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After a long break from the synth obsession, I need to get the modules I have made installed into a case and powered.

I've never found the theory side of electronics easy and I am going to have to ...

Howdy.
From what I understand it's basically Ohm's Law (R = thermal resistance.)

The best way to understand thermal dissipation is making a parallelism with electricity.
Thermal resistance Θ equ ...

Hello Fonik.

Regarding the power dissipation, there is a great difference between a LM317 based linear power supply and a Power-One one.

The LM317 regulator has a junction max operating tempera ...

The ripple at regulator's input (II): The size of the capacitor.

We have already discussed about the ripple voltage in the post "The ripple at regulator's input" in the previous page a ...

As title says, I built Backhaus (Danielson schematic) oct/hz converter to put in a Yamaha CS5.
However, the CS5 was acting very weird when it was drawing power, depending on where I was taking it f ...

hi all, hopefully a quick question.

restoring a Yamaha CS-40M. on the attached board, there are a bunch of .047uf poly caps that look like they function as bypass caps to the -15V rail, and are toa ...

If you have experience as a DIYer and electronics knowledge, I would start with Thomas Henry designs, you have very good circuits and explanations. See in Scott Stites site:
http://www.birthofasynth. ...

I'll follow this thread to see the power supply progress. Very Happy

A few comments more:

To assemble the regulator on the heat sink is convenient to use a spring washer and then you tighten the nut u ...

anyway here are links to 3 C/W heat-sinks.

Regarding the manufacturer thermal specifications:
In a set of measurements and estimations I did, I saw that the manufacturer specifications could diffe ...

Regarding the PCB layout:
I would assemble the transformer on the case, close to the PCB, instead of on the same PCB.

I have seen that your case is wood made, a very nice suitcase I have to sa ...

By the way a quick question is they a rule of thumb for the amount of ripple that is acceptable going into the voltage regulators?

A small ripple at the input of the regulators means a smaller ripp ...

Hey mrmrshoes,

I was wondering if you have time to check these numbers out?
The numbers in post 2 are OK.

However notice that you have calculated the maximum current rating of the components ...

Just to say that 3cw is for one reugulator. The same heat-sink for both regulators should be under 2cw.

Hey 4700 to 10000uf is fine. More large means more immunity to mains voltaje fluctuations.

About the heat sink , for worst case situations = 10% high mains voltaje fluctuaciones And 40C temperature ...

whats the safe margin for this?

Hey feggster thanks for post it here.

The reference of this is "The Art of Electronics" by Horowitz and Hill, where says that the current rating must be ...

Hey feggster! If there is any question about my thread I would appreciate if you can ask it there. It will help me to explain it better and in the same time we allow this thread for mrmrshoes's power ...

Hello mrmrshoes,

Also it would be good for someone else to review the schematic and PCB before I build it, just in-case I've missed or overlooked anything.
All seems OK

So with this first po ...

If the the negative terminal is not referenced to the Ground I think you could also to connect the ground to the ground terminals. Did you do it like this?

Another thing: Because you can set the ...

I would try it. I don't think that connecting two grounds can damage something.

Do you have more information about the power supplies? Model, brand, data-sheet?

not even sure where to get the probe.
http://en.wikipedia.org/wiki/Thermocouple
Most of the new DMM include a K-probe for temperature measurements. You can find one from about 20 euro. I think that ...

Glad to hear that! You achieved it! Very Happy

In manual p.8 it written that "filter should pass osc1 (res min, tune max), do you think it is like bypass?
Yes.

So I should hear pure osc1 if connect something like speakers to jack as minu ...

Many thanks on your reply. That section is ok. Also I checked oscillators on tune pots, and noise with headphones and it works too. But noise is very quite in compare of oscillators level. Next I thin ...

Are you considering the "battery saver circuit"? It disconnects the device 10-20 seconds after the last strike on the playing surface. See the service manual.

No sound at all, I tried different settings (switching oscillators, turning resonance to max etc).

Ok, so we should trace the signal from the source to the output to find where it is lost.

To ...

Author	Message
Topic: Linear Power Supply For Modular Synth Application.
Osal Replies: 40 Views: 120621	Posted: Mon Jul 06, 2015 5:05 am Subject: Linear Power Supply For Modular Synth Application. Forum: DIY Hardware and Software
Osal Replies: 40 Views: 120621	After a long break from the synth obsession, I need to get the modules I have made installed into a case and powered. I've never found the theory side of electronics easy and I am going to have to ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Tue Dec 09, 2014 4:13 am Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	Howdy. From what I understand it's basically Ohm's Law (R = thermal resistance.) The best way to understand thermal dissipation is making a parallelism with electricity. Thermal resistance Θ equ ...
Topic: Linear PSU question
Osal Replies: 11 Views: 5054	Posted: Fri Mar 28, 2014 1:40 pm Subject: Linear PSU question Forum: DIY Hardware and Software
Osal Replies: 11 Views: 5054	Hello Fonik. Regarding the power dissipation, there is a great difference between a LM317 based linear power supply and a Power-One one. The LM317 regulator has a junction max operating tempera ...
Topic: Linear Power Supply For Modular Synth Application.
Osal Replies: 40 Views: 120621	Posted: Thu Jan 30, 2014 8:25 am Subject: Linear Power Supply For Modular Synth Application. Forum: DIY Hardware and Software
Osal Replies: 40 Views: 120621	The ripple at regulator's input (II): The size of the capacitor. We have already discussed about the ripple voltage in the post "The ripple at regulator's input" in the previous page a ...
Topic: Not enough current? Common problem in adding modules?
Osal Replies: 1 Views: 1314	Posted: Fri Dec 20, 2013 6:45 am Subject: Re: Not enough current? Common problem in adding modules? Subject description: V to Hz converter messed up CS5 when drawing power. Forum: DIY Hardware and Software
Osal Replies: 1 Views: 1314	As title says, I built Backhaus (Danielson schematic) oct/hz converter to put in a Yamaha CS5. However, the CS5 was acting very weird when it was drawing power, depending on where I was taking it f ...
Topic: Help on a capacitor substitution
Osal Replies: 1 Views: 3931	Posted: Sun Dec 08, 2013 10:16 am Subject: Re: Help on a capacitor substitution Subject description: can a .047uf bypass go up or down? Forum: DIY Hardware and Software
Osal Replies: 1 Views: 3931	hi all, hopefully a quick question. restoring a Yamaha CS-40M. on the attached board, there are a bunch of .047uf poly caps that look like they function as bypass caps to the -15V rail, and are toa ...
Topic: My first DIY synth? A good first project?
Osal Replies: 12 Views: 6075	Posted: Wed Dec 04, 2013 8:34 am Subject: My first DIY synth? A good first project? Forum: DIY Hardware and Software
Osal Replies: 12 Views: 6075	If you have experience as a DIYer and electronics knowledge, I would start with Thomas Henry designs, you have very good circuits and explanations. See in Scott Stites site: http://www.birthofasynth. ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Wed Sep 11, 2013 2:20 pm Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	I'll follow this thread to see the power supply progress. A few comments more: To assemble the regulator on the heat sink is convenient to use a spring washer and then you tighten the nut u ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Sat Aug 31, 2013 8:27 am Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	anyway here are links to 3 C/W heat-sinks. Regarding the manufacturer thermal specifications: In a set of measurements and estimations I did, I saw that the manufacturer specifications could diffe ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Fri Aug 30, 2013 9:16 am Subject: Re: Thomas Henry - PSU for Electronic Music Subject description: Advice needed Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	Regarding the PCB layout: I would assemble the transformer on the case, close to the PCB, instead of on the same PCB. I have seen that your case is wood made, a very nice suitcase I have to sa ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Thu Aug 29, 2013 12:36 pm Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	By the way a quick question is they a rule of thumb for the amount of ripple that is acceptable going into the voltage regulators? A small ripple at the input of the regulators means a smaller ripp ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Thu Aug 29, 2013 11:15 am Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	Hey mrmrshoes, I was wondering if you have time to check these numbers out? The numbers in post 2 are OK. However notice that you have calculated the maximum current rating of the components ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Mon Aug 12, 2013 3:25 am Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	Just to say that 3cw is for one reugulator. The same heat-sink for both regulators should be under 2cw.
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Sat Aug 03, 2013 9:40 am Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	Hey 4700 to 10000uf is fine. More large means more immunity to mains voltaje fluctuations. About the heat sink , for worst case situations = 10% high mains voltaje fluctuaciones And 40C temperature ...
Topic: Linear Power Supply For Modular Synth Application.
Osal Replies: 40 Views: 120621	Posted: Sun Jul 28, 2013 3:21 pm Subject: Linear Power Supply For Modular Synth Application. Forum: DIY Hardware and Software
Osal Replies: 40 Views: 120621	whats the safe margin for this? Hey feggster thanks for post it here. The reference of this is "The Art of Electronics" by Horowitz and Hill, where says that the current rating must be ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Sun Jul 28, 2013 5:08 am Subject: Thomas Henry - PSU for Electronic Music Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	Hey feggster! If there is any question about my thread I would appreciate if you can ask it there. It will help me to explain it better and in the same time we allow this thread for mrmrshoes's power ...
Topic: Thomas Henry - PSU for Electronic Music
Osal Replies: 20 Views: 27060	Posted: Sat Jul 27, 2013 2:54 pm Subject: Re: Thomas Henry - PSU for Electronic Music Subject description: Advice needed Forum: DIY Hardware and Software
Osal Replies: 20 Views: 27060	Hello mrmrshoes, Also it would be good for someone else to review the schematic and PCB before I build it, just in-case I've missed or overlooked anything. All seems OK So with this first po ...
Topic: Switching Power Supply question
Osal Replies: 13 Views: 7409	Posted: Thu Jul 18, 2013 8:22 am Subject: Switching Power Supply question Forum: DIY Hardware and Software
Osal Replies: 13 Views: 7409	If the the negative terminal is not referenced to the Ground I think you could also to connect the ground to the ground terminals. Did you do it like this? Another thing: Because you can set the ...
Topic: Switching Power Supply question
Osal Replies: 13 Views: 7409	Posted: Tue Jul 16, 2013 3:08 am Subject: Switching Power Supply question Forum: DIY Hardware and Software
Osal Replies: 13 Views: 7409	I would try it. I don't think that connecting two grounds can damage something. Do you have more information about the power supplies? Model, brand, data-sheet?
Topic: Measuring current draw
Osal Replies: 27 Views: 10149	Posted: Mon Jul 08, 2013 6:20 am Subject: Measuring current draw Forum: DIY Hardware and Software
Osal Replies: 27 Views: 10149	not even sure where to get the probe. http://en.wikipedia.org/wiki/Thermocouple Most of the new DMM include a K-probe for temperature measurements. You can find one from about 20 euro. I think that ...
Topic: Synare 3 repair
Osal Replies: 19 Views: 8202	Posted: Mon Jul 08, 2013 5:45 am Subject: Synare 3 repair Forum: DIY Hardware and Software
Osal Replies: 19 Views: 8202	Glad to hear that! You achieved it!
Topic: Synare 3 repair
Osal Replies: 19 Views: 8202	Posted: Sun Jul 07, 2013 3:29 pm Subject: Synare 3 repair Forum: DIY Hardware and Software
Osal Replies: 19 Views: 8202	In manual p.8 it written that "filter should pass osc1 (res min, tune max), do you think it is like bypass? Yes. So I should hear pure osc1 if connect something like speakers to jack as minu ...
Topic: Synare 3 repair
Osal Replies: 19 Views: 8202	Posted: Sun Jul 07, 2013 3:09 pm Subject: Synare 3 repair Forum: DIY Hardware and Software
Osal Replies: 19 Views: 8202	Many thanks on your reply. That section is ok. Also I checked oscillators on tune pots, and noise with headphones and it works too. But noise is very quite in compare of oscillators level. Next I thin ...
Topic: Synare 3 repair
Osal Replies: 19 Views: 8202	Posted: Sat Jul 06, 2013 2:12 am Subject: Synare 3 repair Forum: DIY Hardware and Software
Osal Replies: 19 Views: 8202	Are you considering the "battery saver circuit"? It disconnects the device 10-20 seconds after the last strike on the playing surface. See the service manual.
Topic: Synare 3 repair
Osal Replies: 19 Views: 8202	Posted: Sat Jul 06, 2013 1:56 am Subject: Synare 3 repair Forum: DIY Hardware and Software
Osal Replies: 19 Views: 8202	No sound at all, I tried different settings (switching oscillators, turning resonance to max etc). Ok, so we should trace the signal from the source to the output to find where it is lost. To ...