Like the ASUS M2N32 motherboard, this was not a successful repair, but it may provide some useful info for someone desperately Googling why their particular motherboard is kaput. This board came from the same person who had given me the M2N32 to see if anything could be done with it. The circumstances surrounding its death… Read more »
Generally speaking, when motherboards die they die for a good reason. Once you get to the point where you’ve checked every RAM slot, reset the BIOS, removed all peripherals fans and accessories, swapped CPUs and it STILL doesn’t come to life then chances are you’re in trouble. I took this on as an exercise as… Read more »
I picked up this barebones 5″ portable black and white CRT for $10 from FB marketplace some time ago. I’ve been looking for a miniature color CRT to add to my humble collection of cathode ray tube devices, but this is the next best thing for now. The brand MTC, or MTC Electronics Corporation Limited,… Read more »
Several years ago I purchased the Uni-T UT 181A multimeter to replace the crusty off-brand multimeter which was beginning to fail and give erroneous readings. The main factor driving my decision was the extensive multimeter spreadsheet featured on the EEVBlog Forums. As the data shows it seems to be better spec’d than most the meters… Read more »
Another simple tool I went far too long without. Like many things I do myself, I do it to save money and put this together with things I had readily available. The fan is from an old unused server, the rubber feet are normally used for vibration dampening hard drives in PC cases, the input… Read more »
An older wireless remote for a large overhead crane came across my bench in need of repair. The issue being that the receiver no longer responded to commands issued by the remote. One clear issue was the rechargeable battery pack had been replaced with non-rechargeable alkaline AA’s and there was seriously bad corrosion on the… Read more »
For the longest time I never had a proper variable bench power supply. One reason being they seemed very expensive for what they do, or at least for what I needed. There are the questionable Chinese ones in the $100 range which have adequate specs if you’re willing to take the risk, or you can… Read more »
A customer came to me wanting a custom sub box to fit into the back of his old Chevy Blazer. He had three Alpine SWR-10D2 subwoofers and and an Alpine MRX-M240 mono amp which is spec’d to output 2400W into 2 ohms. Finding Maximum Power Per Driver One of the first steps is calculating the… Read more »
When it comes to speaker design, the lowest frequency driver determines the volume and therefore overall size of the enclosure. The required volume is determined by the mechanical and electrical characteristics of the driver and whether or not the enclosure is ported or sealed. A tool I like to assist me for designing enclosures is… Read more »
It is often useful to be able to test amplifiers or power supplies to see how they perform under their rated specs. This is often a challenge due to the excess amount of heat generated during these tests. One of the simplest and cheapest ways to create a dummy load would be to buy an… Read more »