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Posts Tagged ‘reviews’

Glowing mercury thyratrons: Inside a 1940s Teletype switching power supply

Monday, September 24th, 2018

Ken Shirriff take a look inside a bulky DC power supply REC-30 rectifier, how it works and contrast it with a MacBook power supply: We recently started restoring a Teletype Model 19, a Navy communication system introduced in the 1940s.14 This Teletype was powered by a bulky DC power supply...

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Posted in power supply, Teardowns | No Comments »

Teardown of an Extech 380460 milliohm meter

Wednesday, December 13th, 2017

Kerry Wong did a teardown of an Extech 380460  miliohm meter: This is a highly specialized instrument, all it does is measuring low ohm range resistance (from 200mΩ to 2000Ω in five ranges) and nothing else. The meter came with a rugged case which is handy for field use, although...

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Posted in Teardowns | 1 Comment »

Dangerous Prototypes has never and will never show ads, period

Thursday, July 7th, 2011

My name is Heather and I am a Marketing Administrator for (removed). We have a client that may be interested in advertising on your site dangerousprototypes.com. Is there a good person to contact about options and rates? There's ads on the web? Dangerous Prototypes has never displayed ads or participated in...

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Posted in site | 21 Comments »

Recent Comments

  • Edward Mallon: I've been oversampling those thermistors with the ADC and some pin-toggle noise for a while now, and that method is good. But lately I've been...
  • Marko: armature -> amateur
  • Crawford: Dibs,
  • bill: a sunny Sunday here
  • Iain NoSpam: A very random comment from a very random commenter