i have prepared a sensor circuit for my robot(pairs of IR led and photo-transistor).
i have used a series resistance of 100 ohms with led.
i have put 10k ohms as collector resistance.
the sensitivity of the circuit is excellent.
Now the problem is,the battery which i used for testing was getting drained too fast(i have attached the image of the battery that i used).when i checked the voltage across the output of the last transistor the voltage dropped to 3.7v ,where as i expected it to be well above 4.5v.(5v vcc for the sensor circuit)
for my robot i am using 2 bipolar steppers, i have planned to use 10 nimh batteries(2100mah)as battery source.will this combination be able to drive both my stepper and sensor circuit