• AVR Freaks

Helpful ReplyHot!PIC16F18446 Curiosity Nano board & external power

Author
DandyDon
Junior Member
  • Total Posts : 96
  • Reward points : 0
  • Joined: 2005/01/21 09:37:33
  • Status: offline
2020/04/16 09:04:37 (permalink)
0

PIC16F18446 Curiosity Nano board & external power

I have a PIC16F18446 Nano board that I'm using for a timing circuit.  I need to provide external power to the board but have some questions....
 
1.  The product users guide states the board is USB powered.  Can I power the board from a wall wart type power supply, like a 5V phone charger & not from a PC?
 
2.  The users guide states that if external power is applied I need to short the Voltage Off (VOFF) pin to ground (GND).  If I use external power in the form of a USB 5V phone charger connected to the USB connector, do I still need to short VOFF to GND?
 
Thanks in advance for any help!!
 
--Don
#1
Are
Starting Member
  • Total Posts : 9
  • Reward points : 0
  • Joined: 2020/05/04 02:38:09
  • Location: 0
  • Status: offline
Re: PIC16F18446 Curiosity Nano board & external power 2020/05/05 00:13:54 (permalink) ☄ Helpfulby judd 2020/05/17 02:43:29
0
Hello Don,
 
1) The board can be powered from any 5V USB supply, and works within the the range of the USB specification. The variable voltage supply that powers the PIC16F18446 is based on an LDO and the max voltage applied to the PIC16F18446 is always slightly lower than the USB voltage (the voltage can be set through project settings -> PKOB nano -> "Power" from the "options categories" menu. The voltage defaults to 3.3V, and any voltage set through MPLAB X is remembered, even through a power toggle.
 
2) Connecting VOFF to GND disables the on-board variable voltage supply that powers the PIC16F18446, it is only required if you intend to connect your own external power supply directly to the "VTG" pin on the board. It is not needed when a phone / wall power supply is used through the USB connector.
 
-- Are
#2
DandyDon
Junior Member
  • Total Posts : 96
  • Reward points : 0
  • Joined: 2005/01/21 09:37:33
  • Status: offline
Re: PIC16F18446 Curiosity Nano board & external power 2020/06/01 09:11:32 (permalink)
0
Sorry for the delay!
 
Thanks for your help, Are!!  That's what I needed to know.
 
#3
Jump to:
© 2020 APG vNext Commercial Version 4.5