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Old 29th Mar 2019, 6:11 pm   #1
boombox
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Default Another pulse to tone possibility

Anybody tried one of these little Chinese rascals? Looks like they'd be about 20 with slow postage.
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Old 29th Mar 2019, 7:41 pm   #2
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Default Re: Another pulse to tone possibility

That's a good find for a device similar to the Dialgizmo

There is also another device working on the RotaTone principle

HERE

At that price maybe I'll buy those rather than build any more of my home built ones.
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Old 29th Mar 2019, 8:03 pm   #3
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Default Re: Another pulse to tone possibility

Not met that one before, but the price (at $27 including postage to UK) compares well with that of the dialgizmo, albeit uncased. I see no mention of speed dial facilities such as those of the dialgizmo, so it depends whether these are important to you.

Although it comes without a casing, it looks as though it would be small enough to mount inside the pattress of a flush-mounting telephone socket.

If you fancy giving one a try, I'd be interested to hear how you get on.
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Old 7th Apr 2019, 2:09 pm   #4
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Default Re: Another pulse to tone possibility

Quote:
Originally Posted by rambo1152 View Post
That's a good find for a device similar to the Dialgizmo

There is also another device working on the RotaTone principle

HERE

At that price maybe I'll buy those rather than build any more of my home built ones.
Looks nifty, that, Rambo! Do you sell them, or failing that, the schematic?
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Old 8th Apr 2019, 9:54 am   #5
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Default Re: Another pulse to tone possibility

It does come with a case Dave, I've just ordered one and will let you know how it all goes
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Old 8th Apr 2019, 11:35 am   #6
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Default Re: Another pulse to tone possibility

I see no mention of a case in the (rather quaintly-worded) advertisement referenced at the start of this thread, and the image doesn't show one.

The same applies to the internal module referenced later.
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Old 8th Apr 2019, 1:37 pm   #7
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Default Re: Another pulse to tone possibility

The third picture shows a cream-coloured case: https://ae01.alicdn.com/kf/HTB1HQ_YX...erican-and.jpg.

For a home-made thing see: https://www.vintage-radio.net/forum/...d.php?t=135674
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Old 8th Apr 2019, 10:26 pm   #8
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Default Re: Another pulse to tone possibility

The item pictured at the foot of my post #2 is basically the circuit Joe ThePillenwerfer described. My contribution was to miniturise it using a sandwich of two fragments of perforated project board so it fits into the tiny eBay trinket case shown.
I'll gladly post the layout I used next week and if nothing else, following Joe's instructions will teach you a useful skill; how to programme Atmel microcontrollers
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Old 9th Apr 2019, 12:03 am   #9
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Default Re: Another pulse to tone possibility

At least 3 of the reviews show it in a case.
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Old 9th Apr 2019, 8:09 am   #10
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Default Re: Another pulse to tone possibility

Yes, I missed the third image with the case. So all you need to add is a line cord (and any adaptors for equipment with BT plugs).
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Old 9th Apr 2019, 9:04 am   #11
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Default Re: Another pulse to tone possibility

Quote:
Originally Posted by rambo1152 View Post
I'll gladly post the layout I used next week and if nothing else, following Joe's instructions will teach you a useful skill; how to programme Atmel microcontrollers
Thanks, Rambo, that would be great. I've flashed the Texas Instruments CC Debugger before and am used to uploading my own code to various Arduino/Teensy/Photon boards, so I should be ok learning how to program an Atmel microcontroller. Famous last words.

I'll go see about buying in the parts. Did you consider getting PCBs done? Also, second question, did you replace the zener + resistors with a 78L05, and researching it some more, did you fit a protection diode on the VCC of the microcontroller ?

Thanks - exciting

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Old 10th Apr 2019, 8:48 pm   #12
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Default Re: Another pulse to tone possibility

Have you read this?: https://bre.is/meI9Rerwik
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Old 11th Apr 2019, 7:47 am   #13
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Default Re: Another pulse to tone possibility

I see that the alldav.com converter reviewed therein is now priced at $25. Given that the the review was dated November 2012, I suppose a 25% increase over 6 years isn't excessive - though electronics prices tend to go in the other direction
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Old 15th Apr 2019, 9:35 pm   #14
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Default Re: Another pulse to tone possibility

I ordered one of these and it has just arrived. IT DOESN'T WORK.
Wish I'd read the reviews before ordering as it seems about half of them don't work and the supplier won't refund.

Will get on to PAYPAL if they won't refund me.
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Old 16th Apr 2019, 7:55 am   #15
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Default Re: Another pulse to tone possibility

Any supplier that won't refund a faulty item is to be avoided like the plague, so please accept both my commiserations for your experience and my thanks for the warning.

If the seller were in the UK, they would presumably be in breach of the law and could be prosecuted. At least PayPal should come to your rescue.

By the way, was this the Chinese offering or the one from alldav?
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Old 16th Apr 2019, 11:42 am   #16
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Default Re: Another pulse to tone possibility

Mine has just arrived and doesn't work either! I'm waiting for a response from the seller but I expect it will be the same as winston_1's was.
I've had the alldav one for a few years and that works fine.
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Old 17th Apr 2019, 11:08 am   #17
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Default Re: Another pulse to tone possibility

It's working! Because of the lack of instructions I had assumed that it was wired the same as the alldav and Dialgizmo as they all look the same - not so! The RJ11 socket is the output and the other end is the input.
I wired a female BT to the 2 terminals inside and an RJ11 to BT plug into the socket and it works perfectly. Remember when wiring the lead that the 2 INSIDE contacts on the RJ11 are the line.
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Old 17th Apr 2019, 10:16 pm   #18
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Default Re: Another pulse to tone possibility

I must admit that I too would have assumed the RJ11 to be for the 'phone and the screw terminals for connection to the line. Well done for establishing that it is the other way round. I wonder how many of the reported failures result from the false assumption.

Incidentally, when I bought my Dialgizmo its label had inadvertently been stuck on the wrong way round so that the socket was labelled "line" and the plug "phone". Once I had established the error I peeled off the label and turned it round.
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Old 17th Apr 2019, 10:57 pm   #19
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Default Re: Another pulse to tone possibility

Really! All the pictures imply the line goes to the RJ45 socket. I'm away at the moment till Friday but will certainly try it when I return. Thanks for the info. Why oh why can't they supply instructions?
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Old 18th Apr 2019, 11:32 am   #20
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Default Re: Another pulse to tone possibility

Looking at the PCB more closely it does actually say TELEPHONE between the 2 terminals!
Another thing to mention is that because it's a 2 wire connection, if the phone you want to plug in has been converted, you'll need a ringing capacitor. The BT socket I wired in has one in it but you could cut the plug off an old ADSL filter and wire that to the 2 terminals as they have a capacitor in.
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