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1500 watt PWM Sinewave Inverter Circuit

SPWM 1500 watt inverter circuit

A vey basic yet reasonably efficient 1500W PWM based sinewwave inverter circuit can be studied under this post. The design utilizes very ordinary parts to accomplish a powerful SPWM type inverter circuit. Main Specifications Power Output: Adjustable from 500 watts to 1500 watts Output Voltage: 120V or 220V as per the transformer specs Output Frequency: … Read more1500 watt PWM Sinewave Inverter Circuit

3D Moon-Sphere LED Driver with Charger and Dimmer Circuit

In this post we learn how to build a homemade LED driver with dimmer and charger circuit for illuminating a 3D moon from a 5V USB source. The idea was requested by Mr. John Sweden. Circuit Objectives and Requirements I’ve been a visitor to your website for many years and wonder if I may ask … Read more3D Moon-Sphere LED Driver with Charger and Dimmer Circuit

Patient Drip Empty Warning Indicator Circuit

In this post we will learn about a simple mechanism, and a circuit which will enable a patient’s IV drip bottle system to sound an alarm whenever it gets almost empty, and needs a replacement. The warning circuit will help doctors and the concerned employees to concentrate on other important matters while the drip systems … Read morePatient Drip Empty Warning Indicator Circuit

Using TSOP17XX Sensors with Customized Frequencies

We know that the center or band-pass operating frequency of a TSOP17XX IR sensor is assigned to a particular frequency which makes it difficult to use these sensors for designing unique or customized frequency based remote control circuits. In this post we will try to figure out an idea for enabling these sensors to work … Read moreUsing TSOP17XX Sensors with Customized Frequencies

Driving Unipolar Stepper Motor using IC 555 Timer

4.7K or 4k7 Resistor

In this project we are going to run a unipolar stepper motor using 555 timer. Apart from 555 timer we also need IC CD 4017 which is a decade counter IC. By Ankit Negi Any unipolar motor can be connected to this circuit for performing specific task, though you need to do some small changes … Read moreDriving Unipolar Stepper Motor using IC 555 Timer

PIR Triggered Message Player Circuit

In this post we diagnose a PIR activated message player circuit, which was sent by Mr. Norman Kelley one of the dedicated followers of this blog for improvements. Let’s learn more about the design through the following discussions. Triggering Message Playback with a PIR Input I have been working on a project for about a … Read morePIR Triggered Message Player Circuit

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