Power supply

Aria G25 needs a single line 3.3 volt DC power supply which can be provided in any combination on the following pins:

Power lines	Aria pins
+3V3 DC power in	N1, S1, E24, W24
GND signal ground	N24, S24, E1, W1

A simple and cheap module called PS3V3 is available from Acme SYstems.
It has a miniUSB connector and can be integrate in your PCB as a SMD component.

EUR 4.00

PS-5V1A-EU-MUSB - Switching power supply with UE AC Plug and mini USB DC plug

Switching power supply for PS3V3 DC/DC converter module:

Input 100-240VAC 50/60Hz
Output 5VDC/1A
Pluggable directly to the Berta Board or PS3V3

Extended range power supply

If you need to get the power in an industrial or mobile environment here is illustrated a simple solution using this two modules:

In this way is is possible to provide to Aria from a 7 to 28 Volt DC source.

EUR 10.00

NETUSPS1 - Quad power supply module

Power supply module that meets all the AT91SAM9G20 CPU power requirements and power-up and power-down sequences to guarantee reliable operations.

| Product description |

EUR 12.00

EPS - Extended Power Supply module

EPS is a DC-DC converter with an input range of 7 to 28 Volt DC output 5 Volt DC @ 2A.

| Product description |

Power supervisor

In real life applications we suggest to add a reset supervisor circuit to assure correct startup sequences.

Here are two possibilities:

Using a TPS3808G33 IC more flexible since it lets you to program the reset assertion delay with C52.
Using a CAT811 IC that is cheaper but has a fixed 140ms delay.

Reset supervisors

RTC backup battery

Applying 3 Volt DC on E1 (GND) and E20 (VBAT +3VDC) it is possible to mantaint the RTC (Real Time Clock) active when the power supply if off. This will mantain the system clock up to 6 months with no power using a small CR1220 Lithium battery.

A bigger battery can be used to extend the time duration.