numbskull100
New Member
I have built the circuit as per picture below.
I have used the components specified other than the IR LED and Sensor (both of which I have tested elsewhere and are functioning). The parts I have used instead are: **broken link removed** and Sensor **broken link removed**.
When the 12v power is on, the red LED is always on, regardless of the detection by the sensor.
I have tried the following...
Short the sensor - LED stays on.
Remove connection to base of the transistor (I assumed this at least would kill the light) - LED stays on.
Puzzled... Can anybody shed some light on this?
Thanks in advance....
**broken link removed**
I have used the components specified other than the IR LED and Sensor (both of which I have tested elsewhere and are functioning). The parts I have used instead are: **broken link removed** and Sensor **broken link removed**.
When the 12v power is on, the red LED is always on, regardless of the detection by the sensor.
I have tried the following...
Short the sensor - LED stays on.
Remove connection to base of the transistor (I assumed this at least would kill the light) - LED stays on.
Puzzled... Can anybody shed some light on this?
Thanks in advance....
**broken link removed**