0
\$\begingroup\$

I want to capture and replicate IR signals of various electronics. There are various guides out there. However, I realize that there are various carrier frequencies, which I dont see discussed. How do I know what frequency of my target electronics in order to buy the right IR receiver and transmitter? Thanks.

\$\endgroup\$
1
\$\begingroup\$

You buy a common phototransistor that does not depend on a particular modulation scheme, add a biasing resistor, and observe the signal on an oscilloscope.

\$\endgroup\$
  • \$\begingroup\$ Is there any guide or tutorial with circuitry that you can point me to? \$\endgroup\$ – J. Doe Sep 16 '18 at 16:38
  • \$\begingroup\$ Your favorite internet search engine is your friend now, try using keywords like "phototransistor" "circuit" "biasing". \$\endgroup\$ – Elliot Alderson Sep 16 '18 at 16:42
0
\$\begingroup\$

If you want to produce a universal remote control, you can't really make any assumptions about the frequency required.

A simple infrared photodiode will accept any frequency. It's then up to you to amplify the tiny signal they produce, digitise it and store it in memory.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.