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How to Set IC 741 for Auto Cut-oFF

The post explains how to set or adjust an opamp 741 IC based battery charger circuit for implementing an automatic cut-off for the connected battery once it reaches the full-charge level. Since I have many such IC 741 battery charger circuits posted here, the instructions will be helpful for correctly setting up most of those … Read moreHow to Set IC 741 for Auto Cut-oFF

How to Make a Soil Moisture Tester Circuit with a Single IC 741

A very simple mud or soil moisture tester circuit can be built by using a single opamp and a few passive components, let’s learn the details through the following article. Circuit Objective After water and sunlight the earth or the soil is the next most important natural gift that this planet has provided us with, … Read moreHow to Make a Soil Moisture Tester Circuit with a Single IC 741

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 opamp 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: 1) The entire configuration is wired … Read moreIC 741 Low Battery Indicator Circuit

Simple Bedroom Lamp Timer Circuit Using IC 741

A simple automatic bedroom lamp timer circuit has been described here to switch off your bedroom lamp after a fixed predetermined time. The use of the reliable 741 IC makes the circuit very easy to build and moreover very accurate. Introduction The circuit of an automatic bedroom lamp timer presented here is super easy to … Read moreSimple Bedroom Lamp Timer Circuit Using IC 741

Make a Workbench Multimeter With the IC 741

Testing and troubleshooting electronic project circuits requires a multimeter, so new hobbyists may feel interested to try the following homemade multimeter circuits as their next electronic project. Using a Single Opamp 741 The few opamp based meter circuits such as Ohmmeter, voltmeter, ammeter are discussed below using the IC 741 and just a few other … Read moreMake a Workbench Multimeter With the IC 741

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