Enterprise Forever
:UK => Hardware => Topic started by: gflorez on 2014.January.24. 12:31:16
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A few months ago, searching the Web, I found a switching power suply replacement for the hot 7805, the DE-SW050(Dimension Engenieering). It is only a little bigger than the 7805 IC and gives better characteristics whit the same pinout.
As a proof of concept I've installed it on a Spectrum, discarding the heatsink!, and it now works perfectly at ambient tempeature...
I've also replaced the regulator in my EXDOS card, now powering the HXC Floppy Emulator.
For now I will not change the internal regulator of my EP, as I fear for the keyboard membrane keyboard. (I already broke them on the Spectrum and had to put a new one)
On the other hand it cost each 15$ (+1.25$ shipping) but I think is a good investment in our loved machines to get them more cold....
This is the Web page of the company where they sell worldwide:
http://www.dimensionengineering.com/products/de-sw050
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I've been always searching for better, colder & cheap 7805 replacements. This one looks great; but I still think that the Tracopower (http://www.newark.com/tracopower/tsr-1-2450/dc-dc-conv-non-iso-pol-1-o-p-1a/dp/08R5932?MER=PPSO_N_C_EverywhereElse_None) is the perfect choice. It also seems to be cheaper, about $9 each :-)
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You're right, I didn't know that.
I bought a few of the other so, I'll keep that reference.
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Tienes razón, no conocía ese.
He comprado unos cuantos del otro, , así que guardaré la referencia.
Gracias. ¿Donde los compras?
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(OFF topic: Write your posts both in English and in Spanish, I like reading them in both languages!
Escribid vuestros mensajes en inglés y español también, me gusta los leer en ambas lenguas. )
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No problem with me.
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Por mi no hay problema.
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I've been always searching for better, colder & cheap 7805 replacements. This one looks great; but I still think that the Tracopower (http://www.newark.com/tracopower/tsr-1-2450/dc-dc-conv-non-iso-pol-1-o-p-1a/dp/08R5932?MER=PPSO_N_C_EverywhereElse_None) is the perfect choice. It also seems to be cheaper, about $9 each :-)
This is my solution. The step-down converter about 1.4$ from ebay.
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Beware that cheap chinese DC-DC converters, they'are far from good and usually lack of extra safety circuitry. They usually tend to generate a lot of noise in the 5V line...
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Yes, I had an experience with this. I had to build one plus 1000uF to the motherboard, to keep noise below 20mV. After all, it seems to works well.