Electronic projects often need a signal source and this signal can be a pulse or square wave. Therefore, a frequency generator is useful for these type of signal source. Here, we have used LM3909 IC which is simple with low power, it works well on small voltage and also the circuit is cheap and easy. […]
One LED Low Voltage Flasher Circuit using IC LM3909
Low voltage indication is very important, especially for battery operated circuits. Because battery can discharge anytime and so a simple indicator is required. Therefore, this One LED Low Voltage Flasher Circuit using IC LM3909 is designed. It uses only one LED and also uses minimum components and moreover, it works on very low voltage. Hence, […]
Simple 3.6V High Power LED Torch Circuit
This article is about Simple 3.6V High Power LED Torch Circuit. It uses a 3.6V battery and is easy to build and the circuit is very easy to understand. The circuit uses only LEDs, one resistor, a switch and a battery. So beginners can also try this circuit and moreover, this circuit gives strong light. […]
Simple Over-Temperature Warning Indicator Circuit
This circuit is for Simple Over-Temperature Warning Indicator Circuit using an LED. It is very simple and is with low cost as it uses few easily available components. The circuit turns ON an LED when temperature rises above a set level like 45°C – 55°C. Therefore, it is useful for basic thermal warning. This circuit […]
Arduino Flash Trigger Circuit with Sound Sensor
Nowadays, electronics projects are becoming very popular, especially Arduino based projects are easy to build, because of this the beginners also feel confident. In this project an Arduino is used to trigger a camera flash, the trigger happens when a sound is detected. So Arduino Flash Trigger Circuit with Sound Sensor is very useful for […]
Solar Cell Based Camera Flash Trigger Circuit
Photography flash units need correct timing. However, many old flash units do not have trigger input, so a Solar Cell Based Camera Flash Trigger Circuit is useful. This circuit is very simple as it uses very few components and also it does not need any battery. The circuit works using light only and when a […]