Voltlog #131 – Measuring The Efficiency Of The Ruideng Kis3r33S DC-DC Converter

You might remember this small module from the previous InTheMail, this is the Ruideng dc-dc converter with a claimed efficiency of 95%. Now a figure of 95% efficiency is not unheard of these days, many dc-dc converters can achieve this with proper circuit design.

This particular model uses the MP2307 converter chip manufactured by Monolithic Power and if we take a look at their datasheet we can immediately see where they got the 95% efficiency figure they advertise.

If you own fancy equipment like a source/measure unit than one instrument can do all the measurements and data log the results as well but a source/measure is out of our budget so we will be using multimeters for this test.

Here are links where you can find the equipment used in this video:

Voltlog #50 – InTheMail

A new InTheMail video because mail items have been constantly coming in. I hope you’ll find it interesting and if that’s the case, hit that like button so I know you like this kind of video.

Here is a list of items shown in this video:

  • DC-DC Adjustable Step-Down Module with LCD
  • OLED Panel Meter 0-33V 0-3A
  • PWM DC Motor Speed Control
  • BQ24650 MPPT Solar Panel Lithium Lead Acid Battery Charge Controller 5A
  • Battery BMS Protection Board For 3S 18650 Lithium Battery
  • Battery BMS Protection Board For 3-4S 18650 Lithium Battery
  • Mini DC-DC converter Module
  • RS232 Bluetooth Serial Adapter
  • HC-05 Bluetooth Module
  • MP3 Format U Disk TF Card decoder board module amplifier player
  • Digispark Attiny85 Micro USB Development Board
  • RFID T5577 125KHz EM4100 ID Card Copier Duplicator
  • HC-SR505 Mini Infrared PIR Motion Sensor
  • NCP1203D60 PWM Controller IC
  • Energy Meter Electricity Monitor

You can find links for all of these items in the video description.