Hi all,
Need a bit of help on a project I have. We're trying to create a colour detecting circuit that, using a 5V power supply and an LDR will turn on a red, yellow or green light, dependent on which colour is shining on the LDR. We have measured the resistance created by the LDR with the different lights but need to establish how to effectively pair that with a circuit similar to a dark sensor. We have the dark sensor circuit working effectively but I personally am having trouble on how to piggy back that in a way to filter the current based on the LDR resistance. Any and all help will be greatly appreciated.
These are the components we have at our disposal:
1. Light Emitting Diodes (LED)
2. Light Detecting Resistors (LDR)
3. Zener diodes
4. Resistors
5. Mechanical switches
6. Double Pole Single Throw (DPST) relay (switch)
7. Single Pole Single Throw (SPST) relay
8. NPN/PNP – Transistors
9. Breadboard
Thank you!
Need a bit of help on a project I have. We're trying to create a colour detecting circuit that, using a 5V power supply and an LDR will turn on a red, yellow or green light, dependent on which colour is shining on the LDR. We have measured the resistance created by the LDR with the different lights but need to establish how to effectively pair that with a circuit similar to a dark sensor. We have the dark sensor circuit working effectively but I personally am having trouble on how to piggy back that in a way to filter the current based on the LDR resistance. Any and all help will be greatly appreciated.
These are the components we have at our disposal:
1. Light Emitting Diodes (LED)
2. Light Detecting Resistors (LDR)
3. Zener diodes
4. Resistors
5. Mechanical switches
6. Double Pole Single Throw (DPST) relay (switch)
7. Single Pole Single Throw (SPST) relay
8. NPN/PNP – Transistors
9. Breadboard
Thank you!