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Posts Tagged ‘UPS’

Building a Raspberry Pi UPS and serial login console with tinyK22 (NXP K22FN512)

Friday, May 10th, 2019

Erich Styger has been working on a UPS with the Raspberry Pi to cover a short power out: There are different ways to ruin a Linux system. For the Raspberry Pi which uses a micro SD card as the storage device by default, it comes with two challenges: 1.Excessive writes...

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Posted in R-Pi | No Comments »

UPS transfer time measurement

Thursday, August 29th, 2013

Kerry D. Wong writes: Most offline/line interactive UPS‘ (Uninterrupted Power Supply) have a transfer time between 5 to 15 milliseconds. In this post, I will show you the results of the measured switch-over performance of my APC Back-UPS XS1500 and the technique I used.

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Posted in how-to, measurement | No Comments »

App note: 1000VA Digital pure sine UPS

Sunday, November 13th, 2011

Here's a reference design from Microchip for a 1000VA pure sine uninterpretable uninterruptible power supply. UPS usually use 3 circuits to function. A charger for battery, a inverter to convert DC battery power to mains AC, and a controller that switches from mains to battery when the power is interrupted....

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Posted in app notes | 7 Comments »

Recent Comments

  • gant: They still have a couple of the more expensive (but still considerably cheap) 5S-I-S01 in stock...
  • William: lol I'm happy to waste 3c for each program/debug cycle... but probably not the time spent soldering a new device down to a proto board!...
  • Joe Desbonnet: Ya, I can recommend the low melting point solder. I used brand 'ChipQuik' and it's amazingly easy to use.
  • Jerome: I need a new BusPirate for the Fablab ;) Many thanks!
  • Max: Seems like an unexpectedly violent way to remove the chip indeed. A hot air station should of course do the job just fine, but in...