1

I'm trying to build a tiny project. After I program the board, to power the dev board - how can I power it to run the code?

Question:

New Circuit enter image description here

Old Circuit enter image description here

Final Circuit

enter image description here

Improve this question

1 Answer 1

Reset to default
3

The old circuit will not work as you expect. While the ATtiny85 can run happily with 2.7 to 5.5V in this setup it expects 5V. I assume this is due to the high CPU clock setting. To run stable at a high CPU clock it requires 4.5V.

The VIN pin is connected to a linear regulator that has a 2V drop-out. Thus the supplied voltage has to be at least 2V about the target voltage. That is why the shopping page states a 5V (direct) or 7-35V (regulated at VIN) power supply.

Your LiPo charger already has a boost converter built in that boosts the battery voltage (3.0 - 4.2V) to 5V. No need to use a separate DC-DC boost converter here.

Just connect OUT+ to 5V and you are done.

Improve this answer
3
  • Thanks, so the final circuit would be correct? It would have enough power to light up standard 3mm leds connectected to the pins?
    – 3kstc
    Commented Feb 8, 2019 at 2:24
  • Yes, this is the wiring one would expect.
    – Kwasmich
    Commented Feb 8, 2019 at 7:18
  • @Kwasmisch I have one more question. Would you kindly be able to help me out please?
    – 3kstc
    Commented Feb 12, 2019 at 3:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.