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Project: Mini-D Summary: Mini-D is a desulfator designed to be used with 12V lead-acid batteries. This device can restore new life to batteries which have been sitting without a charge for extended periods of time. Desulfation removes sulfur crystals that have formed around the lead plates. On a 12V battery sulfur crystals begin to form when a battery is stored at a voltage of less than 12.3V. These crystals are undesirable as they cause resistance within the battery which eventually leads to a battery unable to pass current. Mini-D breaks the crystals by emitting a high frequency / high voltage / low power pulse which creates a resonance inside the battery. I have desulfated and sold dozens of lead-acid batteries. A batteries improvement can be measured by applying a load to the battery periodically and watching the voltage drop. A 60lb battery will take roughly three weeks to desulfate. Video:
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Parts:
Files:
- schematic (pdf)
- src (html)
- src (bz2 tarball)
- gerbers (zip)
- schematic (gschem format)
- pcb (pcb format)
Questions:
