Hi,
We are planning to create a shield that will have an MBUS slave chip (TSS721A) that is connected to a energy meter that can provide up to 700mW to the MBUS slave.
Is it possible to power the Grand Central M4 from a shield if no USB or external powersupply is attached. If so what PINs and what voltages should I use?
Powering Grand Central M4 from shield
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- Solcellespesialisten
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- adafruit_support_bill
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Re: Powering Grand Central M4 from shield
You can supply 5v-12v power from the shield via the VIN pin.
https://learn.adafruit.com/adafruit-gra ... -3015119-3
https://learn.adafruit.com/adafruit-gra ... -3015119-3
- Solcellespesialisten
- Posts: 3
- Joined: Tue Mar 30, 2021 8:25 am
Re: Powering Grand Central M4 from shield
Thanks.
I was unsure since I did not measure any connection between the external power connection and Vin when external power was disconnected.
I was unsure since I did not measure any connection between the external power connection and Vin when external power was disconnected.
- adafruit_support_bill
- Posts: 88154
- Joined: Sat Feb 07, 2009 10:11 am
Re: Powering Grand Central M4 from shield
There is a diode and MOSFET switch between the DC input jack and the VIN pin. That is used to detect which power source (USB or DC jack) to connect to VIN.
Please be positive and constructive with your questions and comments.