Subject:
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Re: jbmiller and Hammatzu IR
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 6 Aug 1996 01:40:58 GMT
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Original-From:
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Prabal Dutta <DUTTA@CIS.spamcakeOHIO-STATE.EDU>
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Viewed:
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1597 times
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Hi Patrick,
I assume that you're using the stock S4282/LED setup? It is
possible to get better range using a slightly different configuration.
The range is largely a function of the the LEDs intensity. Since the
S4282 modulates the LED at 1/16th duty cycle (this is from memory so I
may be wrong), you can significantly increase the current through the LED
without damaging it (i.e. up to an amp or so). You can take the output,
for example, and run it through a transistor which is biased to force
500 mA or and amp through the LED. Of course this would blow the LED
under normal circumstances but because the duty cycle is so small, the
LED does not burn out and result is better range. If you need a biasing
circuit, let me know and I can post one. Good Luck!
- Prabal
>
> jbmiller wrote:
> I was also wondering if anyone has played with the Hammatsu IR modulator IC,
> which was recommended to me by Digital Micro Systems (great tech support!!).
> It's an IC that has all the de/modulation hardware, collector (less emitter)
> onboard. about 8 buck apiece(minimum order of 50 bucks). has anyone played
> with these?
>
> pdeegan adds:
> I have just started using the modulator IC with marginal success and would
> also like to know if anyone can recommend a good IR LED and resistor
> combination for the detector.
>
> thanks
> patrick deegan
>
>
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Message is in Reply To:
 | | Re: jbmiller and Hammatzu IR
|
| jbmiller wrote: I was also wondering if anyone has played with the Hammatsu IR modulator IC, which was recommended to me by Digital Micro Systems (great tech support!!). It's an IC that has all the de/modulation hardware, collector (less emitter) (...) (28 years ago, 5-Aug-96, to lugnet.robotics.handyboard)
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