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5 Threads found on edaboard.com: Pwm Decoder
Assuming I am OK with setting up a 555 bases pwm (53kHz) to run a few IR LEDs and that I can get an unmodulated IR LED and phototransistor to drive a red LED as an indicator as you pass your hand over the phototransistor.
What is the best way to go about demodulating a 50kHz IR signal coming from the phototransistor.
I have tried a high pass
Digital Signal Processing :: 12-11-2013 17:49 :: boylesg :: Replies: 1 :: Views: 341
Why don't you refer to known working IR remote control protocols like RC5? Why not generating the 38k in software respectively by a pwm output?
You definitely don't need analog components besides IR-diode, current limiting resistor and IR receiver.
Hobby Circuits and Small Projects Problems :: 07-19-2013 10:44 :: FvM :: Replies: 2 :: Views: 419
A phase detector with a 50% pwm reference signal, low pass filter plus VCO without feedback,
and a VDD/2 comparator for the filter output signal to get the direction signal.
Some positive comparator feedback to achieve a reasonable stop band.
Analog IC Design and Layout :: 02-12-2012 08:47 :: erikl :: Replies: 3 :: Views: 487
Hi! I don't have a background on VHDL/FPGA until last month when i started to self-study because there is a design contest in our school. Part of the contest is designing a pwm Encoder having 8 bits of input from an ADPCM decoder and the pwm Encoder is fed with a PCM. The output of the pwm Encoder is also 8 bit. I (...)
PLD, SPLD, GAL, CPLD, FPGA Design :: 09-23-2005 12:10 :: PWM_encoder :: Replies: 0 :: Views: 1764
Does anybody have any code written in C to decode the pwm output of a RF remote control (from a car alarm) . Doesn't have to be code hopping just read the code so that I can display it .
Thanks in advance
:lol: :lol: :lol:
PC Programming and Interfacing :: 01-21-2003 14:04 :: schmitt :: Replies: 8 :: Views: 5064