# Output Devices¶

## Group assignment requirements¶

The group assignment for this week is the following: - Measure the power consumption of an output device.
- Document your work on the group work page and reflect on your individual page what you learned.

## DC Power Supply specs¶

A bench power supply is a device that converts Alternating Current (AC) to direct current (DC). Using the power supply gives a stable output power where we can control the output voltage and set a limit of the maximum current the device powered can draw. Which makes it ideal to measure the power consumption since it gives an indication of voltage and current used.

Power supply used: (UNI-T UDP3305S-E)
Number of output channels: (4-Channel)
Maximum voltage: (30 Volt)
Maximum current: (5-Amp)
Current measurement accuracy (if available): (1-mAmp)

## Output device 1¶

For this group assignment, the first output device measured is a [DC Motor] - (NF113LG-011).

A direct current Motor which converts electrical signals into kinetic energy (movement).

datasheet

According to the datasheet, this device works with a voltage range of [12]V. We powered it using the power supply with a set voltage of [10]v and it was drawing a current of [0.9]mA –> (No-Load)

Power in Watts = Current in Amps X Voltage in Volts Power = [0.09]A X [10]V = [0.9]W

The Power consumption per hours in watt-hour (Wh) is = [0.9]Wh

• When the motor is stalled this is how it will acts.

• The motor will drop in voltage and try to compensate with current.

In DC Motor the speed is voltage proportional and torque is current proportional.

• This also happens when the motor is switched on, It will take current to rotate the rotor at the beginning

## Output device 2¶

the second output device measured is a [Blue LED].

Light Emitting diode which provide light when it has a potential difference across its leads.

datasheet

According to the datasheet, this device works with a voltage range of [3.2-4]V. We powered it using the power supply with a set voltage of [3.3]v and it was drawing a current of [20]mA

Power in Watts = Current in Amps X Voltage in Volts Power = [0.020]A X [3.16]V = [0.06]W

The Power consumption per hours in watt-hour (Wh) is = [0.06]Wh