Transmitter and Receiver circuit

[mohd ezwan]

i have problem with my transmitter and receiver circuit. This is my transmitter and receiver circuit diagram. Can someone give another or similar circuit diagram that can work and run correctly. Please.

 

[davenn]

what's wrong with it ? what isnt it doing? be specific
what tests have you done so far ?

Dave

 

[mohd ezwan]

This is the problem that mr.audioguru told me.
--The circuits that you found on Aaron Cake's site or on a copy-cat site do not work. I fixed the receiver many years ago but I can't remember fixing the transmitter. Nothing limits the current in its IR LED which will probably blow up.

Look at the 100k to 1M missing resistor to ground at pin 3 of the opamp that is supposed to bias its input at the reference voltage of 0V.
The opamp is 50 years old and is not available anymore. Newer opamps will work better.--

 

[geobabu]

i think applying resistor between the IR LED's cathode & NPN's collector wont blow up the LED . if you are using a 12V battery try a 680R

 

[mohd ezwan]

Owh,oke. I will try your suggestion geobabu. When i've done it, I'll come back to you for the feedback. Thanks for your opinion.

 

[Vizier87]

failing to do so which results in... use PT2262 paired with PT2272, much simple. They're RM3 each, with any transmitter/receiver module.

 

[mohd ezwan]

vizier,can u make a new circuit for it.

 

[Vizier87]

just download the datasheet of the ICs and you'll get all under the sun i.e figure, circuits, theory of operation, ratings, etc.

 

[mohd ezwan]

oke vizier. Thanks for the information. I really appreciate it.

 

[mohd ezwan]

i want to make a transmitter and receiver that can connect with my Dual Alarm circuit. so which transmitter and receiver that i should use.

For pt2272:
1) pt2272 (no data) RF application circuit
2) pt2271 (4 data) RF application circuit
3) pt2272 (4 data) IR application circuit

For pt2262:
1) UHV band 4 data transmitter circuit
2) UHV band address-only (zero data) transmitter circuit
3) UHV band address-only (zero data) zero-stand-by transmitter circuit
4) infrared ray 6-data circuit

on the attachments is my dual alarm circuit.

 

[Vizier87]

mr ezwan, the pt2272/2262 are only ICs to help applications which are ON/OFF. I suppose if you're looking for data transfer, then you'll need better ICs.

The operation is very simple, for the pt2262, there are 4 inputs, any inputs which holds HIGH/ON, the output will also be HIGH/ON at the pt2272's end. If there are 4 switches, ABCD as input let's say, and 4 LEDs at the output of the pt2272, abcd as output for instance, then if you press B, b turns on. Press AC, LEDs ac turns on.

As for your application, you need to describe more on what are your plans, then I can give more input since I'm not sure what you really want.