The unknown IC and the Sony SBX8025-F

[Colin McGregor]

This sounds fantastic.

Can I quote you on this? The reason I am interested in
sensors is in part driven by the fact that I am
writing an article and I want to give credit where
credit is due. Related question, Peter what is your
last name (or how would you want me to credit you)?

Colin McGregor

--- Peter <plp-ysDPMY98cNQDDBjDh4tngg at public.gmane.org> wrote:
> How to hack the 3 pin sensor:
> 
> connect a 5V supply through 2 1k resistors and a 5mA
> led like so (use 
> fixed font to view ascii art):
> 
> 
> +5v---*----1K----A LED K---- (1) (Out) To Sensor IC
>        |
>        +----1K--------------- (2) (Vdd)
> 
> GND------------------------- (3) (Gnd)
> 
> 
> Connect the 1,2,3 contacts to the remote receiver in
> all possible 
> combinations and notice which causes the led to
> blink if you fire a tv 
> known good (!!!) remote at it (not from too close
> i.e. cca 1 meter). You 
> may have to shield the IC from desk lamps etc. to
> have it work.
> 
> Additional hint: with most non-power ICs the lowest
> reading reverse 
> diode (found with a dvm on the diode scale by
> randomly measuring between 
> pins) is the Vdd-Vss reverse junction, i.e. you
> found the power pins 
> (plus will be on the black wire of the dvm and minus
> on the red). Of 
> course there is no guarantee.
> 
> You have to use a 5mA, preferrably red led. If not
> (using an ordinary 
> led), the light emitted will be extremely dim.
> 
> You do this at your own risk, you get to keep the
> (unlikely) smoke that 
> you let out etc. The circuit shown should be safe
> for 'hacking' sensors, 
> it passes at most 5mA per pin. I have used it with
> success many times 
> before.
> 
> Peter

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