Dome Lamp Dimmer
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Color Sensor from a Reversed LED and Op Amp
One of the first lessons that electronics students learn is that an LED emits light when current flows through it. However, it is also true that when an LED is connected in reverse, it can generate a current flow when...
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The circuit drives the light-emitting diode in a digital display configuration. The count signal is fed into the ICM7217 chip, which processes the count and subsequently drives the digital display board. The connection between the thumbwheel switches is illustrated in...
Model Theatre Lighting Dimmer
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This circuit design incorporates a dimmer functionality specifically tailored for a...
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The keyer dimmer table lamp utilizes two touch buttons to adjust the light intensity. When one button is touched, the light dims from a strong brightness, while the other button increases the brightness from a dim state. The working principle...
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After constructing a Pulse Width Modulator for high-power LEDs, another LED modulator was developed for an optical transceiver. This project utilized a different approach, focusing solely on linear techniques for audio modulation. Similar to the PWM circuit, this circuit employs...
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This simple circuit converts a 5V PWM signal into a variable precision reference voltage with a range of -2.5V to +2.5V. Many designs, such as a digitally controlled power supply or a programmable dummy load, require a Digital to Analog...