Free Simple Circuit Diagram
The schematic diagram below shows a digitally programmable oscillator circuit. This programmable oscillator circuit is based on V/F (voltage to frequency) converter, which is programmable by an analog voltage at the input. To make it digitally programmable, a DAC (digital to analog converter) is added to feed the V/F input. The components of the DAC is AD7520 multiplying D/A converter […]
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This is a circuit of Low-Light Level Drop Detector. This circuit utilize self-biasing configuration to detect small changes in light level. This circuit usually used in monitoring very low droplets rates. The collector of the transistor gives feedback that is used to stabilize the bias of the photodarlington. The effect on optical performance is reduced by a high base-source impedance […]
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The idea of a color organ is that any sound, including musical sound, can be transformed into light. As stated by wave theory, both music and light have similar properties: frequency. Any note, or combination of notes (chord) can be then mapped to a color. A low frequency sound can be associated to red or near infrared, and high frequency […]
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This is a schematic diagram of general-purpose audio frequency (AF) amplifier circuit. This circuit uses cheap 1/4-W resistors, no high precision needed so 5%-tolerance of carbon or metal film units is good enough. This circuit has frequency response range from 16Hz to 30kHz. This amplifier also accepts standard automotive battery supply voltage range: 12 to 14 V. The gain of […]
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