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Audio Controlled Mini AC Lamp Flasher Circuit using SCR

Last updated on 13 February 2026 by Admin-Lavi Leave a Comment

This article is about a simple and low cost project, which we call it is an Audio Controlled Mini AC Lamp Flasher circuit using an SCR. It works with audio signal, when music comes the lamp flashes and when sound increases the lamp glows more. So it follows the audio level for this the circuit […]

Filed Under: Audio Circuits, LED and Lamps

Transistor Based Mini Emergency Light Circuit

Last updated on 12 February 2026 by Admin-Lavi Leave a Comment

Electricity failure is common in many areas, so we need backup light. This Transistor Based Mini Emergency Light Circuit is simple and is with low cost. It uses few components only and it works automatically when power fails. Therefore, it is useful for homes and small offices and it is easy to build even for […]

Filed Under: LED and Lamps, Transistor Circuits

6V to 12V Battery Monitor Circuit using CMOS IC 7555

Last updated on 12 February 2026 by Admin-Lavi Leave a Comment

Battery is very important in many electronic projects, but however battery voltage goes down slowly and so device may stop working properly. Therefore, to solve this problem we have built a simple 6V to 12V Battery Monitor Circuit using CMOS IC 7555. This circuit uses IC 7555 timer and it gives indication using an LED, […]

Filed Under: Battery Charger Circuits, Timer Circuits

Switch Mode LED Driver Circuit using Transistors

Last updated on 11 February 2026 by Admin-Lavi Leave a Comment

Nowadays, LED is used everywhere, its used in display, in indicator and for decoration purpose also. But LED needs proper current, so if we connect LED direct to battery then it may get damage. So, in this post we have designed a Switch Mode LED Driver Circuit using Transistors. This circuit is simple as it […]

Filed Under: LED and Lamps, Power Supply Circuits, Transistor Circuits

3V Battery Operated Lamp Flasher Circuit

Last updated on 10 February 2026 by Admin-Lavi Leave a Comment

In this article, we will explain about a simple and easy 3V Battery Operated Lamp Flasher Circuit. It is used to flash a lamp using only 3V supply. Usually, low voltage flashing circuits give low output current. However, this circuit gives high current output and therefore, it can drive a small lamp easily. The heart […]

Filed Under: Battery Charger Circuits, LED and Lamps

LM3909 IC Based Square Wave Generator Circuit

Last updated on 10 February 2026 by Admin-Lavi Leave a Comment

Electronic projects often need a signal source and this signal can be a pulse or square wave. Therefore, a frequency generator is useful for these type of signal source. Here, we have used LM3909 IC which is simple with low power, it works well on small voltage and also the circuit is cheap and easy. […]

Filed Under: Oscillator Circuits

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Recent Posts

  • Audio Controlled Mini AC Lamp Flasher Circuit using SCR
  • Transistor Based Mini Emergency Light Circuit
  • 6V to 12V Battery Monitor Circuit using CMOS IC 7555
  • Switch Mode LED Driver Circuit using Transistors
  • 3V Battery Operated Lamp Flasher Circuit

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