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Month: February 2021

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The DM134B 16 bit shift register with constant current LED drivers

  • admin
  • 06/02/2021
I have quite a few DM134B IC’s which are 16 bit shift registers complete with constant current LED drivers built in so I decided to make something useful from them. The chips require minimal components; LED current is simply set via an external resistor which is far better than having to use 16 individual resistors. […]
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2 min 3
  • Avionics
  • General

Racal Avionics data entry device / CDU teardown and test

  • admin
  • 06/02/2021
This will be the last teardown video for a while and this time I have a Racal Avionics CDU allegedly from an RAF Nimrod which I obtained some time ago and discovered that it communicates with a host system over standard RS422. Now, thinking I might be able to connect it to my PC or […]
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