• A single vactrol for use in amplifiers or analogue synthesisers
• Uses an LED and LDR to control the resistance in a circuit
• 100dB dynamic range and high dark resistance
• Fast response timeWhat is a vactrol?
A vactrol (or resistive opto-isolator) is an electrical component that consists of a light emitting diode (LED) and a light dependant resistor (LDR or photoresistor). When the voltage passes across the LED, the resistance of the LDR changes. This means that you can control the resistance in a circuit by altering the voltage to your vactrol’s LED.
What can I use this vactrol for?
Vactrols can be used in guitar amplifiers, analogue synthesisers and amateur (HAM) radio systems. The VTL5C1 has a very high dark resistance and fast response time. As the input current increases, the output resistance decreases.
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