Tag Archives: PWM

Simple Function Generator

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Simple triangle-wave generators have a weakness in that the waveform of their output signal normally cannot be modified. The circuit presented here makes it possible to smoothly alter the waveform of a linearly rising and steeply trailing saw-tooth signal through a symmetrical triangle-wave to a slowly trailing, steeply rising linear… Read more »

PWM Modulator

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If you ever thought of experimenting with pulse-width modulation, this circuit should get you started nicely. We’ve kept simplicity in mind and used a dual 555 timer, making the circuit a piece of cake. We have even designed a small PCB for this, so building it shouldn’t be a problem… Read more »

Mini Lithium Torch

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This mini pocket torch combines the advantages of Lithium button cells with a super-bright white LED. The lithium cells are small, have a long shelf life and have very little self-discharge. The LED has very high efficiency, an extremely long life expectancy and a modest current consumption (20mA). In combination… Read more »

Small Package Digital PWM Controllers

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Small Package Digital PWM Controllers International Rectifier, IR®, a world leader in power management technology, introduced its highly versatile family of CHiL digital PWM controllers that dramatically shrinks footprint and improves efficiency in a variety of mid-range to high-end and extreme server, desktop, and computing applications. IR’s six new devices… Read more »

PWM 12V DC motor speed regulator

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Reverse engineered circuit diagram of a PWM motor speed regulator out of an oral irrigator water pump. This circuit works quite well, keeping the speed of the small PM motor fairly constant regardless of load. No transistor heatsink is required since this is a switching regulator. The efficiency under high… Read more »