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    Optoisolators

    Optoisolators
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    OPT-1

    $7.50

    Optoisolator for Fender Vibrato Circuits.

    Optoisolator for Fender Vibrato Circuits.

    OPT-3

    $3.50

    Includes Hi-bright white LED, photoresistor cell, and heatshrink tubing. You glue the two devices together head-to-head and then slip the heatshrink over them. You fill the ends of the heat shrink tubing with opaque glue, allow it to harden, and you're ready to go. The LDR (light dependent resistor) cell has an ON resistance of <1000 ohms and an OFF resistance of >20 Meg ohms.

    Click here for build instructions

    Roll your own LED optoisolator module.

    OPT-5

    $4.50

    Unlike the LED and neon types of this device, with the incandescent type you can achieve fairly linear control of a signal level by modulating the current through the incandescent lamp. Includes choice of 3, 6, or a 12 volt grain of wheat lamp for very low current requirements, photoresistor (LDR) cell, and heatshrink tubing. You glue the LDR to the side of the incandescent lamp and then slip the heatshrink over them. You fill the ends of the heat shrink tubing with opaque glue, allow it to harden, and you're ready to go. The LDR (light dependent resistor) cell and lamp combination has an ON resistance of <1,000 ohms and an OFF resistance of >20 Meg ohms.

    Click here for build instructions

    Roll your own incandescent optoisolator module for comb filters, phase shifters, volume controllers, all kinds of applications.

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