Hi.
What is going to be delivered in case I will order snickerdoodle + piSmasher boards? Only boards without any cables or power supply unit?
Best Regards,
Alex.
Hi Alex,
Good question. That's correct - a snickerdoodle + piSmasher order would include the boards only. Wall warts, jumpers, and other accessories would be 'extra.'
Note: the new piSmasher design will allow the board to be powered via the J2 breakout, so you don't necessarily *need* a wall wart to power the baseboard.
-Ryan
On Thursday, October 6, 2016 at 11:26:46 PM UTC-7, lgerp.alex@gmail.com wrote:
On Thursday, October 6, 2016 at 11:26:46 PM UTC-7, lgerp.alex@gmail.com wrote:
Hi.What is going to be delivered in case I will order snickerdoodle + piSmasher boards? Only boards without any cables or power supply unit?Best Regards,Alex.
Hi Ryan.
OK, then what kind of wall wart we need to use? 9V is OK? What is maximum current that may be required from wall wart? As I see on your site you are offering 3A wall wart. Does it mean 2A will not be enough?
On the same page as they sell the wall wart it lists "5V via microUSB or 3.7V-17V via power pins" for each model. Amperage required is going to depend on your usage - I'd guess 2 would get you by unless you wanted to use all of the programmable logic and a bunch of baseboards at the same time.
On Sunday, October 9, 2016 at 6:13:18 AM UTC-4, lgerp...@gmail.com wrote:
On Sunday, October 9, 2016 at 6:13:18 AM UTC-4, lgerp...@gmail.com wrote:
Hi Ryan.OK, then what kind of wall wart we need to use? 9V is OK? What is maximum current that may be required from wall wart? As I see on your site you are offering 3A wall wart. Does it mean 2A will not be enough?
Thanks, didn't notice that words about voltage.
Regarding amperage. None PSU are perfect. If it is states it will give 2A, it may give less in reality. Moreover it will be sad to realize at some moment that 2A is not enough and you need to buy one more PSU with 3A.
So, looks like better to buy 3A.
Thanks everyone!
понедельник, 10 октября 2016 г., 7:55:31 UTC+7 пользователь Daniel Smith написал:
понедельник, 10 октября 2016 г., 7:55:31 UTC+7 пользователь Daniel Smith написал:
On the same page as they sell the wall wart it lists "5V via microUSB or 3.7V-17V via power pins" for each model. Amperage required is going to depend on your usage - I'd guess 2 would get you by unless you wanted to use all of the programmable logic and a bunch of baseboards at the same time.
On Sunday, October 9, 2016 at 6:13:18 AM UTC-4, lgerp...@gmail.com wrote:Hi Ryan.OK, then what kind of wall wart we need to use? 9V is OK? What is maximum current that may be required from wall wart? As I see on your site you are offering 3A wall wart. Does it mean 2A will not be enough?
I was actually the one who specified the 36 Watt AC/DC adapter (12V@3A).
This is based on an extreme worst case for the snickerdoodle and a theoretical baseboard with a bunch of stuff plugged in.
The snickerdoodle has a 1.0V core supply rated to 5A (5W).
A 1.8V AUX/MIO supply rated to 1A (1.8W)
A 3.3V VIO/RF supply rated to 3A (9.9W) -- 3.3W of this capacity is available for accessories and I/O and about 3.3W is committed to the worst case instantaneous radio power consumption.
So all together we have 5W+1.8W+9.9W at say 90% efficiency which is 19W.
On a baseboard that has a Gigabit Ethernet transceiver you might see 0.5W for that.
As for USB if you have a HS USB PHY+HUB that might require 0.25W plus another 2.5W per port (5V@0.5A) for attached accessories. In the case of the piSmasher that would be a total of 10.25W
The NXP HDMI transmitter and NXP HDMI receiver at full throttle on the piSmasher theoretically could consume 1.7W together.
So 0.5W+10.25W+1.7W at 90% efficiency is another 14W and together with the worst case 19W above that puts you at 33W which is definitely in the 36W adapter category.
The idle power on the snickerdoodle running linux is around 1W and with some platform controller tricks you can sleep the entire system around 15 mW.
So keep in mind all of these numbers are pretty much extreme worst case numbers with lots of accessories and everything running at maximum performance.
That's just how we roll.
-Jamil
On Sunday, October 9, 2016 at 8:26:06 PM UTC-7, lgerp...@gmail.com wrote:
This is based on an extreme worst case for the snickerdoodle and a theoretical baseboard with a bunch of stuff plugged in.
The snickerdoodle has a 1.0V core supply rated to 5A (5W).
A 1.8V AUX/MIO supply rated to 1A (1.8W)
A 3.3V VIO/RF supply rated to 3A (9.9W) -- 3.3W of this capacity is available for accessories and I/O and about 3.3W is committed to the worst case instantaneous radio power consumption.
So all together we have 5W+1.8W+9.9W at say 90% efficiency which is 19W.
On a baseboard that has a Gigabit Ethernet transceiver you might see 0.5W for that.
As for USB if you have a HS USB PHY+HUB that might require 0.25W plus another 2.5W per port (5V@0.5A) for attached accessories. In the case of the piSmasher that would be a total of 10.25W
The NXP HDMI transmitter and NXP HDMI receiver at full throttle on the piSmasher theoretically could consume 1.7W together.
So 0.5W+10.25W+1.7W at 90% efficiency is another 14W and together with the worst case 19W above that puts you at 33W which is definitely in the 36W adapter category.
The idle power on the snickerdoodle running linux is around 1W and with some platform controller tricks you can sleep the entire system around 15 mW.
So keep in mind all of these numbers are pretty much extreme worst case numbers with lots of accessories and everything running at maximum performance.
That's just how we roll.
-Jamil
On Sunday, October 9, 2016 at 8:26:06 PM UTC-7, lgerp...@gmail.com wrote:
Thanks, didn't notice that words about voltage.Regarding amperage. None PSU are perfect. If it is states it will give 2A, it may give less in reality. Moreover it will be sad to realize at some moment that 2A is not enough and you need to buy one more PSU with 3A.So, looks like better to buy 3A.Thanks everyone!
понедельник, 10 октября 2016 г., 7:55:31 UTC+7 пользователь Daniel Smith написал:On the same page as they sell the wall wart it lists "5V via microUSB or 3.7V-17V via power pins" for each model. Amperage required is going to depend on your usage - I'd guess 2 would get you by unless you wanted to use all of the programmable logic and a bunch of baseboards at the same time.
On Sunday, October 9, 2016 at 6:13:18 AM UTC-4, lgerp...@gmail.com wrote:Hi Ryan.OK, then what kind of wall wart we need to use? 9V is OK? What is maximum current that may be required from wall wart? As I see on your site you are offering 3A wall wart. Does it mean 2A will not be enough?