Metered Power Supply for a Laser Diode


As in this episode we will be testing out the metered power supply unit we got from eBay which allows for adjustment of the output voltage and also provides a measure of the current draw. Also the meter does not flash as you see in the video, it is cased by the frame rate of the camera.



Module Properties: non-isolated step-down module
Rectification: Non-Synchronous Rectification
Input voltage: 5V-30V
Output voltage: 0.8V-29V
Output Current: 5A (over 3A should enhance heat dissipation)
Conversion efficiency: 95% Maximum
Switching frequency: 300KHz
Output ripple: 50mV (max) 20M Bandwidth
Load regulation: ± 0.5%
Voltage regulation: ± 2.5%
Working temperature: -40 ℃ to +85 ℃
Size: 51 * 26.3 * 14 (L * W * H) (mm)
Features of Meters:
Module Name: current and voltage meter
Accuracy: 0.1%
Refresh rate: about 200ms time
Display: Dual 4 0.28 “digital tube
Current Range: 0A-5A
Voltage Range: 5V-30V
Operating current: less than 15mA
Display color: red
Storage temperature: -10 ℃ to +65 ℃
Input impedance: 50 milliohms
Size: 51 * 26.3 * 10mm