This is a simple and low-cost Solar Sensor Based Security Alarm Circuit using Transistors which uses a solar sensor for light sensing. The circuit gives alarm sound through the speaker when light level changes and it works mainly when darkness comes or when someone blocks light on the sensor. So we can use this circuit […]
Solar Circuits
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 […]
Automatic Solar LED Light Circuit
Solar power is free energy and it comes from the sun, it is clean and is renewable, because of this solar lights are very popular today; also this is Automatic Solar LED Light Circuit and it turns ON light at night, and it turns OFF light at day automatically. This circuit requires no switch, making […]
Low Cost 1.2V AA Ni-MH Solar Battery Charger Circuit
This project shows about a Low Cost 1.2V AA Ni-MH Solar Battery Charger Circuit, as it works with small cheap solar panel and charges the battery safely in sunlight; also it uses only solar panel, diode, resistors and two transistors. Furthermore, these parts are few which are easy to find and circuit protects battery from […]
Solar Water Pump Circuit using Battery and MOSFET
In my earlier article I showed about solar water pump circuit using relay, that design works, but relay makes clicking sound and relay contacts can burn after long use. So now here is the new version and this project is Solar Water Pump Circuit using Battery and MOSFET instead of relay, as MOSFET has no […]
Solar Water Pump Circuit using Battery and Relay
This project is about Solar Water Pump Circuit using Battery and Relay; it uses one 18V 20W solar panel, two small 12V batteries, one relay and diodes. The circuit can run a 12V DC water pump and battery stores power from solar panel and relay controls when pump run; also it is a very simple […]