In one of our earlier article, we learned how to build automatic street light circuits using single and double transistors, an IC 555 timer and a solar panel configuration. Today we are going to investigate another design from our collection which uses famous IC 741 operational amplifier as a precision voltage comparator. If you are […]
741
Op amp IC 741 Datasheet, Pinout, Applications
The 741 is a popular general-purpose operational amplifier (op-amp) IC that was introduced by Fairchild Semiconductor in 1968. It has since become one of the most widely used op-amp ICs in the world, due to its versatility and low cost. Below is a typical datasheet for the IC 741: General Specifications: Pinout Configuration: The pinout […]
Power Amplifier Circuit using IC 741 and MOSFET
In this post we study a power amplifier design configured using an ordinary IC 741 and a couple of MOSFETs. An operational amplifier’s output power such as from an IC 741 can be typically enhanced when a complementary emitter follower transistor is coupled at its output. The same could also generally be accomplished using a […]
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 […]
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 […]
How to Set IC 741 for Auto Cut-oFF
In this post I have explained 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 […]