Simple Diode Over-Temperature Indicator (LED)
Let’s experiment with a simple over-temperature indicator circuit using the 1N4148 diode as a sensor and transistors to drive an LED. Read more
Measurement
Meters & Detectors
Designing a DIY Precision Milliohmmeter Circuit using TDA3140
Let’s design a milliohmmeter circuit to measure low resistance values. It allows us to learn about basic electronics by designing circuit. Read more
ICL7106 Analog-to-Digital Converter with Meter Circuit
Let’s learn about the ICL7106 3½ digit A/D converter with LCD driver pinout and features, then use it to build simple digital meter circuit. Read more
LED VU Meter Circuit Using Transistors or IC
Here are some LED VU meter circuit using transistors or ICs with PCB. They show the signal amplitude from an amplifier using 4 to 40 LEDs. Read more
Simple Level Voltage Detector Circuit Using LM741
We will be talking about the simple voltage level detector circuit. Its main purpose is to detect if the voltage rises above a certain point. Read more