I did a preliminary blog about this on May24th and promised more when I got the boards. It's a bit of a mixed story some good news, and some less good. I'm posting the LTSpice model and the schematic again , to avoid endless cross referr...
I first blogged about this project in March. Seems quite while ago now but I have found some time to work on it.The main boards have been made and assembled.Mostly it works OK, (and one has been used to solve an entirely different problem for a custo...
23/03/2020 This project was sparked off by John's blog:One of My Favorite Building Blocksjw0752I've been thinking about power supply designs and read John's blog just after reading the power supply project in "The Art of Electro...
ORIGINAL POST 10/03/202UPDATED 11/03/2020 : Filter response plot added.UPDATED 17/03/2020: Board design notes added. This idea has been at the back of my mind for while, but got pushed to the top of the stack by a post from amiranghi...
We seem to talk a lot about power supplies on E14 - not unreasonable - you can't do much electronics without a decent bench power supply. You can buy a new single channel 30V 5A sort of thing for about £50 - and if cash is tight and your app...
I've just been testing a design that includes 8 hybrid (ie mixed analogue and digital) lock in amplifiers. They aren't, strictly speaking, lock in amps because they are synchronised to an internally generated signal which dives a laser. There...
We see lots of questions on E14 about energy harvesting. This link is to a nice article from Analog Devices, mainly about using once of their chips for very low power solar cell applications, but the article make some interesting background poin...
I've spent most of this weekend (about 14 hours of it) soldering 3 of these. It's an industrial 24V IO board for a client with Ethernet interface. 14 of the pins are programmable input, output, pull up/down, adjustable thresholds etc. I'v...
This is my Ethernet switch board with 3 port Micrel switch, STM32F427 processor, real time clock and LCD display. (Totally open source hardware - copy as much as you like - I will publish Gerbers and other stuff on 26/09/2015) If you want ...
