TOKO Inductors Needed for EM Theremin!

Posted: 11/28/2007 6:42:45 PM
therem13

Joined: 9/25/2007

When you say including the linear regulators, that means the capacitors and other components that go with the power supply circuit also, right?

I suppose I would have the box for the power supply near the wall outlet and then I'd run a cord with the correct DC voltage into the Theremin box. Is this what you mean? If so, that would complicate the power connectors, because I'd need one from the wall cord into the power box, one out of the power box, and then another into the Theremin.

Can I buy a "standard" power cord from Mouser or Digikey. Is this just a cord that has a three prong plug into the wall and then an output that would match the Qualtek adapters? In that case, I could just use 3 Qualtek adapters, 1 wall outlet to IEC320 standard cord, and another double ended IEC320 standard cord that goes from the power supply to the Theremin. Does this seem right?

Thanks,
Dan
Posted: 11/28/2007 10:59:53 PM
jluciani

From: Massachusetts

Joined: 8/18/2007

[i]
When you say including the linear regulators, that means the capacitors and other components that go with the power supply circuit also, right?
[/i]

Correct.

[i]
I suppose I would have the box for the power supply near the wall outlet and then I'd run a cord with the correct DC voltage into the
Theremin box. Is this what you mean? If so, that would complicate the power connectors, because I'd need one from the wall cord into the
power box, one out of the power box, and then another into the Theremin.
[/i]

Correct. It does add connectors but gives you the option of using the power supply for other [rojects. It also removes high voltage from your
main circuit board.

[i] Can I buy a "standard" power cord from Mouser or Digikey. Is this just a cord that has a three prong plug into the wall and then an output that would match the Qualtek adapters?
[/i]

You could buy a "standard" power cord from Mouser or Digikey. You probably have quite a few around your house.

[i] In that case, I could just use 3 Qualtek adapters, 1 wall outlet to IEC320 standard cord, and another double ended IEC320 standard cord
that goes from the power supply to the Theremin. Does this seem right?
[/i]

[b]NO. NO. NO.[/b]

Do not use the Qualtek Adapters for any voltage other than what they are specified for!!! The IEC320 is a standard for 120VAC [b]ONLY[/b]. It can be very dangerous to violate this convention. I believe that the multiple output DC supplies come with a 5-pin DIN connector. Try to find something like that.

(* jcl *)

Posted: 11/29/2007 7:31:14 AM
therem13

Joined: 9/25/2007

What type of PC Board do you recommend using for the circuit in the power supply box?

Is it correct if I get 1 IEC320 power cord and adapter for the wall into the power supply, and then I can run the 5 pin DIN cord with connector out of the power supply box and into the Theremin?

I don't think I have any power cords at home that look like the IEC320 or match the Qualtek adapter. Am I overlooking something?

For a cord, is the http://www.mouser.com/catalog/632/948.pdf design D from here ok to go from the wall to power supply box? It's mouser part# is 562-212004-01.

How should I go about finding the 5 Pin DIC DC cord and adapter? I'm not sure about the category it would be under.
Posted: 11/29/2007 7:47:28 AM
jluciani

From: Massachusetts

Joined: 8/18/2007

[i]What type of PC Board do you recommend using for the circuit in the power supply box?[/i]

Use the same vectorboard that you use for the main circuit board.

[i]Is it correct if I get 1 IEC320 power cord and adapter for the wall into the power supply, and then I can run the 5 pin DIN cord with connector out of the power supply box and into the Theremin?[/i]

You could have a cord coming out of the power supply or you could
mount a DIN connector to the power supply case.

[i]I don't think I have any power cords at home that look like the IEC320 or match the Qualtek adapter. Am I overlooking something?[/i]

Your PC ;-) The cord going into your PC would probably work.


[i]For a cord, is the http://www.mouser.com/catalog/632/948.pdf design
D from here ok to go from the wall to power supply box? [/i]

That looks correct.

[i]How should I go about finding the 5 Pin DIC DC cord and adapter? I'm not sure about the category it would be under.[/i]

The easiest way I have found is to browse the printed catalog. It is much easier to thumb through the pages then try to determine the
appropriate terms to use in the search software. The Digikey search is *much* better than the Mouser.

(* jcl *)
Posted: 11/29/2007 4:51:35 PM
therem13

Joined: 9/25/2007

Will I need to get a second Vectorboard, or could I cut the one I'm getting? If I needed a new one, is there a smaller one with the same hole style and layout?

I'd like to mount a DIN connector on the power supply case as well as the Theremin, and then have a cord that would connect the two together. Is this setup possible/ can these parts be found at Digekey or Mouser?

Are these power supply 5 Pin DIN connectors the same ones that can be found at RadioShack that are used for TVs and Cable internet/ TV?

Is wood an ok material for the power supply box?

There are several different terminal styles for the Qualtek 703W-00/08 connector. Should I get the solder tab, or one of the other ones (".250 QD" or ".187 Q.D./Solder"?

Thanks

Posted: 11/29/2007 4:57:07 PM
therem13

Joined: 9/25/2007

This audio cable isn't what I'm looking for to go in between the power supply and Theremin, is it?

http://www.radioshack.com/product/index.jsp?
productId=2103840&
cp=2032058&f=Taxonomy%2FRSK%2F2032058&
categoryId=2032058&kwCatId=2032058&
kw=din&
parentPage=search
Posted: 11/29/2007 7:52:03 PM
therem13

Joined: 9/25/2007

The voltage regulator ICs came. They seem unbelievably small. Also, what is the protocol for handling electrostatic sensitive ICs?
Posted: 11/29/2007 8:02:00 PM
therem13

Joined: 9/25/2007

I've found a possibly better DIN 5 pin cable that has male and female instead of just male: http://www.amazon.com/Molded-Extension-Cable-Male-Female/dp/tech-data/B000A8QJ0C/ref=de_a_smtd/103-5157739-7229459?ie=UTF8&qid=1196384404&sr=8-2

Would this work, or are the instrumental cables not ok for power?
Posted: 11/29/2007 8:16:14 PM
jluciani

From: Massachusetts

Joined: 8/18/2007

The Theremin draws very little current so the
instrument cables should be fine. If you are going to use the power supply for other devices you may want to look at other cable options. For cable ideas you could look at the type of cables that are used with the multi-output wall adapters.

For ICs you should use a ground strap. Look in
the Digikey and Mouser catalogs. For handling
instructions take a look at the IC manufacturers
site.

(* jcl *)
Posted: 11/29/2007 8:21:51 PM
therem13

Joined: 9/25/2007

I've found that cable and several DIN connectors, but I think that different companies have different ways of configuring the 5 pins. I'll have to just get some that match.

What's a good material for the power supply box?

Do you recommend using an IC socket for the voltage regulators?

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