A very simple temperature indicator circuit can be built by interconnecting a single transistor, a diode and a few other passive components. Using Transistor as a Heat Sensor As we know that all semiconductors have this “bad habit” of changing its basic characteristics in response to ambient temperature changes. Especially basic electronic components like transistors […]
New Circuit Projects
433 MHz RF Remote Control Encoder and Decoder Pinouts Explained
In this post I have explained the pinout assignments and functions of the popular 433 MHz RF remote control module from HOLTEK. RF 315 MHz / 433 MHz Transmitter-receiver Module for Remote Control Application Making your own universal remote control systems today is very easy. Such procure the relevant chips, assemble them and here goes, […]
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 […]
3 Accurate Refrigerator Thermostat Circuits – Electronic Solid-State
Interested to make an accurate electronic thermostat for your refrigerator? The 3 unique solid state thermostat designs I have I have explained in this article will surprise you with their “cool” performances. Design#1: Introduction The unit once built and integrated with any relevant appliance will instantly start exhibiting an improved control of the system saving […]
40 watt Electronic Ballast Circuit
The proposed 40 watt electronic ballast is designed to illuminate any 40 watt fluorescent tube, with high efficiency, and optimal brightness. The PCB layout of the proposed electronic fluorescent ballast is also provided along with the torroid and the buffer choke winding details. Introduction Even the promising and the most talked about LED technology is […]
2 Simple Earth Leakage Circuit Breaker (ELCB) Explained
The discussed Earth leakage circuit breaker diagrams will monitor the leakage current level of the earthing line of your house electrical sockets and will trip the appliances as soon a fault is detected. Here I have explained 2 designs, first using transistors only and the second using IC LM324. Introduction If anything goes wrong with […]
