100 watt LED Driver Circuit

The article shows a 32V, 3 amp SMPS circuit which may be particularly utilized for driving 100 watt LED modules, appraised with the same specs. The circuit of the proposed 32 V, 3 amp smps LED driver may be comprehended with the assistance of the accompanying focuses: The mains voltage is redressed and separated by the extension […]

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Thermostat Circuit for 1KW Space Heater using SCRs

The following is a SCR controlled space warmer circuit manufactured in 2001 which as of late got to be discontinuous so I chose to supplant it with the more straightforward strong state hand-off circuit above. Likewise, SCRs are much less expensive than strong state transfers which keep running about $40 for the 25 amp units. […]

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Fading Red Eye Circuit

This circuit is utilized to gradually light up and blur a couple of red LEDs (light radiating diodes). The fading LEDs could be introduced as “eyes” in a little pumpkin or skull as a Halloween fascination, then again mounted in a Christmas tree adornment.   On the other hand, they may be utilized as an […]

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1.5V LED Flasher Circuit

The LED flasher circuits beneath work on a solitary 1.5 volt battery. The upper circuit, shows utilizing a 100uF capacitor to twofold the battery voltage to get 3 volts for the LED. Two segments of a 74HC04 hex inverter are utilized as a squarewave oscillator that builds up the glimmer rate while a third segment […]

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40 LED Bicycle Light Circuit

A simple bicycle flashing light circuit using LED arrays is explained below. Designed by me. The 555 circuit design below is a blinking bike light, activated with 4 C,D or AA cells (6 volts). A couple of arrays of 20 LEDs is assigned to alternately blink at around 4.7 flashes per second by employing RC […]

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Light Operated Relay Circuit

In this post you will learn about a very simple light activated relay circuit in which a relay is toggled On/OFF in response to the light or darkness over a photo sensitive device, the circuit utilizes only a Darlington transistor for activating the relay The light sensitive relay circuit presented here has been configured such […]

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Marker Generator Circuit

The marker generator circuit explained here is a constant- frequencyoscillator driving into a CMOS divider chain. Switchable out- puts from the divider chain are selected to drive a pulse generator. The oscillator is C1a in which R1 biases the IC into linear operation. The crystal determines the basic frequency of operation at 4 MHz in […]

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Theremin Circuit

This is the only musical instrument known to the writer that is played without being touched! The Theremin is named after Professor Theremin who, in 1928, amazed New York audiences when he demonstrated his ability “to obtain music from the ether”. The instrument has two rods protruding from its housing, each one forming one ‘plate’ […]

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Precision Rectifier Circuit

The post explains a simple precision rectifier circuit using just two opamps. This precision rectifier operates from an asymmetrical supply, handles input signals up to 3 Vpp and has a frequency range that extends from DC to about 2 kHz. Its amplification is unity, and depends mainly on the ratio R4/R3. Opamp A1 is connected […]

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