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51
Building your own stompbox / Re: Old telephone ringer stompbox
« Last post by SeneX225 on Yesterday at 09:05:24 AM »
Quote from: GibsonGM on Yesterday at 08:42:47 AM
Try it with the 555 first :)   There are MANY web pages devoted to this little gem, it is in 1,000s of products and has been around forever. 

But first, experiment:  If you 'pulse' the coil wires by touching one of the leads to it repeatedly (with the other attached), does it 'ring' over and over?  If so, then that tells you it works - as long as it's loud enough for what you want to do and all that.  Observe if it hits just one bell over and over (which would tell us it needs AC)

While testing this an interesting development occurred: I've plugged in an AC 9V 1A power supply mentioned earlier and accidentally touched the plate connected to the hammer, and it rang... and did not stop! Not until I touched another side of said plate, which stopped the hammer.



I am both relieved and confused.

52
Building your own stompbox / Re: Prescription Electronics COB Question
« Last post by Mark Hammer on Yesterday at 09:03:25 AM »
Such caps tend to be larger for any given capacitance value, relative to caps of other materials or construction.  That's why I figured it was the lowest/smallest cap value in the circuit - 1nf.

The COB is a decent circuit.  I've built a couple and been pleased with the result.  The name of the pedal tends to mislead, however.  It is not the octave that is clean.  Rather, the circuit allows one to blend in a boosted-but-unmodified signal, WITH the octave (which will be fuzzy).
53
Building your own stompbox / Re: i'm new to pedals, any advice for me?
« Last post by GibsonGM on Yesterday at 08:43:36 AM »
Don't listen to him.   (@bluelagoon :)  )    It's all lies.  C'mon, man...there's NOTHING addictive about this...you KNOW you want that Bazz Fuss...
54
Building your own stompbox / Re: Old telephone ringer stompbox
« Last post by GibsonGM on Yesterday at 08:42:47 AM »
Try it with the 555 first :)   There are MANY web pages devoted to this little gem, it is in 1,000s of products and has been around forever. 

But first, experiment:  If you 'pulse' the coil wires by touching one of the leads to it repeatedly (with the other attached), does it 'ring' over and over?  If so, then that tells you it works - as long as it's loud enough for what you want to do and all that.  Observe if it hits just one bell over and over (which would tell us it needs AC)
55
Building your own stompbox / Re: Biasing RDV Tonebender.
« Last post by sopapo on Yesterday at 08:42:44 AM »
Thanks one more time, Antonis,  :icon_wink:Im not sure if I am capanble to do this kind of calculations, is beyond my head, Its something relatee to change the feedback resistor? Or add an emitter resistor??
56
Building your own stompbox / Re: Old telephone ringer stompbox
« Last post by SeneX225 on Yesterday at 08:06:16 AM »
Quote from: GibsonGM on Yesterday at 07:53:45 AM

I still would get some 555s and build an oscillator (Billions of articles on internet) and try it out, however, since it's a great hobby IC with SO many uses - you will see it over and over....  :)


I sure will!

Quote from: GibsonGM on Yesterday at 07:53:45 AM

If you read this article https://www.epanorama.net/circuits/telephone_ringer.html   The section "50/60Hz ring voltage generated from mains voltage"   seems sensible.  You'd have to pick up the required parts, but if you really like the idea of the loud, ringing 'phone', this is probably the best way....USING PROPER SAFETY of course, KNOWING safety before you mess around :)


The article suggests, as far as I can grasp, building a 12V-120V (Or a 12V-220V in my case since I'm in Europe) transformer. However, as I meantioned earlier I've tried plugging in a 9V AC 1A power supply (also a 12V AC 3.3A I found laying around) and nothing happened.

Quote from: SeneX225 on Yesterday at 03:40:40 AM

Okay, thought I, maybe it needs AC after all, so I plugged in a 9V 1A AC. The result was nothing.


Am I getting something wrong?

Quote from: GibsonGM on Yesterday at 07:53:45 AM
EDIT:  YOU HAVE A RADIO SHACK STILL??  LOL, am I communicating back in time???  :icon_lol:   They may well have a transformer you can use as in the article (they should, 120:12V)

They're not the Radioshacks, but I call them that because people instantly understand what I mean.
57
Building your own stompbox / Re: Old telephone ringer stompbox
« Last post by GibsonGM on Yesterday at 07:53:45 AM »
You could step up the voltage with a 555 flyback circuit, but that may be a bit above your pay grade.   

If you read this article https://www.epanorama.net/circuits/telephone_ringer.html   The section "50/60Hz ring voltage generated from mains voltage"   seems sensible.  You'd have to pick up the required parts, but if you really like the idea of the loud, ringing 'phone', this is probably the best way....USING PROPER SAFETY of course, KNOWING safety before you mess around :)

I still would get some 555s and build an oscillator (Billions of articles on internet) and try it out, however, since it's a great hobby IC with SO many uses - you will see it over and over....  :)

HTH!

EDIT:  YOU HAVE A RADIO SHACK STILL??  LOL, am I communicating back in time???  :icon_lol:   They may well have a transformer you can use as in the article (they should, 120:12V)
58
Building your own stompbox / Re: Old telephone ringer stompbox
« Last post by SeneX225 on Yesterday at 07:51:42 AM »
Quote from: GibsonGM on Yesterday at 07:43:41 AM
Ok, the internet will be your friend! 
Is it easy for you to get 'parts' where you are?  (ie, are you in US/Europe and know where/how to buy chips, transistors etc?)

Yes, I have a couple of local radioshacks where I get all the parts. I just checked and at least one of them has the chip in question (NE555P variant).
59
Building your own stompbox / Re: Old telephone ringer stompbox
« Last post by GibsonGM on Yesterday at 07:43:41 AM »
Ok, the internet will be your friend! 
Is it easy for you to get 'parts' where you are?  (ie, are you in US/Europe and know where/how to buy chips, transistors etc?)



60
Building your own stompbox / Re: Old telephone ringer stompbox
« Last post by SeneX225 on Yesterday at 07:38:52 AM »
Quote from: GibsonGM on Yesterday at 07:31:40 AM
OK...well, if it 'rang and stuck' on 9V, I see no harm whatsoever in hitting it with an intermittent signal (ie, a pulse). You can try a 555 at low frequency and see if its output is enough to trip it, tho the 555 puts out around 2/3 VCC, IIRC, which may not be enough.   So you may need to amplify that output to get a higher voltage - or run the 555 on something higher than 9V tho <15V (max rating of 555, with 18V MAX rating (death)).
Play around!  :)  I've found a few ways people have done this, some more complex than others....

The 555 sounds like a fine idea. However, there's a problem: I don't have a clue how to do it, at all. I'm almost a complete newbie in these things (that's why I ask for help so frequently), so bear with me here.

Quick search showed that 555 is a chip, but that's a dark forest for me as of yet.

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