Sensor for toy

Hi Geoff,

Just out of curiosity if you hook up the IR filtered PhotoDiode can you get the unit to activate by pointing a TV remote at it and pressing one of the buttons ?

Ian

Edited By SLOTDRILLER on 29/11/2013 03:37:56

Thanks for looking Steve.

Will give that a try Ian.

Geoff - Hopefully workshop time today

Ian,

Your suggestion works.

Does that mean it needs a far more sensitive IR diode? If so, how do you specify it?

My qualifications are all with HV, with bits and bytes just making an appearance when I left the profession.

Other half said the ladies where waving their hands in front of the inbuilt sensor to activate it.

Progress is being made, with thanks to all the help received.

Geoff - Washing down and hung

Hi Geoff,

Isit possible that there could be an IR LED in parallel to the photo diode ?

I was thinking that it could just be a simple comparator circuit that senses the voltage of the negative side wire and that negative side wire could have a small resistor in series that along with the current limiting resistor for theIR LED would create a voltage divider and you also get a voltage drop across the LED.

So by placing the Photo diode in parallel with the IR LED and it's current limiting resistor you have a light activated bypass switch as it creates a short across the led / resistor and this would create a very short voltage spike that a comparator could sense .

the other resistor would be internal to the sensor circuit in the doll , maybe if you can measure the voltage on the leads and then measure the resistance of the low side ( negative ) lead to the battery negative ?

I was playing around with a laser training tool that I made a couple of years ago for pistol shooting , it uses a sound activated laser mounted to the gun that activates a Photo transistor in a receiver on the other side of the room .

I dug the receiver out and set it up and sat my tv remote on top , then pressed a button and if I waved my hand past at about 2 ft away there reflected IR beam off my hand activated the receiver .

Just a thought.

Ian

It's working at last, so thought I would conclude this thread just in case someone has it in their Bookmarks.

**LINK**

Geoff - iOS doesn't make doing links easy

Edited By OuBallie on 13/04/2015 11:52:52

.

No problem on iOS 5.1.1 ... Look

... I suppose that's progress for you.

MichaelG.

MichaelG,

How the blue blazes did you do the "Look" ?

I'm using 8.1.3 with 8.3 waiting to be installed.

What I hate is progress just for the sake of it or something or someone justifying their position.

Geoff - About 1/2 way through domestic duties %#^}*

.

Geoff,

Nothing clever: Simply copied the URL from your post, then wrote my text, selected the word, clicked the hyperlink icon and pasted the URL.

I fear that your problems may be down to the 'improved' iOS

MichaelG.

.

P.S. ... in case it's not obvious; the easiest way to pick up a YouTube link seems to be to use the 'mail-to' feature [under 'Share'] and copy the link from the draft eMail message.

http://www.youtube.com/watch?v=XJf9EsRtVec&feature=youtube_gdata_player

Edited By Michael Gilligan on 13/04/2015 14:58:14