December 1, 2019, 4:45 pm
A while back, I did a teardown on a dual-channel Amrel PPS-2322 programmable power supply, and was quite impressed by its solid construction. Recently, I found another Amrel power supply on eBay and this time it is a single channel version (PPS 35-2). Let’s take a look inside this signal channel version and see how much in common it has compared to the dual channel 2322.
Continue reading ‘Teardown of an Amrel PPS 35-2 Programmable Power Supply’ »
January 7, 2018, 12:42 pm
Quite a few people had contacted me on the availability of the firmware for the Amrel PPS-2322 programmable power supply I did a teardown with a few years ago. I finally got a chance to it and backed it up with my TL866A, better late than never. For those who wanted to download a copy of the firmware, you can find the link towards the end of this post. Continue reading ‘Amrel PPS-2322 Programmable Power Supply Firmware Backup’ »
May 17, 2015, 9:30 pm
As I mentioned previously, Amrel PPS-2322 (dual 32V/2A) does not have a fan controller so the fan is on whenever the power supply is on. The fan noise can become quite annoying and distracting. So I built a simple fan controller which would turn the fan on and off automatically depending on the heatsink temperature. Continue reading ‘PPS-2322 Performance Verification and Automatic Fan Controller Design’ »
May 6, 2015, 6:11 pm
I picked up an Amrel PPS-2322 programmable power supply from eBay recently. You probably have not heard of the Amrel brand before as American Reliance (Amrel) no longer makes power supplies nowadays. Its power supply division was acquired by AMETEK Programmable Power, a subdivision of AMETEK back in 2010. While Amrel power supplies had been discontinued, Amrel branded electronic loads are still being actively developed and sold by AMETEK. Continue reading ‘Amrel PPS-2322 Programmable Power Supply Teardown’ »