Voltage Level Monitoring Circuit using IC LM339 very important in modern electronics, as it helps system work correct. To see voltage in real time we need to use voltage level readout circuit. This circuit uses LM339 comparator IC for accurate voltage check and stable reading. Main parts are LEDs that show voltage level and resistors […]
Indicator Circuits
Simple Heartbeat Monitor Circuit using Arduino
In this post we will show how to make Simple Heartbeat Monitor Circuit using Arduino. When we put finger on sensor it count heartbeats per minute. This is important because heartbeat tells doctor about our health. We use Arduino UNO, LCD screen, two buttons, one resistor and heartbeat sensor to build it. Sensor catches heartbeat […]
Interfacing a 7-Segment Display Circuit with Arduino UNO
Interfacing a 7-Segment Display Circuit with Arduino UNO is small electric part which shows numbers. It have 7 LEDs inside and makes shapes for numbers and some letters. We can connect it to Arduino and then it tells what number to show. This article teaches how to connect 7-segment to Arduino UNO and show numbers. […]
Battery Status Indicator Circuit using Flashing LED
Battery Status Indicator Circuit using Flashing LED is an easy to make project. Circuit uses BC547 and BC557 transistor, some resistors, capacitors, one diode and one LED. LED show battery condition by blinking light. It work with 6 to 12V battery and it is easy way to know battery health and it ensures it works […]
Simple Audio Level Indicator Circuit using IC LM3915
Simple Audio Level Indicator Circuit using IC LM3915 show sound strength with lights. Its display driver is good for sound visual circuits. It takes analog voltage and can light up 10 LEDs, LCDs or other displays in line. Here LED VU meter is used. Music lovers like it because it show sound level with lights. […]
Simple Decimal Counter Circuit
In this article for Simple Decimal Counter Circuit instead of count in binary (0 to 1) the decimal counter count in base is 10 (0 to 9). One simple and main way to make it: Use Decade Counter IC which is good for beginners. The IC like 4017 is easy to find and can already […]