Voltage Regulator Current

Calculate I sourced by the voltage regulator LM7805C for all 5V loads

The voltage regulator can source a max of 1A. We are using a total of 0.308mA.

Servo

We placed a low resistor in series with the running servo and scoped the V_peak-to-peak.

= 14mA

7 Tape Sensors

The diode is always on. V_f = 1.70V (from datasheet)

Scoped the I through the 10K resistor = 0.4mA

I through the voltage divider

Supply current thru the LM324 = 3mA (datasheet)

BJT onstate collector current = 3mA (datasheet)

I_total = 7(33mA + 3mA +3mA + 0.4mA) + 2.5mA = 278.3mA for 7 tape sensors

LEDs

Arm board yellow debug LED

= 1.4mA

Main E128 board red debug LED

= 1.4mA

Power board red debug LED

= 0.14mA

Power board green debug LED

= 0.096mA

Red Indicator LED

= 6.46mA

Green Indicator LED

= 6.46mA

Bumper Limit Switch

0.05mA * 2 = 0.1mA for 2 bumper limit switches