maintenance dept
@pleasantgoose.bsky.social
st. louis/machinist/locksmith/bell system enjoyer/soldering "expert"/caretaker of contraptions/bandgap enthusiast/plant haver
the anode is of course Not Made From US Pennies. that would be illegal! these are zinc discs with holes in them.
November 21, 2025 at 2:54 AM
the anode is of course Not Made From US Pennies. that would be illegal! these are zinc discs with holes in them.
it also increased the expected voltage! neat!
November 21, 2025 at 2:46 AM
it also increased the expected voltage! neat!
this increased the short current to a whopping ~1.2mA short current! and, it eliminated the current drop upon shorting. in fact, the if left shorted for an extended period, the voltage and current rise temporarily, as if the gradient layer is being disturbed by the current flow itself. maybe?
November 21, 2025 at 2:34 AM
this increased the short current to a whopping ~1.2mA short current! and, it eliminated the current drop upon shorting. in fact, the if left shorted for an extended period, the voltage and current rise temporarily, as if the gradient layer is being disturbed by the current flow itself. maybe?
my initial battery produced the expected ~.75v but the current was limited to 0.20mA. bad! i’ve read about gradient cells before, so i added a layer of prussian blue i had lying around from some dried up cyanotype stain. it sits at the bottom of the cell near the cathode.
November 21, 2025 at 2:27 AM
my initial battery produced the expected ~.75v but the current was limited to 0.20mA. bad! i’ve read about gradient cells before, so i added a layer of prussian blue i had lying around from some dried up cyanotype stain. it sits at the bottom of the cell near the cathode.
there are many references online about prussian blue analogues being used as cathode materials in sodium batteries. this activated several brain worms, so i started with a simple zinc-air battery to test my Thoughts
November 21, 2025 at 2:25 AM
there are many references online about prussian blue analogues being used as cathode materials in sodium batteries. this activated several brain worms, so i started with a simple zinc-air battery to test my Thoughts
i’ve been thinking about batteries again,
November 21, 2025 at 2:23 AM
i’ve been thinking about batteries again,
gremolata interruptor
November 13, 2025 at 12:18 AM
gremolata interruptor
bread encounter
November 12, 2025 at 3:57 AM
bread encounter
by connecting two cars together and pressing gas and brake, you can boot the vehicle into target disk mode, allowing you to transfer files
November 11, 2025 at 10:47 PM
by connecting two cars together and pressing gas and brake, you can boot the vehicle into target disk mode, allowing you to transfer files
bamboo ps1 enclosure (unfinished wip)
November 11, 2025 at 10:28 PM
bamboo ps1 enclosure (unfinished wip)
doing some tests with cyanotype as wood stain on machined bamboo
October 12, 2025 at 4:13 PM
doing some tests with cyanotype as wood stain on machined bamboo
six diodes to rectify the output of the very small 3 phase (!) generator, an unlabeled chip that leads to the power button, and some sundry components on the back to smooth and regulate the rectified output. cannot determine Ni-MH button cell manufacturer, but 3 cells = about 3.6v
September 29, 2025 at 10:18 PM
six diodes to rectify the output of the very small 3 phase (!) generator, an unlabeled chip that leads to the power button, and some sundry components on the back to smooth and regulate the rectified output. cannot determine Ni-MH button cell manufacturer, but 3 cells = about 3.6v
remove two screws from rear steel plate, then peel rind (green=ripe)
September 29, 2025 at 10:12 PM
remove two screws from rear steel plate, then peel rind (green=ripe)
unfortunately, since the battery is already baked in, i will be breaking my streak of not using things until i’ve taken them apart
September 29, 2025 at 10:11 PM
unfortunately, since the battery is already baked in, i will be breaking my streak of not using things until i’ve taken them apart
new ikea flashlight, teardown to follow
September 29, 2025 at 10:09 PM
new ikea flashlight, teardown to follow
today was “refurb the prototype nitrogen generator into an air compressor” day
September 21, 2025 at 3:04 AM
today was “refurb the prototype nitrogen generator into an air compressor” day
i know it’s a standardized allen key but these bits are objectively funny
September 18, 2025 at 5:53 PM
i know it’s a standardized allen key but these bits are objectively funny
ikea ps 2017
+leftover bit of wood
+brass tube
+mistakenly ordered machine belt
+leftover bit of wood
+brass tube
+mistakenly ordered machine belt
September 18, 2025 at 5:20 PM
ikea ps 2017
+leftover bit of wood
+brass tube
+mistakenly ordered machine belt
+leftover bit of wood
+brass tube
+mistakenly ordered machine belt
she is examining your traces
September 9, 2025 at 2:05 AM
she is examining your traces