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Newly Updated Circuit Projects:

How to Calculate Solar Panel, Inverter, Battery Parameters

Last Updated on May 17, 2026 by Swagatam 171 Comments

Grid Tie Inverter2C Wiring Details2C Diagram

In this post I have explained through calculations how to select and interface the solar panel, inverter and charger controller combinations correctly, for acquiring the most optimal results from the set up. Calculating Solar Panel, Inverter and Battery Charger Specifications For the sake of convenience, let’s believe you possess a a 100 watt appliance or […]

Filed Under: Battery Charger Circuits, Inverter Circuits, Solar Controller Circuits Tagged With: Battery, Calculate, Inverter, Panel, Parameters, Solar

Car Speed Limit Warning Indicator Circuit

Last Updated on June 1, 2026 by Swagatam 30 Comments

carspeedlimitindicatorcircuit

In the following post I have explained a simple yet useful car speed limit warning indicator circuit which can be used in vehicles for getting an instant indication of a possible over speed limit conditions. The idea was requested by Mr. Abu-Hafss. Technical Specifications: Shall appreciate, if you could design a circuit to warn with […]

Filed Under: Automobile Electronics, Indicator Circuits Tagged With: Indicator, Limit, Speed, Warning

High Current 209A, 75V MOSFET IRFP2907 Datasheet

Last Updated on June 30, 2026 by Swagatam 23 Comments

irfp2907datasheet

In this post I have explained the main features datasheet of high current N-Channel mosfet IRFP2907 which is rated to handle up to a staggering 209 amps of continuous current at a reasonably massive 75 volts. High Current Specs With the advent of mosfets, switching huge power through compact packages has become particularly feasible. Take […]

Filed Under: Datasheets and Components Tagged With: Current, Datasheet, High, IRFP2907, MOSFET

Low Battery Indicator Circuit Using Two Transistors Only

Last Updated on August 3, 2026 by Swagatam 211 Comments

lowbatteryindicatorcircuit 2

In the following post I have explained a simple low battery indicator circuit by using just two inexpensive NPN transistors. The main feature of this circuit is its very low stand by current consumption. The Circuit Concept We have so far seen how to make a low battery indicator circuits using a 741 IC and […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Indicator, Only, Transistors

Long Range Transmitter Circuit – 2 to 5 Km Range

Last Updated on February 1, 2020 by Swagatam 179 Comments

DSC 0143

The proposed long range transmitter circuit really is very steady, harmonic free design which you can use with standard fm frequencies between 88 and 108 MHz. Technical Specifications of the Transmitter This will likely encompass 5km spectrum (long range). It includes an extremely consistent oscillator for the reason that you employ LM7809 stabilizer that is […]

Filed Under: Wireless Circuits Tagged With: Long, Range, Transmitter

Stereo FM Transmitter Circuit using IC BA1404

Last Updated on October 6, 2019 by Swagatam 52 Comments

stereofmtransmittercircuit

The following posts explains how to build a simple to build FM stereo transmitter circuit using IC BA1404. About the IC BA1404 An exceptional stereo audio FM wireless transmitter circuit is presented below. The circuit relies upon the IC BA1404 from ROHM Semiconductors. BA1404 is a monolithic FM stereo modulator which includes integrated stereo modulator, […]

Filed Under: Wireless Circuits Tagged With: BA1404, FM, Stereo, Transmitter

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