacitors in that they can be "charged" with light. Thereafter, they slowly release light, albeit with a wavelength range that may not match that of the charging light.

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More Forrest Favorites

Voltage Probe with Tone and LED Outputs

Troubleshooting your circuit: How to build an inexpensive voltage probe.

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Infrared Remote Control Tester

Quickly figure out if the batteries in your TV remote control need to be replaced.

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Booster Light for Hard Drive Activity LED

Find out how to boost the brightness of your LED.

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Experimenting with a Two-Way Optoisolator

How to Make a Two-Way Optoisolator in 60 Seconds or Less

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Making Music with an Atari Punk Console

Go back in time to the fun days of punk music and the Atari console.

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Laser Art

Introduce your laser pointer to your camera and create your own works of art.

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Toy Organ Kit

DIY 555 Timer Circuit Music Maker

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Fridge Alarm

Catch the midnight snacker in the act by building your own fridge alarm.

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Vibration Sensor Kit

The vibration sensor kit uses no moving parts to detect vibration.

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