so i built digital sensors for my linefollowing robot. it´s the same schematic as on the picture but i´m not using cny70. it was working fine. on the black line LED was turned off and on white was turned on. since one moment all sensors stoped working properly. on white LED in ON but on black led starts blinking. it’s very fast blinking. i triedd to recalibrate but nothing =(. it worked before so i don’t know what can be problem. can anyone help me, please?
parts that i’m using:
some IR LEDs