Power supply on 5V pin / 3.3V pin

Discussion about Z-Uno product. Visit http://z-uno.z-wave.me for more details.
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dom
Posts: 5
Joined: 26 Aug 2016 21:49

Power supply on 5V pin / 3.3V pin

Post by dom » 31 Aug 2016 23:54

Can we directly connect a 5V power supply to 5V pin ?
Same question for 3.3V pin (with a 3.3V power supply) ?

In the 5V case how many mA can be used on the 3.3V PIN (in order to supply other 3.3V compoments) ?

Thanks

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PoltoS
Posts: 4348
Joined: 26 Jan 2011 19:36

Re: Power supply on 5V pin / 3.3V pin

Post by PoltoS » 01 Sep 2016 02:42

Yes, you can connect power to 5V or 3V3 pins directly

For 5->3.3 DC-DC we use MCP1700. It can source up to 250 mA total

hatchet
Posts: 4
Joined: 08 Sep 2016 21:20

Re: Power supply on 5V pin / 3.3V pin

Post by hatchet » 20 Sep 2016 16:03

PoltoS wrote:Yes, you can connect power to 5V or 3V3 pins directly

For 5->3.3 DC-DC we use MCP1700. It can source up to 250 mA total
I want to supply Z-Uno with 12V, supplied to pins 1 and 3 (7-18V input / gnd).
The plan is to use Z-Uno's DCDC converter to supply peripheral components (like MAX3232) from 3V3 output. Can I do that?

Are there schematics available from the Z-Uno board (not just pinout)?

Thanks,

Rob

Quikdav
Posts: 9
Joined: 08 Sep 2016 22:06

Re: Power supply on 5V pin / 3.3V pin

Post by Quikdav » 22 Sep 2016 19:51

PoltoS wrote:Yes, you can connect power to 5V or 3V3 pins directly

For 5->3.3 DC-DC we use MCP1700. It can source up to 250 mA total
it's a good news to be able to avoid micro USB as power input ;-)

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