Subject:
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RE: IR output driver
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 24 Aug 2000 21:28:20 GMT
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Original-From:
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Kent Meister <KBMARSHA@EOS.NCSU.stopspammersEDU>
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Viewed:
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1042 times
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Hi!
Zetex has a great tech page where all of the specs are listed:
www.zetex.com
It will have the beta values...
Kent
| -----Original Message-----
| From: jhatton@media.mit.edu [mailto:jhatton@media.mit.edu]On Behalf Of
| John Hatton
| Sent: Thursday, August 24, 2000 6:15 AM
| To: HB Mailing list
| Subject: 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 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
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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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