Olympus RM-1 IR Shutter Release

[Harry Tuttle]

Olympus RM-1 IR Shutter Release

OlympusRemoteV4.fcf

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Simple programme that replicates the shutter release from the RM-1infra red remote control.

P4027024.jpg

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I have used a 16F877A as this is part of a larger project, it should work on any chip with PWM output.

The PWM output is used to produce the 38kHz Carrier frequency. Pin 16 is connected to an IR LED via a 220ohm resistor.

P4027016 copy.jpg

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I have tested this on a Olympus E-3, although I believe this remote control works on other models.

[Harry Tuttle]

P4027022 copy.jpg

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[Harry Tuttle]

The transmitted signal comprises of :
9mSec burst
4.5mSec space
Address first byte
Address second byte
Command
NOTcommand

The logic bits are:
Logic 0 1.12mSec long

logic0.jpg

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Logic 1 2.25mSec long

logic1.jpg

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For more on Extended NEC protocol see:
http://www.sbprojects.com/knowledge/ir/nec.htm

output.jpg

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[medelec35]

I know someone who wanted one of these.
Thanks.
Great article.