Hi All,
I'm having some trouble with a Sharp 2Y0A21 IR sensor and I hope someone can shed some light on it for me. I'm sure this is just a newbee problem, but it's making me crazy!
My entire circuit is more complex, but I tracked my problem down to something very simple:
When I connect (4) AAA Alkaline cells (5.71V) to the (+) and (-) of the sensor and there is no obstruction, the sensor lead reads around 100mV to ground. This is perfect, basically zero volts. When I wave a hand in front of the sensor, the voltage reads between 1V and 4V depending on the distance. Again, perfect!
However, when I connect (2) CR2032 coin cells (5.79V) I get around 1.4V on the sensor lead even with no obstruction.
Can anyone tell me why this would happen? Is there something about the coin cells that causes this result?
TIA, Mike
I'm having some trouble with a Sharp 2Y0A21 IR sensor and I hope someone can shed some light on it for me. I'm sure this is just a newbee problem, but it's making me crazy!
My entire circuit is more complex, but I tracked my problem down to something very simple:
When I connect (4) AAA Alkaline cells (5.71V) to the (+) and (-) of the sensor and there is no obstruction, the sensor lead reads around 100mV to ground. This is perfect, basically zero volts. When I wave a hand in front of the sensor, the voltage reads between 1V and 4V depending on the distance. Again, perfect!
However, when I connect (2) CR2032 coin cells (5.79V) I get around 1.4V on the sensor lead even with no obstruction.
Can anyone tell me why this would happen? Is there something about the coin cells that causes this result?
TIA, Mike