Search found 5 matches

by chris.james
Wed Mar 23, 2016 11:31 pm
Forum: IR Protocols & Codes
Topic: Infrared Burst Length
Replies: 1
Views: 7836

Infrared Burst Length

Hello, wanted to ask a question that google does not seem to be my friend with, what is an infrared burst length? From what I understand its the minimum length that you need to transmit an infrared burst for it to be picked up by the sensor. I am looking particularly at the TSOP4856 I have been in c...
by chris.james
Sat Jan 02, 2016 6:52 pm
Forum: Community
Topic: 555 in astable mode (carrier frequency)
Replies: 7
Views: 24512

Re: 555 in astable mode (carrier frequency)

no i haven't my application is for a laser tag setup so im trying to get the frequency to be the best match for the diode and receiver to avoid this being a range limiting factor, ive been looking at code for doing this, im trying to avoid using external library's and making the code as optimised as...
by chris.james
Sat Jan 02, 2016 5:50 pm
Forum: Community
Topic: 555 in astable mode (carrier frequency)
Replies: 7
Views: 24512

Re: 555 in astable mode (carrier frequency)

Hi a lot of people on the forums believe that using another chip would be a better way so now i am trying to use my arduino duemvilanove to generate a 56khz square wave using the method describe here https://www.arduino.cc/en/Tutorial/SecretsOfArduinoPWM however its not making much sense at the mome...
by chris.james
Wed Dec 30, 2015 4:58 pm
Forum: Community
Topic: 555 in astable mode (carrier frequency)
Replies: 7
Views: 24512

Re: 555 in astable mode (carrier frequency)

I have attached a proper picture below that might help, Thank you i am using a breadboard with jumper wires and they are most probably to long. My application for this is a laser tag set-up so it is a long range application, I have used a 555 timer to generate the carrier frequency as I do not want ...
by chris.james
Wed Dec 30, 2015 1:04 pm
Forum: Community
Topic: 555 in astable mode (carrier frequency)
Replies: 7
Views: 24512

555 in astable mode (carrier frequency)

Hi all, I am trying to create a astable circuit to generate a 56khz carrier frequency for infrared but first i want to build the astable circuit using a 555 timer i have used the information online using this website here http://www.ohmslawcalculator.com/555-astable-calculator the values i have used...