In this article I have explained a simple low battery indicator circuit using the IC 555 and a few resistors only. Circuit Concept Many electronic circuits such as emergency lights, battery chargers, UPS systems, flashlights etc essentially require a low battery indication feature in order to avoid over discharge of the involved battery. An over discharge could mean a permanent damage […]
Battery
Recovering Electrical Energy from Alternator and Battery
A request was sent to me by one of the readers Mr. Edward Pizzo, regarding solving a circuit issue. The idea refers to a very interesting concept of acquiring free energy through a mechanism which once initiated keeps running in quite a perpetual fashion. Using an Alternator and two Batteries A charged battery #1 is used initially for […]
Charging Battery with Piezo Mat Circuit
In this post I have explained a method to harvest free electricity from a piezo embedded mat by walking on it, and try to investigate how this energy may be used for charging a small battery. Normally a human body carries a huge amount of energy which simply gets wasted in our regular day to […]
Emergency LED Lamp Circuit with Battery Overcharge Protection
The following LED emergency light with battery over charge protection feature circuit was designed by me in response to the request sent by PP. Main Features In this article I have explained an LED emergency light circuit with advanced features such as, Using Transistors only The following design of the proposed day/night automatic emergency LED […]
Battery Voltage Monitor Circuits using LM324 and LM3915 ICs
The post describes simple battery charge monitor circuits or battery status indicator circuits using 4 LEDs to 10 LEDs, and using ICs like LM324 and LM3915. The first design is a 4 LED voltage monitor circuit using the versatile IC LM324. The idea was requested by Ms. Piyali. Technical Specifications I’ve a project, if you […]
IC 741 Low Battery Indicator Circuit
The proposed circuit was requested by one of the avid readers of my blog. It is a low battery warning indicator circuit using op amp IC 741 and can be used for monitoring a particular low battery voltage threshold. Circuit Operation The circuit may be understood with the following points: The entire configuration is wired […]