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’ »
November 13, 2017, 10:29 pm
As mentioned in my previous post, besides the broken LCD there was also an issue with the power supply portion of the unit and the output voltage was clamped at around 10 to 11V. The digital circuitry portion however seemed to be intact. Unfortunately since an identical LCD is virtually unobtanium, I thought I’d reverse engineer the LCD protocol so once the power supply is fixed I can fix the display by hooking up a different LCD. Continue reading ‘Reverse Engineering of BK Precision 1696 Switching Power Supply’s LCD Protocol’ »
Tags:
7 Segment,
BK 1696,
BK Precision,
LCD,
NJU6433F,
Programmable Power Supply,
Protocol,
Reverse Engineering,
SDP,
SPI,
Switching Power Supply Category:
Electronics |
5 Comments
November 4, 2017, 7:45 pm
I recently picked up a BK Precision 1696 programmable switching power supply off eBay. Unlike many of the vintage test equipment I did teardowns with in the past, this model is still in production today. The one I got was sold with a damaged LCD screen and thus I paid very little for it. Of course, a brand new one would cost around $300. Continue reading ‘Teardown of a BK Precision 1696 Programmable Switching Power Supply’ »
Tags:
ADUC831BS,
BK 1696,
BK Precision,
CD4052BC,
LM324,
MAX202CPE,
MAX485,
MC33262,
NJU6433F,
OP27G,
OP491G,
P781,
PFC,
Programmable Power Supply,
RS-232,
RS-485,
Switching Power Supply,
Teardown,
TL494 Category:
Electronics,
Teardowns |
3 Comments
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’ »