In this article I will explain a simple curtain controller circuit designed by me which can be used to control the opening and closing of a curtain through a remote control. Overview Referring to the circuit diagram in your screen, we can see there are just two relays employed for implementing a remote controlled opening […]
New Circuit Projects
Convert any H-Bridge Inverter to Sine Wave H-bridge Inverter
In this post we’ll discuss how to convert any ordinary square wave H-bridge inverter into an almost pure sine wave inverter circuit. Basic Concept The idea is simple, just chop the low side MOSFET gates of the H-Bridge with reverse SPWM (Sinusoidal Pulse Width Modulation) waveform. This will force the low side 50 Hz, or […]
Pump Motor Timer Circuit with Dry Run Protection
In this post I have explained about a circuit which can be used to monitor and detect the presence of municipal water supply by operating a pump motor through an intermittent ON/OFF timer. The timer keeps the pump motor ON for 15 seconds, if water is not detected, the pump is switched OFF for the […]
Automatic Door Controller Circuit using a Single Push-Button
This door controller circuit works in this way: Initially the door is in the closed state. When a push button is pressed, the door begins opening until it reaches the end of the course. When it reaches the end, it automatically reverses its direction and now the door begins closing. It keeps moving until it […]
Unijunction Transistor (UJT) 2N2646 Datasheet
The 2N2646 is a type of Unijunction Transistor (UJT), which is commonly used in various oscillator based electronic circuit application. The following paragraphs provide the datasheet and the main specifications of the device: Pin Configuration: The following diagram shows the pinout configuration of the UJT 2N2646. General Characteristics: Electrical Specifications: Advantages and Disadvantages Common Applications […]
IC LM358 Datasheet and Specifications
In this post you will find the complete datasheet, pinout specifications of the IC LM358. This datasheet is written in simple language so that even the new hobbyists are able to grasp the technical details of the IC quickly. The IC LM358B offers two high-voltage (36V) amplifiers in a single chip making them cost-effective for […]
