Introduction to DC Circuits Lab

Suppose that you have a piece of electronic equipment and its battery source that must be separated by a considerable distance, For instance, your remote operated vehicle may have a tether that is anywhere from hundreds to thousands of feet in length. We must interconnect the two locations with electrical cabling.

Assumptions:
1. Load is rated to consume 0.144W when supplied 12V.
2. Load will operate properly as long as the voltage across its greater than 11V.
3. Battery voltage will remain constant at 12V (an approximation) and that the battery has a capacity of 0.8 Ahr.

Our problem to determine:
1. The maximum resistance the cable may have for the load to still be able to function.
2. The maximum distance the battery and the load can be separated if we use AWG #30 cable.
3. The distribution efficiency
4. The approximate time before the battery completely discharges.

The actual voltage of the battery was 11.90V

The fully built circuit