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.
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:
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.
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 |
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 |
In real life applications we suggest to add a reset supervisor circuit to assure correct startup sequences.
Here are two possibilities:
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.
BAT-HOLDER-1 - Battery holder for lithium battery CR1220
Battery holder for lithium battery CR1220. Through hole mount.
BAT-HOLDER-2 - Battery holder for lithium battery CR1220
Battery holder for lithium battery CR1220. SMT mount.
CH23-1220 - 3V Lithium battery
Lithium battery model CR1220 at 3 volt for RTC circuitry on: