Here’s one from distant year of 2017. I had picked up an assortment of obsolete 1U and 2U networking and electronic equipment, most of which are currently destined for the scrap pile. One of those items was a Leightronix Pro 16 video Event Controller A/V switcher. It has 16 BNC and stereo RCA inputs and… Read more »
This project spawned from the acquisition of an ICT branded 12V, 10A non-adjustable power supply. It had lived its life powering some device in a supermarket and made its way into my workshop. I had needed an adjustable bench supply, and the schematic was readily available for a similar model which I have attached to… 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 »
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 »