These are four light sensor alarm circuits, when be become dark, or Light sensitive switch.Use part is important light sensor LDR light dependent resistor [...]
The Battery full charge alarm circuit for a general battery charger. It is simplified circuit and cheap, use one transistor BC557 and display with 2 LED.
This is Simple Solar light alarm circuit with the special edition, that improve this circuit whole new to higher efficiency. use solar cell instead of LDR
This is Morning sun alarm circuit using IC-4011 that hobby It will have sound alarm when morning like a normal clock alarm with lighting sensor same clock.
With light change! Light Change Detector Circuit using CA3130 This the Secretariat of the Swith light high-quality circuit. By prominent its point is when the light changes the system will…