Hero999
Banned
Just an idea but you could use a Joule Thief as a bootstap to allow an ordinary boost SMPS IC to work from a single AA cell draining it until it's dead.
This idea only uses the Joule Thief to get it going, once the output voltage is up to 5V the Joule Thief is shut down and the controller IC uses the output as a power supply.
This idea only uses the Joule Thief to get it going, once the output voltage is up to 5V the Joule Thief is shut down and the controller IC uses the output as a power supply.