I want to power a Teensy 2.0++ externally with 4 AA batteries and still use USB power when connected to the USB port. I've read the documentation using option 3 which snips the 5.v pad lead and adds 2 1N5817 diodes, one between the pads, and one inline with the battery's positive lead.
I want to use either 4 alkaline(1.5v) or 4 Enloopes NiMh(1.2v) batteries. I want the chip to run at 16Mhz.
Will both these battery options work???
The akalines will provide 6 volts minus the .3 volts drop over the diode = 5.7 volts...is this too much?
The Enloops will only provide 4.8volts minus .3 volts = 4.5 volts...is this too little?
What happens when I plug in the USB 5-volt cable when the 5.7 volt alkalines are there too?
I guess USB 5v will be powering the USB components and the alkalines will be powering the rest of the chip??????
On the other hand, if Enloops are installed, I guess the 5-volt USB would be powering everything?
Any info would be greatly appreciated.
I want to use either 4 alkaline(1.5v) or 4 Enloopes NiMh(1.2v) batteries. I want the chip to run at 16Mhz.
Will both these battery options work???
The akalines will provide 6 volts minus the .3 volts drop over the diode = 5.7 volts...is this too much?
The Enloops will only provide 4.8volts minus .3 volts = 4.5 volts...is this too little?
What happens when I plug in the USB 5-volt cable when the 5.7 volt alkalines are there too?
I guess USB 5v will be powering the USB components and the alkalines will be powering the rest of the chip??????
On the other hand, if Enloops are installed, I guess the 5-volt USB would be powering everything?
Any info would be greatly appreciated.