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 […]
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Simple 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, I have explained 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 […]
IC 741 Power Supply Circuits
In this post I have explained how to make simple yet fully stabilized and regulated, variable power supply circuits using the IC 741 op amp. Three versions of the 741 power supplies are I have explained below: Simple Variable IC 741 Power Supply The first figure below exhibits a IC 741 based simple variable voltage […]
AC Millivolts Meter Circuit Using IC 741
In this article we study an op amp based millivolt meter circuit designed to measure AC millivolts accurately, I have explained the details from the following explanation. The circuit shown below can be used to measure DC potentials in the range of milli-volts. The circuit is highly sensitive and is calibrated to measure voltages in […]
Comparator Circuits using IC 741, IC 311, IC 339
The basic function of a comparator circuit to compare two voltage levels at its input pins and produce an output to show which input voltage has higher potential than the other. In this article we will elaborately learn how to correctly design comparator circuits using popular ICs like IC 741, IC 311 and IC LM339 […]