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Newly Updated Circuit Projects:

Temperature Controller Circuit for Reptile Racks

Last Updated on July 20, 2019 by Swagatam Leave a Comment

simple temperature controller circuit

The following article discusses a temperature controller circuit which can be used for controlling the temperature inside reptile racks. The idea was requested by Mr. Tom. Technical Specifications I’m looking to make a circuit to use to heat my reptile rack, I really like your incubator circuit, but do not have the electronics expertise to change it to suit […]

Filed Under: Temperature Controllers Tagged With: Controller, Racks, Reptile, Temperature

12V 5 Amp Fixed Voltage Regulator IC 78H12A Datasheet

Last Updated on June 30, 2026 by Swagatam 66 Comments

78h12a pinout diagram

The post explains the technical specifications, datasheet, and application notes of the IC 78H12A which is a voltage regulator IC capable of providing a fixed regulated 12V output at maximum 5 amp current. 5 Amp Regulator Specifications We are familiar with the popular 78XX ICs such as the 7812 IC which can produce 12V fixed voltage at […]

Filed Under: Datasheets and Components Tagged With: 12V, 78H12A, Datasheet, Fixed, Regulator, Voltage

Pellet Burner Controller Circuit

Last Updated on April 12, 2019 by Swagatam 6 Comments

pelletburnertimercontrollercircuit

In this post I have explained a programmable sequential timer with controller circuit which may be used for automatically controlling a homemade pellet burner/boiler system. The circuit was requested by Mr. Vasilis. Technical Specifications I have used your circuit on my homemade pellet burner that uses a 12V Ac motor for the feeder screw running […]

Filed Under: Temperature Controllers Tagged With: Burner, Controller, Pellet

Automatic Micro UPS Circuit

Last Updated on March 22, 2025 by Swagatam 230 Comments

microupscircuit 1 1

The following article discusses a simple automatic micro UPS circuit which can be used with modems for acquiring uninterrupted power from a DC source, and battery during mains power failures. The circuit also incorporates an automatic over charge cut off, and a low battery indication feature. The circuit was requested by Mr. Kapil Goel. Technical […]

Filed Under: Inverter Circuits Tagged With: Automatic, Micro, UPS

Solar Water Heater Circuit with Battery Charger

Last Updated on May 17, 2026 by Swagatam 24 Comments

water2Bheater

The proposed solar water heater with battery charger controller circuit explains a simple method of utilizing the excess solar energy from a solar panel for heating water in water tanks or swimming pools or poultry egg chambers. Normally the circuit also functions like an automatic solar battery charger, and simultaneously powers domestic electrical appliances. Understanding Solar Charging […]

Filed Under: Battery Charger Circuits, Solar Controller Circuits Tagged With: Battery, Charger, Heater, Solar, Water

Universal H-Bridge Circuit Module

Last Updated on March 23, 2025 by Swagatam 103 Comments

In this article I will elucidate a simple universal H-bridge module using BJTs and N-channel MOSFETs. This module can be integrated with any standard oscillator ICs such as IC 4047 or IC SG3525 or even IC 555, to create a highly efficient H-bridge inverter circuits. Why using 4 N-channel MOSFET H-Bridge is the Most Efficient […]

Filed Under: Inverter Circuits Tagged With: Bridge, Module, Universal

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