RadioLink Dual-Receiver Adapter (DIY)

[Phil_G]

I still have three MC14551 multiplexer chips left if anyone still fancies a go. Cant remember, I think I said £4 for the programmed PIC and the mux together.
PM me if you're interested in making one.

Cheers
Phil

[Phil_G]

For Dodgy Geezer:
Chris your adapter arrived this morning, I've just done the pics & its all re-packed ready to post tomorrow morning.
Both pics were in the same state - programmed full of zeros. I've recreated the OSCCAL values.
Your board looks ok, I dont see any mistooks, and it works as expected now.
Cheers
Phil

[Dodgy Geezer]

For Dodgy Geezer:
Chris your adapter arrived this morning, I've just done the pics & its all re-packed ready to post tomorrow morning.
Both pics were in the same state - programmed full of zeros. I've recreated the OSCCAL values.
Your board looks ok, I dont see any mistooks, and it works as expected now.
Cheers
Phil

? also ??. And ???

Not to mention thank you ever so much!!!

I spent some time checking that code was going into them. I was able to take one of those chips, start a machine from scratch, and read the code from it. Or at least I thought I was able so to do.

I shall buy another set of pics to experiment with and investigate further. Perhaps I am hallucinating? But now I am looking forward to putting your design through its paces...

Thanks again...incidentally, had you thought any more about the possible two extra channels in the T4U?


DG

[Phil_G]

I spent some time checking that code was going into them. I was able to take one of those chips, start a machine from scratch, and read the code from it. Or at least I thought I was able so to do.

Well, the first thing I did with them was to read the contents - all zeros. This is not the same as erased - erased is all 1's (3FFF hex for 14 bit core)
They work ok now, no worries.
Phil

[Dodgy Geezer]

Well, the first thing I did with them was to read the contents - all zeros. This is not the same as erased - erased is all 1's (3FFF hex for 14 bit core)
They work ok now, no worries.
Phil

Thanks again for that - I should also apologise for wasting your time. Your comment about the erased chip is useful - I erased them at several points, and can remember seeing 3FFF all over the place. So I need to concentrate on confirming that things are going in and out of the chip. I wonder if this explains the problems I am having with another project, where I don't seem to able to control a stepper motor swinging a telescope......

DG

[Andy2No]

I finally finished making one of these. Thanks, Phil!

It's for one of my friends. My eye sight, hand steadiness and general soldering ability are not what they once were but I managed it somehow. I'm now wondering what to do about insulation, strain relief, mounting and so on. My first inclination was to just hot glue it but maybe the heat would be bad for the chips?

I made it on a small bit of veroboard with a connector block at one end, like a receiver. I cut all the negative and positive pads with a spot cutter, then wired them together underneath. The terminal block and the test button need to be exposed (and the LEDs need to be visible). I'm sure he'll be impatient to have it now it's working so I need to find a way to package it asap so that he's not too likely to damage it - e.g. by snagging wires or shorting something out on something conductive.

How have other people packaged theirs?

[Andy2No]

Okay. Never mind. I've bodged it together with clear heat shrink, a couple of blobs of hot glue at the cable end and some alligator tape. I'll try and take a photo.

I'm still interested to hear how other people have done it though.

[Andy2No]

Slightly off topic;

While I was tidying up the various bits of RadioLink equipment I've been lent to do the job with, I found a broken off receiver antenna - just the silvery bit. The grey insulated bit is still on the receiver. Is there any known way to reattach one?

[Dodgy Geezer]

1 - I use hot-melt extensively - I completely encapsulated the servo exerciser in it, and it didn't seem to hurt it at all...

2 - I am interested and concerned to hear that the tip of the Radiolink reciever aerial may be prone to falling off - we should all note this and take care....

[Phil_G]

If there's enough length you can simply strip 30mm of the outer braid from the end very carefully, so as not to nick the inner.
It doesnt matter that the overall length is reduced. The point where the braid ends is a weak spot on all 2.4 rxs not just RL, especially if the inner was nicked when stripping.
Cheers
Phil