A simple infrared thermopile sensor circuit diagram is shown underneath. The op amp must be a excellent low-noise unit. We usually make use of the LTC1050 for such purposes, however […]
10 Channel Capacitive Touch Switch Circuit
In this article we are going to construct a capacitive touch switch circuit with 10 channel output, the state of the each channel can be turned ON and OFF sequentially […]
Non-Contact Voltage Detector Circuits Using Transistors and IC
In this post we are going to discuss a few non-contact voltage detector/tester circuits for checking the presence of active mains live wire. We will be understanding what non-contact voltage […]
Thermal Indicator Circuit for Heatsinks
The post details how to build a simple 3 LED thermal indicator circuit for heatsinks and other similar applications to quickly understand the level of heat on the selected surface […]
Simple Temperature Indicator using BC547 Transistor
The post explains a simple temperature indicator circuit using a single BC547 transistor and complementary 1N4148 diode. The temperature indication of a heat sink on a power transistor in high […]
Under Soil Gold Detector Circuit
The article talks about a surprisingly simple under soil gold detector circuit for estimating buried metals like gold, iron, tin, brass etc by detecting alternation in the resistance of the […]