Voltlog #124 – Getting Started With E-Paper Display Module

In this video I’m gonna show you how to load a custom image on the e-paper display. Let’s see how easy it is to get started working with one of these e-paper display modules and an Arduino board.

Link e-paper display black/white:

More resources below:

Voltlog #123 – Buzzer Comparison

In this video I am measuring the output level of the various buzzer that you can find on ebay, banggood or aliexpress.


Get the UNI-T UT353 Sound Meter from these sources:

Here are all the buzzers shown in this video:

Voltlog #122 – C5W LED vs Incandescent Bulb Temperature

Welcome to a new voltlog, in a previous video I showed these C5W LED bulbs that I got from ebay they were very cheap so I put them to a test and discovered they reached very high temperature in just 15 mins of running in free air which got me concerned, the fixture of this bulb could melt.

C5W LED Bulb on Ebay 

C5W LED Bulb on Aliexpress 

C5W LED Bulb on Banggood 

Thermometer used in this video

Voltlog #121 – InTheMail

This video starts with a rant about how bad the postal system is around here(Romania).

Here is a list with links to all the items shown in this video:

Voltlog #120 – Mini DC Power Supply Review

So I guess a gadget like this is worth 10$ because you could replace that linear breadboard power supply with a more efficient one, which will give you voltage and current display as well as adjustable output.

Here are some images I took during the teardown of the mini power supply:








Checkout this power supply from the links below:

60W Electronic Dummy Load Battery Tester:

Voltlog #119 – NEW 150W Dummy Load Review

Today we are taking a look at yet another electronic load. I found this one on Aliexpress, I think it’s a rather new model so let’s see what it can do.

Here are links to the 150W and the 180W version of this dummy load:

Voltlog #118 – InTheMail

Don’t forget to hit the like button if you enjoyed this video!

Links to all the items shown in this video are below:

Voltlog #117 – Ebay Bussman DMM Fuses Fake or Genuine?

In this video we’re going to do some tests on these ebay fuses to try and determine if they come close to the specified ratings of the original fuse.

Links to products shown in this video:

Voltlog #116 – UNI-T UT211B Clamp Meter Review & Teardown

today we are taking a look at the UNIT UT211B clamp meter it can do both AC and DC measurement and it has 1mA resolution on DC measurements and 0.1mA on AC. We’re also going to take a look at the DANIU P1600D test lead kit which has a bunch of accessories that might be useful.

Links to products reviewed in this video:

Voltlog #115 – Pure Sine Wave Inverter Circuit Waveforms

This is a followup video on the 300W pure sine wave inverter I reviewed a couple of weeks ago.  A couple of people we’re curious how the output mosfets are switched in order to obtain that nice looking sine wave on the output.