Schematic:
3.3V/5V regulated power supply from a single AA battery.
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Schematic:
Powering a 5V ATtiny85 circuit...
Seems to work great. Screwed up the button connections, and the inductor footprint. Need to fix in next prototype. On to current draw testing now.
Just got them!
Off to board house soon...
Decided to go with the MCP1640...
Now with snapVCC done, I've rebooted this project. Need to optimise the BOM right from start. Looking at Torex for boost converters. Also need a cost effective connector...
Now that snapVCC is funded, I am getting back to AABoost. I had a very poor experience with ST Microelectronics recently. Sent them a query for which a ticket was created, and weeks later, getting no response, I sent them a tweet with the reference to which they responded as follows:
So I have decided to try and avoid STM parts in my designs. Not that it will matter to them, I suppose.
Confused on whether an LED indicator is needed...
Almost ready to send out for first prototype...
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whats next after this one? have you considered doing anything for 18650?
I sort of lost momentum as there is a very similar project on hackaday that got crowdfunded recently. The chip I've chosen doesn't supply much current, so it requires a redesign, I think...
Hi Mahesh. The BooSTick project was inspired by the Hackaday article on SnapVCC - if I had idea you were working on the same thing, we could have worked together! Anyway, they just started selling it on Adafruit. https://www.adafruit.com/products/3265
Thanks for the inspiration!
Thanks, and congratulations on the Adafruit listing!
Nice project Mahesh! Your SnapVCC inspired me to do the same thing. I'm eager to see how yours turns out! What does your peak current look like for each of the power rails? I'm at about 220 mA for 5 V, which is leaving it a bit short for the ESP8266.
Thanks! Just assembled the board today. Will test and post results.
Thanks! Should have the first prototype next week...
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output current?