A little HW-mod for U-Box and others

[joolsthebear]

Here is a little modification for my Tronfy R89 Ubox , easy to make for everyone with little soldering skills (i make also a little bit longer wire on the microphone ).

Works great to switch into masked rom mode ... ive soldering only a little push button on the 2 recovery pins

[digitalriver]

And my not very little, but modification for Ubox

[joolsthebear]

Whow, nice one ^^ ... what is the modification on the right side ? A mod for the power source ?

[digitalriver]

Whow, nice one ^^ ... what is the modification on the right side ? A mod for the power source ?

I lowered the supply voltage for the fan Diodes instead of resistors.Because the fan is very noisy from 5 volts.
Without fan - was heated to 90 degrees Celsius in games(Asphalt8, etc) with fan - 55. Video playback - 35-40. Very good results, i think

[joolsthebear]

Sounds good, im thinking of a similar modification .

[no_spam_for_me]

I'm thinking about something like this
http://www.****.de/itm/251195052677?...%3AMEBIDX%3AIT
or
http://www.****.de/itm/300703688714?...%3AMEBIDX%3AIT
at the backside of the case (depends on which will fits)...
And maybe also http://airpax.sensata.com/pdfs/6700.pdf e.g. http://www.digikey.com/product-detai...192-ND/1631959
... if I find a little bit time for it

[joolsthebear]

I would place it directly on the heatsink like shown, because the litte air holes on the back side, i think are not very effective ... remove the grid on the backside might be an option, but then you need a really silent fan ...

[no_spam_for_me]

No, no, I will make a big hole and place the fan at it (inside the case)

[digitalriver]

[QUOTE = joolsthebear; 275947] Я бы на месте его непосредственно на радиаторе, как показано на рисунке, потому что Litte воздушные отверстия на задней стороне, я думаю, не очень эффективны ... удалить сетку на спинках может быть вариант, но затем Вы должны действительно тихий вентилятор ... [/ QUOTE]
I increased the size of the holes too....

[joolsthebear]

looks promising

[Gormar]

And my not very little, but modification for Ubox

I think you risk to much soldering in such proximity to SM capacitor when there is USB port just below (in your picture above) that place whose 5V pad/"hole" is connected to it.


Question: Is your fan working with just only about 4,2V? These Ge diodes should have conduction voltage drop between 0,2-0,3V at 10-20mA current. You could have half number of diodes when use one with Si junction rather than Ge.

[digitalriver]

I think you risk to much soldering in such proximity to SM capacitor when there is USB port just below (in your picture above) that place whose 5V pad/"hole" is connected to it.
Question: Is your fan working with just only about 4,2V? These Ge diodes should have conduction voltage drop between 0,2-0,3V at 10-20mA current. You could have half number of diodes when use one with Si junction rather than Ge.

Those are Si diodes with 0.7V drop each. First Im used 4 diodes, but not always starts fan(very low voltage). Finally Im used only 3 diodes - work fine and quiet.

[Gormar]

@digitalriver. What kind of FAN did you use? Isn't it supposed to work at 12V?

I've got one for 12V and 0.05A nominal current and it is virtually inaudible at 5V.

[digitalriver]

@digitalriver. What kind of FAN did you use? Isn't it supposed to work at 12V?

I've got one for 12V and 0.05A nominal current and it is virtually inaudible at 5V.

5V, 1 Wt(fan was text on bottom size.) Made in China, manufacturer - unknow. Very cheep(3 usd in Ukraine)
R89 dont have 12v on board.

[Gormar]

R89 dont have 12v on board.

I'm aware of that. But I use 40mm 12V FAN connected to onboard USB "port" (5V) without problem. Although only two from three 12V FAN tested by me worked in this conditions.