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 Robotics / Handy Board / 8023
8022  |  8024
Subject: 
Re: IR output driver
Newsgroups: 
lugnet.robotics.handyboard
Date: 
Sat, 26 Aug 2000 11:29:37 GMT
Viewed: 
1170 times
  
it's rated for 1 amp.  so you'd have no trouble at all with what you
describe below.

fred

In your message you said:
Does any one know how much current the ZTX614 NPN Darlington transistor
(Q1 - IR output driver) can handle. I am wondering whether I can use
this to driver a total of 5 IR leds, either in parallel or series. The
indicator led circuitry that goes in parallel to the ir output uses a
1Kohm resistor with one of the 2mA leds so I am assuming that if I use 5
x 1K resistors (one for each output) to drive the leds at 2mA (approx)
the overall current going through the transistor should be about 12mA.
Could someone clarify this.

Thanks

John Hatton
johnhatton@email.com




Message is in Reply To:
  IR output driver
 
Does any one know how much current the ZTX614 NPN Darlington transistor (Q1 - IR output driver) can handle. I am wondering whether I can use this to driver a total of 5 IR leds, either in parallel or series. The indicator led circuitry that goes in (...) (24 years ago, 24-Aug-00, to lugnet.robotics.handyboard)

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