Today we’re going to be assembling this frequency generator kit based on the ICL8038 which I got in an earlier InTheMail episode. The ICL8038 waveform generator is a monolithic integrated circuit capable of producing high accuracy sine, square, triangular, sawtooth and pulse waveforms with a minimum of external components.
Category: DIY
This category will hold everything DIY related.
Voltlog #45 – Multiple Rail Power Supply Kit Assembly
In this video I am assembling a multiple fixed rail power supply kit. This power supply works with a 5-24V input either through a USB mini socket or a dc barrel jack (2.5mm center positive) and at the output you get +12V, -12V, +5V, -5V and +3.3V. My kit was missing 1 small heatsink and one of the electrolytics was a different value than specified on the PCB.
Voltlog #44 – 1W USB LED Lamp Mod Warm White
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.
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 #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 #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.
Voltlog #34 – Fluke 77 Teardown & Repair, Varistor Replacement
In this video I’m opening the Fluke 77 I scored at a recent auction to show and repair a small issue it has. One of the MOV (metal oxide varistor) in the input protection circuit had suffered damage probably while protecting the rest of the circuit when a HV signal was applied to it’s input, so I decided to replace the MOV.
The original MOV part number is V910LSX1399 specs: 910V 10% 1mA
The replacement MOV part number is Panasonic ERZV10D911 specs 910V 1mA