Urahara
Member
Hi
I have a light to frequency light sensor (TSL230R) connected via a short wire (max 12 inches) to the capture pin of a pic microcontroller. This sensor generates a square wave that increases with the light level. The aim is to count the rising edge (pulse) of the square waves per minute to determine the light level.
When I use a breadboard for the whole circuit (pic and sensor on separate breadboard), I can get up to about 60,000 pulses per min whenever I shine a touchlight on the sensor. But with the pic on a "self-designed" PCB and the sensor on the breadboard, I got max 2600 pulses per min.
I have included decoupling capacitors, use short pic to sensor wire but to no avail. I guess my limited knowledge of electronics is catching up with me.
Any ideas would could be the cause of this problem?
Thks!
I have a light to frequency light sensor (TSL230R) connected via a short wire (max 12 inches) to the capture pin of a pic microcontroller. This sensor generates a square wave that increases with the light level. The aim is to count the rising edge (pulse) of the square waves per minute to determine the light level.
When I use a breadboard for the whole circuit (pic and sensor on separate breadboard), I can get up to about 60,000 pulses per min whenever I shine a touchlight on the sensor. But with the pic on a "self-designed" PCB and the sensor on the breadboard, I got max 2600 pulses per min.
I have included decoupling capacitors, use short pic to sensor wire but to no avail. I guess my limited knowledge of electronics is catching up with me.
Any ideas would could be the cause of this problem?
Thks!
