Maker Pro
Maker Pro

Curious track in a remote control

N

N_Cook

Jan 1, 1970
0
I'm in the process of slightly adapting an IR remote control for another
purpose. The pcb is about 6 x 1.5 inches, LED at one end and main
electronics at the other end.
So ouput line goes from the electronics end, along the outer long edge to
the LED end , back down the other long edge to the driver transistor and
then another long trace back to the LED. The superfluous? loop is not tapped
along its path , so why the circuitous route? and not a simple inch long
track at the main electronics end and one long trace to the LED
 
N

N_Cook

Jan 1, 1970
0
Jan Panteltje said:
Transmission line? RFI filter? Inductor? secret alian trnasmitter at GHz so NSA
knows what program you view on TV? Bad routing program?
Bored designer? Saves etching?


He was not averse to using , elsewhere, 000 ohm "resistors" to
de-spaghettify
 
N

N_Cook

Jan 1, 1970
0
N_Cook said:
He was not averse to using , elsewhere, 000 ohm "resistors" to
de-spaghettify

My mod works fine, so reason for loopiness stands unknown.
Added in a dual, large timing spreads, monostable to go between the r/c
pulse source and the LED driver. To gate the output, by a moveable window.
To narrow down the active part of a pulse stream, in some serendipitous
setting of this URC , that gives some function on an otherwise piece of dead
kit, itself with unobtanium remote control. Then via emulation , expand that
up to full range of IR codes for full operation
 
N

N_Cook

Jan 1, 1970
0
Jan Panteltje said:
I once wrote a piece of C code that sampled the output from a photo diode every x microseconds.
I used it to record the IR remote commands for the VHS recorder.
Then I wrote a small program to start and stop and recored the VHS from the PC,
controlling an IR LED via a par port pin.

That way the codes are safe for the future (just a small binary file for each command).
Sampling at a some kHz via the par port with 0/1 is fast enough for IR remote signals.
http://panteltje.com/panteltje/newsflex/download.html#lremote

Maybe you can even do it with the soundcard.


I'd previously tried going down the LIRC route,
www.lirc.org/
similar to your interface, but my "LIRC" hardware did not work with my pc .
The LIRC library seems to have no recent updates, and LIRC would still be no
good for trying to "exercise" an otherwise dead and unsupported piece of kit
with no OEM or replacement or suitable URC-setting R/C

An alternative approach for your VCR situation would be a cheap LCD-less
learner remote with Eeprom strorage, learn the VCR codes and remove the
batteries and store away
 
Top