Problem with sensors o/p vol

[saba_rish91]

Hello,

I built a line follower with five QRD113 IR sensor(Analog) and Arduino UNO. I'm using LiPO 7.4v battery to power all my circuits. When at-least one of the sensor is in black line, I get some reading from my sensors properly, but when all the sensors are in white background,  I don't get any reading from my sensors.
I checked using serial monitor. When all the sensors are in white, UNO doesn't read anything. Is it problem with the powe supply are some else?


Thank you.

[waltr]

Are you measuring the sensor outputs with a Voltmeter? or with the UNO's ADCs?

UNO doesn't read anything

What does this mean? The UNO doesn't even do an ADC conversions? or the UNO code is not sending a value to the serial output?

I'm not familiar with the QRD113 IR sensors. Please post a link to the data sheet.
A sketch of the sensor connection to the UNO may also help.

It could be a power supply problem. Have you measured the PS while in the 'fault' condition? Is the UNO still running?