This is a short weekend video on how I changed the cold white led on my bedside reading lamp to a warm white one which is better for my eyes.
Author: voltlog
Voltlog #43 – LCD Monitor Repair
In this video I am repairing an old 19 inch lcd monitor (Iiyama ProLite E481S) who isn’t powering up anymore. As usual with these lcd monitors, the fault is caused by capacitors on the power supply board.
Voltlog #42 – DIY 4 x 18650 Battery Charger
Today we’re going to be making a DIY lithium battery charger and more specifically aimed at charging 18650 cells. I sometimes take apart some of these laptop batteries to recover 18650 cells and I have a bunch so far that I kept. Every-time I salvage these cells I test them before deciding to keep them or not.
As you can imagine it takes time and I need to charge multiple cells at once. So I will be making a charger that can handle 4 x 18650 cells but the project is scalable and you can increase or decrease the number of cells it can handle according to your needs. As usual, links for all the items will be in the video description.
Voltlog #41 – 60W Dummy Load Mod 20mA to 999mA
This video is about the 60W dummy load discussed in episode number #38 and #39 and if you haven’t watched those two videos I recommend you do, there will be links below. In this video I am doing a mod to change the range of the dummy load from 0.2A-9.99A to a new range of 20mA to 999mA.
Voltlog #40 – InTheMail
Once again too many mail items to fit into a single video, so we have a two parts upload. In the first video I only had time to show two items the SONOFF from ITead and the SP mini from Broadlink but that is including teardowns and discussions on the internals. Surprisingly the SP mini doesn’t use the ESP8266 as expected but instead it uses the MT7681 from MediaTek.
Voltlog #39 – 60W Dummy Load Reverse Engineering
In this video we’re discussing the dummy load again but this time I reverse engineered the dummy load schematic and I discuss it’s basic theory of operation. Check the video description for a link to the pdf schematic.
Voltlog #38 – 60W Dummy Load Review
In this video I am doing a review of the recently purchased 60W Electronic Dummy Load. I go through the different operating modes, a short stress thermal test and in the end I am presenting a conclusion whether or not this is a good buy.
Voltlog #37 – InTheMail
Hi and welcome to a new InTheMail, this time we have allot of items to look at and some of them were ordered 2 or even 3 months ago but due to the postal service madness that happens every year during holidays they arrived a bit late.
The video is split across two parts to avoid making it too long so make sure you watch both parts.
Voltlog #36 – The Dark Load PCB Layout With EagleCAD
This video is mostly a time-lapse of me doing the PCB layout for the Dark Load project that I am working on. However during the first minutes of the video I am commenting and giving some hints on some design decisions that I make during layout.
This entire design is open source and it will be shared once I have it working but for now it’s still quite beta and I don’t want to release something that is potentially not working or might contain errors.
Voltlog #35 – SMD Assembly And Reflow
In this video I am going to show you how I assemble PCBs with surface mount devices. First I apply the solder paste with the help of a stainless steel laser cut stencil, next I manually pick and place all the components and the last step is to run the boards through a reflow profile in my DIY reflow oven.