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  #1  
Old 08-16-2012, 10:33 AM
Freelander Freelander is offline
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Lightbulb Enhanced MFD beased on DDS

Hi to all,

I'am working on the Carl's MFD project, and I need to improve this device with a DDS (Digital Direct Synthesis),

see diagram:


Thanks to share your experience on this subject.


Many thanks
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  #2  
Old 08-16-2012, 10:44 AM
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What's your opinion on this basic shematic?
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Old 08-16-2012, 11:23 AM
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Let's make lock on this DDS kind found on Ebay:
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Old 08-16-2012, 01:00 PM
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At my MFD i use the TDA 2030 for more power.
The DDS that you show is OK.
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Old 08-17-2012, 06:50 AM
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Default Using TDA2030 14W HIFI Audio amplifier

Thanks ***Geo*** for sharing info, here your answer on the schematic.


Thanks to check here the Vs and V input, from your experience, to get those 2 values simultaneity do you use serial batteries?




I'm waiting feedback friends
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  #6  
Old 08-17-2012, 07:09 AM
Freelander Freelander is offline
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Default TDA2030 datasheet

Here the TDA2030 datasheet of parameters and standard schematic.
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Old 08-17-2012, 11:57 AM
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Quote:
Originally Posted by Freelander View Post
Thanks ***Geo*** for sharing info, here your answer on the schematic.


Thanks to check here the Vs and V input, from your experience, to get those 2 values simultaneity do you use serial batteries?




I'm waiting feedback friends
Be careful the V+ of DDS !!!!!
I think that at your schematic the Vin is the power supply.
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Old 08-17-2012, 12:29 PM
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Default 5V ... 18V

Thanks Geo for following,

Here the DDS input required is 5V, and for Tda2030 I think better use 18V, this requir 2 different power supply values.

I'm ready to modify what you purpose,
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  #9  
Old 08-18-2012, 09:22 AM
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Default Rectified schematic

Here the rectified schematic, what do you think **Geo**

(I'think that am not very lucky to start project in summer holidays season )
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Old 08-18-2012, 11:22 AM
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Quote:
Originally Posted by Freelander View Post
Here the rectified schematic, what do you think **Geo**

(I'think that am not very lucky to start project in summer holidays season )
I prefer to put a 7805 at 18V and connect the output to the DDS
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  #11  
Old 08-18-2012, 12:39 PM
Freelander Freelander is offline
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Post with 7805

Here the update ***Geo***,

(only the changed part, to not charge the topic by unneeded data )


Many thanks my dear.
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Old 08-19-2012, 10:48 AM
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Quote:
Originally Posted by Freelander View Post
Here the update ***Geo***,

(only the changed part, to not charge the topic by unneeded data )


Many thanks my dear.
Connect 7805 to +18V, no to 9V.
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  #13  
Old 08-20-2012, 08:00 AM
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Many thanks ***Geo***

Ok, I will use 12V rechargeable battery 1300MA.H, it's can be good?

So what's the minimum voltage that can maintain stable the TDA2030, cause I need to adjust the Zener diode.

from datasheet this chip request +-6V =>12V.
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  #14  
Old 08-20-2012, 03:35 PM
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Quote:
Originally Posted by Freelander View Post
Many thanks ***Geo***

Ok, I will use 12V rechargeable battery 1300MA.H, it's can be good?

So what's the minimum voltage that can maintain stable the TDA2030, cause I need to adjust the Zener diode.

from datasheet this chip request +-6V =>12V.
Zener, led and press switch are as battery indicator. So you don't need them.
General.... for the TDA2030 i prefer a voltage of 14...24V.
The choise is your.
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Old 08-20-2012, 11:36 PM
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Default adding transformer ferrite core

Hi friend,
Yes this is optional, but this device is very sensual, and at least it's preferable to have an indicator/idea of power.

With your council, witch "transformer with ferrite core" can I use?
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  #16  
Old 08-21-2012, 05:33 AM
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Hi.
No ned for ferrite transformer.
A simple transformer with iron core is OK.
A 230v/ 12V-3A is ok.
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  #17  
Old 08-21-2012, 01:13 PM
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Here the final schematic, many thanks dear ***Geo***

The 220v pole will be connected to bras earth, Geo? if we accept the input/output yield.
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  #18  
Old 08-21-2012, 03:20 PM
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Quote:
Originally Posted by Freelander View Post
Here the final schematic, many thanks dear ***Geo***

The 220v pole will be connected to bras earth, Geo? if we accept the input/output yield.
You don't need C4.....
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  #19  
Old 08-21-2012, 03:23 PM
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Quote:
Originally Posted by Freelander View Post
Here the final schematic, many thanks dear ***Geo***

The 220v pole will be connected to bras earth, Geo? if we accept the input/output yield.
You must change the tranformer....
The 12V side must connected to TDA2030 and the 230V side to earth...
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  #20  
Old 08-21-2012, 06:23 PM
Freelander Freelander is offline
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Quote:
Originally Posted by Geo View Post
You must change the tranformer....
The 12V side must connected to TDA2030 and the 230V side to earth...
Yes friend, this is the input/output transformer yield, only I did not prefer to write 12v/220v to not mix with a converter.

Many thanks ***Geo***
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