Wirelessly Triggering a transistor

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SUMMARY

The discussion focuses on wirelessly triggering a transistor to remotely power on a computer using an IR receiver. The proposed method involves connecting an IR receiver to the base of a transistor, with the collector linked to the power supply and the emitter to the PS_ON line. To avoid interference from other IR devices, the use of an encoder/decoder pair, specifically Holtek models HT12A, HT12D, HT12E, or HT12F, is recommended for generating a unique signal pattern. Participants emphasize the importance of reviewing datasheets to ensure compatibility with the intended application.

PREREQUISITES
  • Understanding of transistor operation (NPN or PNP)
  • Familiarity with IR communication principles
  • Knowledge of encoder/decoder circuitry
  • Ability to read and interpret electronic component datasheets
NEXT STEPS
  • Research Holtek encoder/decoder pairs, specifically HT12A and HT12D
  • Learn about transistor switching circuits and their configurations
  • Study IR receiver modules and their interfacing with microcontrollers
  • Explore practical applications of remote control systems in electronics
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Electronics enthusiasts, hobbyists building remote control systems, and engineers designing wireless power solutions will benefit from this discussion.

sl1solo76
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I use my computer a lot for watching movies and at night i really don't like getting up and having to manually hit the power switch, so i was thinking it could be possible to do it wireless.

Now i have a general concept here, maybe an IR reciever going to the base, a line feeding from the power supply somehow connecting to the collector, and the emitter tied to the PS_ON line. Connecting the +v from the power supply and the PS_on is the same as pushing the power button.

The only thing is I am not sure how to make the receiving LED trigger the transistor... directly hooking it up sounds way to simple...

any ideas? or IS it that simple?
 
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Simplest way is to use an encoder/decoder pair...

You need an encoder to generate a pattern that only the decoder will respond to, rather than all the IR devices in your bedroom (tv, video, dvd player etc etc).

Holtek do some suitable encoder/decoder pairs, HT12A, HT12D, HT12E, HT12F...

Download the datasheets from their site & see if they are suitable.
 

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