Simple circuit parts

I have no idea - your tinyurls want me to register. Why not download the pages and slap them up on your website?

Good Luck, Rich

Rich Grise wrote in news: snipped-for-privacy@example.net:

Better, post the RS order numbers. Anyone can then go to

and enter the part code in the search box. That's the easiest way to point others to RS parts from anywhere, at any time, and still guarantee they get up to date info.

Sorry, your links don't seem to work now.

That is a PIC, you can get them many places. The issue will be getting it programmed. I can probably help you out since the HEX file is available. I don't see any source code though. :-(

These are pretty generic, so any will do fine. It just has to be made for the right frequency (56kHz aparently).

Any 1/4W or 1/8W carbon-comp should do.

You want a ceramice disc for C1 and an electrolytic for C2. Since the voltage in the circuit is so low, almost any will do.

I looked at the schematic, and there are some things I wonder about. Most IR receivers have an open-collector output (meaning they can't supply a positive drive voltage on their own). I would expect to see an external pull-up resistor, I assume the creator is using the "weak" pull-ups built into the PIC. This may work ok, but may also be prone to noise pickup especially if the wires are longish.

Too bad he didn't seem to provide the source, or I could have easily converted it to run on a smaller, cheaper PIC that I happen to have on hand.

Thanks for trying guys, obviously I've still got a bit to learn ! Got npo idea how to upload pages to a web site but the RS codes are

PIC - 379-2869 IR Receiver - 267-8289

The rest are Maplins so should work

Diode -

R1 & R2 - (codes D10K & D47K) C1 - (code BX03D) C2 - got no idea anyone help please

And the circuit is found here

Cheers

Jim

Hi Jim,

The Tiny URL's that you have posted, take us to the RS website, but it tells me that the session has timed out! You would be much better off posting the RS order codes for us to look at.

Cheers,

Tim

If your goal is the learning experience, go for it. If you only care about remoting the thing, you could easily hack an old R/C toy car. You can still experiment and learn with the project as you outlined it, and you'll already be able to use xbox remotely while you play with the project. You'll have the hacked remote done in an afternoon with two relays, 4 diodes and a power supply. Conceptually:

+V -------------+-----+ | | ---o--> To xbox [RLY1] [D2] ^--o-->

| |a A >-----|----->|----+-----+ o--- D3 | | ^ RLY2 n/c contact [RLY2] [D4] o--' | |a | Gnd ------------+-----+---+

Points A and B are the wires in the R/C car that normally connect to the motor. Run the car forward & RLY1 energizes and stays energyzed through its own open point and the closed point on RLY2. Run the car backwards, and RLY2 energizes, dropping out RLY1. The RLY1-2 contact set goes to the xbox.

Ed

You'll need a suitable PIC programmer and what do you use for transmitting the on /off command?

I'm assuming the PIC decodes some sequence of Ir pulses...perhaps it's trainable.

On Thu, 22 Feb 2007 22:12:51 GMT, "Jim" put finger to keyboard and composed:

It's a 47uF 6.3V electrolytic capacitor, or 47uF 10V, or 47uF 16V. Connect its + terminal to the +3.3V supply, and - terminal to ground.

- Franc Zabkar

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Please remove one \'i\' from my address when replying by email.

Hi, thanks to all that replied

Think I'm getting there.

I do have an 'Elvis' programmer which does PIC chips left over from when I used to play about with satllite TV, just need to dig it out and refresh myself how to use it !

My understanding is that the hex code will program the PIC to react to a given IR code (the 0 button and diplay buttons on the Xbox remote if I've read the xirremote site correctly) My plan is to download these codes into my learning remote so that I only need the one remote to control all my kit

Any other input still welcome

Thanks

Jim

On Sat, 24 Feb 2007 11:13:58 GMT, "Jim" put finger to keyboard and composed:

Just a question to those who are watching this thread.

Are learning remotes fixed frequency devices (eg 38kHz) or are they able to learn the modulation frequency in addition to the various codes?

I can envisage sensitivity problems if the remote's frequency is fixed at 38kHz when the Xbox expects 56kHz.

- Franc Zabkar

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Please remove one \'i\' from my address when replying by email.

Updated op via email. Circuit correction (use A or B, not A and B) below:

+V -------------+-----+ | | ---o--> To xbox [RLY1] [D2] ^--o-->

| |a A >--+--| | D1 o--^ RLY1 -1 n/o contact | | +-->|----+-----+ o--- D3 | | ^ RLY2 n/c contact [RLY2] [D4] o--' | |a | Gnd ------------+-----+---+