Posts Tagged ‘transformer’

App note: Transformers

Sunday, August 20th, 2017

App note from Mini-Circuits on transformer types and some basics of them. Link here (PDF) The purpose of this application note is to describe the fundamentals of RF and microwave transformers and to provide guidelines to users in selecting proper transformer to suit their applications. It is limited to core-and-wire...

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Mullard 3-3 Amplifier project (part 2)

Tuesday, February 23rd, 2016

Dilshan Jayakody writes: This is a second article related to Mullard 3-3 Amplifier Project and in this article we introduce HT transformer and HT power supply related to this amplifier. As mentioned in previous post, power supply unit of this tube amplifier is constructed using 400V 5A bridge rectifier, 220µF...

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Calculator for audio output transformers

Wednesday, August 26th, 2015

Dilshan Jayakody  writes:     Audio output transformers are heavily used in vacuum tube and some (older) transistor base audio power amplifiers, but these days output transformer are quiet hard to find and expensive item. For homebrew projects the best option is to construct those transformers by ourselves and this script...

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Home produced 700VA isolation transformer

Wednesday, March 26th, 2014

Dilshan Jayakody writes: This a quick post regarding homemade 300V - 2.3A isolation transformer. This transformer is a part of my ongoing 300V AC/DC variable power supply project and it’s boxed as a separate unit because of its heavy weight and size. All the parameters of this transformer are calculated...

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App note: Choosing the right transformer with the MAX13256

Saturday, February 15th, 2014

Here’s an application note from Maxim describing how to specify a transformer that meets your application needs: The MAX13256, a 10 Watt transformer driver, is an improved way to convey power across isolation boundaries. As with all transformer drivers, good system performance requires good transformer specification. Though many transformers can potentially work...

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Bus Pirate in a transformer case

Wednesday, June 20th, 2012

BADnetwork made a Bus Pirate case out of an unrepairable transformer. We really like how he soldered a button to the PGC and PGD ICSP pins to enter the bootloader for updates. I bought one of these on eBay, It turned out faulty, so stripped it down, turned out it...

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Let the sparks fly with flyback transformers

Saturday, September 24th, 2011

Flyback transformers are used to drive the large odd shaped coils surround the neck of CRTs in TVs and computer monitors. They operate in the 15 to 150 kHz range, and can be used to generate high voltages! Uzzors2k decided to experiment with generating voltages high enough to produce arcs,...

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Recent Comments

  • 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...
  • jose: Part removal described here is pure butchery, the cheapest hot air station will do a fast and clean job removing the QFP, heat air to...
  • Cody: Yes please