Author Topic: TSOP circuit  (Read 6346 times)

0 Members and 1 Guest are viewing this topic.

Offline evilknight007Topic starter

  • Jr. Member
  • **
  • Posts: 42
  • Helpful? 0
TSOP circuit
« on: October 26, 2007, 08:52:31 AM »
Hi Ppl..
Can anyone give me a circuit for TSOP based IR proximity sensor circuit .
I have been trying out some circuits based on TSOP based sensors. But none seems to be working.  :(  ???

i hv given a link of the circuit i hv been trying out . whats wrong in it . .The data sheet of TSOP says tat it is necessary to generate a short bursts of modulated wave . But the circuit seems to give only continuous modulated wave .Is that what is missing out in here .
Thanks .

Offline Ro-Bot-X

  • Contest Winner
  • Supreme Robot
  • ****
  • Posts: 1,431
  • Helpful? 25
  • Store: RoBotXDesigns.ca
Re: TSOP circuit
« Reply #1 on: October 26, 2007, 09:39:22 AM »
TSOP IR receivers will filter out as noise any modulated signal that is continous for more than a few miliseconds. So all you need to do is connect a microcontroller to the R pin on the 555 IC. This pin should be connected to Vcc through a 100k resistor, not directly. Basically you toggle the output pin from the microcontroller from Low to High and back to Low, for a few miliseconds. Instead of the microcontroller you could use a second 555 tuned for a low frequency that will turn on and off the first one.

If you use Panasonic PNA4602 (38kHz) you don't have this problem.
Check out the uBotino robot controller!

Offline hgordon

  • Expert Roboticist
  • Supreme Robot
  • *****
  • Posts: 373
  • Helpful? 7
Re: TSOP circuit
« Reply #2 on: October 26, 2007, 10:25:53 AM »
Here's a schematic that uses the TSOP 1736 receiver and TSAL 6200 emitter -

You'll find firmware source code to modulate the emitter in utils.c
« Last Edit: October 26, 2007, 10:26:56 AM by hgordon »
Surveyor Corporation

Offline evilknight007Topic starter

  • Jr. Member
  • **
  • Posts: 42
  • Helpful? 0
Re: TSOP circuit
« Reply #3 on: November 01, 2007, 12:46:48 PM »
thank u guys .. will let u know if it works .thanks again


Get Your Ad Here