I would like to significantly improve on the 12v wall wart power supply that came with a stand alone t/t motor.
Any suggestions ??.
Any suggestions ??.
Get a LED driver, or 2 Amp SMPS.
Or an old laptop supply, then LM317 to get your voltage.
How many amps does the turn table need?
317 is good to 1.5.
Or an old laptop supply, then LM317 to get your voltage.
How many amps does the turn table need?
317 is good to 1.5.
Those are all good suggestions, but do tell us what is the problem with the existing supply in that why do you need to improve on it.
Computer SMPS is big, and too powerful, old ones have degraded components, may not give good regulation.
A step down transformer, with a bridge rectifier, appropriate capacitor and 7812 regulator is good to 1 amp, provided the transformer is big enough.
So first tell us your problem.
Computer SMPS is big, and too powerful, old ones have degraded components, may not give good regulation.
A step down transformer, with a bridge rectifier, appropriate capacitor and 7812 regulator is good to 1 amp, provided the transformer is big enough.
So first tell us your problem.
Unless the TT speed is varying I would stick with it.
Otherwise you need to look on wallwart label and find out if its ac or dc and replace with higher power wallwart. Or if dc use a regulated supply.
Otherwise you need to look on wallwart label and find out if its ac or dc and replace with higher power wallwart. Or if dc use a regulated supply.
Thank you for all your reply's
The power supply is for a diy turntable under construction, I just wanted to give it a good power supply.
The input on the motor states 2 amp.
The power supply is for a diy turntable under construction, I just wanted to give it a good power supply.
The input on the motor states 2 amp.
Build, buy or salvage one.
Use very big capacitors if you do it yourself.
Physically, a heavier platter has less speed variation.
Have fun.
Use very big capacitors if you do it yourself.
Physically, a heavier platter has less speed variation.
Have fun.
"Build, buy or salvage one.
Use very big capacitors if you do it yourself."
Many thanks, could you offer s schematic for diy.
Use very big capacitors if you do it yourself."
Many thanks, could you offer s schematic for diy.
There are umpzillions of schematics already available, and designing an own one surely isn't rocket science at all. But will it be cost effective and worth the effort, as suitable wall warts are pret a porter, and cheap also?
Best regards!
Best regards!
If the pickup is of good quality, I would use a transformer based supply, as the load is constant more or less.
If your cartridge is so so or poor, the exercise becomes a waste of effort.
Then see if the motor spec shows how tolerant it is to voltage variation, and design the regulator if needed.
Otherwise a normal bridge with smoothing and pF capacitors is good enough.
SMPS could inject line noise, not really needed...wall warts for 2 amperes will be SMPS, a transformer would bee too big for a wall wart.
That is the basic supply according to me.
Now choose as per what is easily available to you in your part of the world.
If your cartridge is so so or poor, the exercise becomes a waste of effort.
Then see if the motor spec shows how tolerant it is to voltage variation, and design the regulator if needed.
Otherwise a normal bridge with smoothing and pF capacitors is good enough.
SMPS could inject line noise, not really needed...wall warts for 2 amperes will be SMPS, a transformer would bee too big for a wall wart.
That is the basic supply according to me.
Now choose as per what is easily available to you in your part of the world.
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I've implanted 24 V 0.67 A Meanwell SMPS's directly into several TT's instead of the stock transformers without any issue.
Best regards!
Best regards!
The problem in SMPS, especially in cheap unbranded wall warts, is poor design and cheap components, and also some components are left out, for example the small pF / nF capacitors that are used to filter high frequencies. So audio noise will be an issue.
So like I said, a DIY approach would be a transformer based unit.
12 V 2 A Meanwell would be around 900 here in India, about 9 Pounds of UK currency.
2 A lighting driver, about 2 pounds or less.
And DIY SMPS involves ferrite transformers, not quite everybody's cup of tea.
So like I said, a DIY approach would be a transformer based unit.
12 V 2 A Meanwell would be around 900 here in India, about 9 Pounds of UK currency.
2 A lighting driver, about 2 pounds or less.
And DIY SMPS involves ferrite transformers, not quite everybody's cup of tea.
I didn't talk about DIY'ing a SMPS for the intended purpose, as they're to be obtained quite cheaply. Instead I meant a linear PSU, if necessary.
Best regards!
Best regards!