-
Recent Posts
Projects
- Artist / hacker synergy
- ATtiny4313
- Battery Charging
- Battery Rebuilding
- Battery Tab Welder
- Child proof caps
- Cupric Chloride Etchant
- Dance shoes
- Discharge tester – Arduino and perl code
- Discharge tester – PCB build
- Electronics workbench revamp
- Embroidery
- First project – towels
- HDR
- Hilton repair
- Home Automation
- Home Repair
- Invisible clips
- LED emergency lights
- Li-ion camera battery
- Life hacking
- LiPo Conversions
- Luxeon 3W LED
- Miscellaneous
- Palm Serial Terminal
- PCB Etching
- Phone backup
- Pink LED hack
- Recording preamp/limiter
- Reflow soldering
- Rf starter's gun
- RGB LED stuff
- Robotics
- Salt spreader
- Scrolling LED
- Snow shovel handle
- Solar Panel Installation Notes
- Time-lapse photography
- Tiny 85 stuff
- toroid winding
- USB_TTL Adapters
- W88 Educubes
- Water meter reader
- WordPress
- Workshop 88 sign
- Workshop 88 Stuff
Meta
Blogroll
Links
Category Archives: Battery Rebuilding
Discharger pictures
I found my camera . It hurt, but I clipped off the daughterboard (and removed the cut off pins). There were a LOT of modifications to the board before it was done, but it seems to all work and I … Continue reading
Posted in Discharge tester - PCB build
Leave a comment
It works!
The good news is the discharge board and initial software work! Here’s a discharge of a 14 cell test battery: Battery Discharger version 0.90 Enter number of cells 1-15: Running test with 14 cells. Test ends at 13.30 volts. Press … Continue reading
Posted in Discharge tester - PCB build
Leave a comment
New cap for tab welder
The new “Volfenhag” capacitor for the battery tab welder arrived. Here is it with the old crummy red Pyramid “1.5F” cap. Doing a discharge test with a resistor, voltmeter and a stopwatch to find RC, it measured at 1.2F. Not … Continue reading
Posted in Battery Tab Welder
1 Comment
It’s a shield!
The battery discharge tester hardware is essentially complete. You can see the 15 clip leads that go to the cell connections plus the red/black heavy clips that go to the very top and bottom to carry the discharge current. The … Continue reading
Posted in Discharge tester - PCB build
1 Comment
Eeprom test
My order of ten 64Kbyte 24C512 I2C eeprom chips from China arrived. They’re SOIC (small outline IC) rather than the more traditional 0.1″x0.3″ DIP package, and the part number on the chip was unrelated to 24C512 and I couldn’t find … Continue reading
Posted in Discharge tester - PCB build
Leave a comment
Is good enough good enough?
OK – I screwed up. I missed implementing 2 features in the original board design, and now I’m paying for it trying to figure out how to hack the boards into doing what I need. The first missing feature was … Continue reading
Posted in Discharge tester - PCB build
Leave a comment
New cap on its way for battery tab welder!
The capacitive discharge battery tab welder (inspired by various web postings including ledhacks and the seminal philpem note) has been sort of on hold since I discovered the nominally 1.5F cap I bought measured at 0.3F. I had even made … Continue reading
Posted in Battery Tab Welder
Leave a comment
PCB progress
There were some bad copper bridges on the daughterboard from the “fuzzy” area spotted by someone at the PCB making demo. (I suspect it was a small bit of crud holding the artwork away from the board.) I opened those … Continue reading
Posted in Discharge tester - PCB build
Leave a comment
Discharger PCB hacks
I never think of everything in time. The analog mux chips give me 16 channels to connect to individual cells. For NiCd, that’s a max of 16*1.2V=19.2V packs. That covers almost all battery packs – great. But the discharger also … Continue reading
Posted in Discharge tester - PCB build
Leave a comment
Discharger Arduino code thoughts
One of my biggest fears for the Arduino code is that a bug will turn on inappropriate analog switches, resulting in a short or other undesired connection, probably damaging either the mux chip or the Arduino itself. To help avoid … Continue reading