Simple Tilt Sensor Switch Circuit control ON/OFF of LED or buzzer. Tilt sensor work like small seesaw switch. Inside a sensor there can be a small metal ball. When sensor stand straight the ball touch two points and then the current can pass. When sensor tilts the ball move away and the current stops. This […]
Simple Door Keyhole Light Circuit
When ON, small device like Simple Door Keyhole Light Circuit gives light to keyhole. It helps to put key in hole when light is low. It uses light sensor and circuit to check light level. To switch it by light we used transistor and LDR. Circuit Working: Parts List: Category Item Quantity Resistors 47k 1/4 […]
Simple Footstep Electricity Generator Circuit using Piezo Transducer
Piezoelectric transducer are used in footstep power circuit. It changes foot pressure into small electric power. Piezoelectric effect means crystal which makes electricity when press or stress happen. If we press special crystal a small current comes out. Simple Footstep Electricity Generator Circuit uses parts like piezo transducer, bridge rectifier, capacitor, resistor and LED. Circuit […]
Simple Crowbar Circuit
Simple Crowbar Circuit is safety part in electronics. It protect from high voltage spike or surge. Work like fuse but does not burns and it gets short circuit fast to stop damage. It use SCR or TRIAC for shorting, transistor or Zener to trigger. Trigger watch voltage all time. If voltage is too high then […]
24V Flasher Circuit
24V Flasher Circuit can ON-OFF 24V thing like lightbulb again and again. Can use to turn signal or warning flash light. This circuit uses IC 555 is common for making timer or flasher. We can change flash speed by adding resistor and capacitor to IC 555. This way is not so flexible but easy. Also […]
Simple Solenoid Driver Circuit
A Simple Solenoid Driver Circuit is a setup to control solenoid using low voltage signal. Solenoids are like magnets and they change electric power into movement. They need more voltage than small digital parts like microcontrollers can give. The driver works like a switch and it lets small signal turn big current ON and OFF […]