The Sun – Up Relay Switch can be used to provide a audible switch for when the sun comes up. It can also be used to detect a light beam, headlights etc.
This circuit is easy because it used one Transistor 2N2222-2SC945-2SC828-BC549 etc , Relay and Photo transistor Only. The important part of the circuit is very low cost. (I like it)
The photo transistor is very sensitive to light. VR1 for control sensitive of circuit.
Relay used 6V to 9V 600ohm.
Other detail please see to image circuit.
Related Links
Lighting Senser circuit
Light Switch circuit
Relay driver circuit
Relay switch
Photo transistor circuits
Dark Activated switch by IC 741
Audible Light Sensor by IC 741
Light Change Detector by IC CA3130
Dark-Detecting LED
Solar Power walkway marker Led display
Automatic Lamp Control with Light Sensitive Switch
This entry was posted on Thursday, May 1st, 2008 at 8:42 am and is filed under detector, Lighting.
