- #1
RhysGM
- 10
- 0
Hello, I have a transistor (BC547B) that is being used as a switch, connected to the base I have an 9v battery and an LDR with a maximum resistance of 1m ohms. However this is still not enough not to switch off the transistor. Can someone tell me how I can work out what resistors I need, so the transistor is on in the light and off in the dark?
Links for the components I'm using;
http://www.rapidonline.com/Electron...468/?sid=b45ead51-5d50-4c3d-9f34-1e06a4f70d0c
http://www.rapidonline.com/Electronic-Components/Light-Dependent-Photoresistor-58-0134
Thanks for any help you can give.
Links for the components I'm using;
http://www.rapidonline.com/Electron...468/?sid=b45ead51-5d50-4c3d-9f34-1e06a4f70d0c
http://www.rapidonline.com/Electronic-Components/Light-Dependent-Photoresistor-58-0134
Thanks for any help you can give.