HP 41C USB Power Adapter Available? (No Batteries)

[Craig Bladow]

I'm aware of a way to power a HP-41C from a module as documented in this old forum thread.
What I would like to find is a battery holder replacement that when installed would power the HP-41C direct from a USB cable plugged in through the normal power port. I'm sure I've seen this before but does any one offer these for sale?

Cheers,
Craig

[Diego Diaz]

Hi Craig,

Although the idea behind the new Power Pack (82120D) for the HP-41 is to have a LiPo battery powered alternative to the alkalines or standard 82120A battery pack; it can also be used without the battery in the way you've described.

The 82120D project is still in progress, but I can provide you with a prototype board with no battery.

Note however that this prototype does have a micro-USB connector instead of the USB-C, it takes the USB +5v supply and feeds it into the DC/DC converter which generate the 6.4V for the HP-41.

Please PM me in case you're interested.

Best regards.

Diego.

[Craig Bladow]

Thank you Diego, PM sent.