Hello,
I have tried to use an external power source to power my Teensy LC. I soldered together a cable with a USB male on one side and a DC jack on the other. I cut the VIN VUSB lead as instructed on the main site, and connected the 5V pin to 5V coming from a 5V 1A powerbank and the GND pin to ground.
Unfortunately I ended up cooking 2 Teensy LCs in the process, and I can't figure out why. The powerbank provides 5V on my voltmeter initially and then drops to 2.3V after a about 15 seconds (this behavior was described here https://forum.pjrc.com/threads/24476-Portable-Power-Supply?p=37126&viewfull=1)
But what I don't understand is why this would kill a Tennsy LC. Do power banks have unpredictable voltage swings that could kill a Teensy? SHould I use a Teensy 3.2 that has voltage regulator in it?
I'm fairly new to all this, perhaps a power bank is not a smart solution for an external power source and I should look towards a different power source? What do people us for a 5V input to a Teensy that is portable?
Thanks to anyone with any insight into these issues!
Best,
Leo
I have tried to use an external power source to power my Teensy LC. I soldered together a cable with a USB male on one side and a DC jack on the other. I cut the VIN VUSB lead as instructed on the main site, and connected the 5V pin to 5V coming from a 5V 1A powerbank and the GND pin to ground.
Unfortunately I ended up cooking 2 Teensy LCs in the process, and I can't figure out why. The powerbank provides 5V on my voltmeter initially and then drops to 2.3V after a about 15 seconds (this behavior was described here https://forum.pjrc.com/threads/24476-Portable-Power-Supply?p=37126&viewfull=1)
But what I don't understand is why this would kill a Tennsy LC. Do power banks have unpredictable voltage swings that could kill a Teensy? SHould I use a Teensy 3.2 that has voltage regulator in it?
I'm fairly new to all this, perhaps a power bank is not a smart solution for an external power source and I should look towards a different power source? What do people us for a 5V input to a Teensy that is portable?
Thanks to anyone with any insight into these issues!
Best,
Leo