Brother PT-H100LB Label maker USB PD conversion
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3D Printed 'battery' with terminals connected to a PD trigger PCB.
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Dummy battery with metal connectors made out of M4 screws. Connect to a power source and use the label maker without wasting batteries. Tested on PT-H100LB. Might fit similar models. Standard uses 6x AAA batteries.
Materials:
2x M4x25 screws
6x M4 nuts
4x M4 washers
USB-C PD trigger (configured to 9v, soldering may be required)
Spade crimp connectors
Some wire
I got this PD trigger:
https://www.aliexpress.com/item/1005005324613468.html
How-to:
Put two M4 nuts in the nut traps.
Screw in the lower screw all the way, add a nut, washer, washer, nut.
Add a nut, washer, washer, nut on the upper screw. Screw it in. Let it stick out ~3mm. Adjust for good contact.
Solder + and - on the PD trigger, crimp the other end of the wire to spade connectors, secure them between the washers using the nuts.
Pay attention to the direction of the screws.
I drilled some holes in the side of the label maker, then cut a slot with an x-acto knife.
Glued in.