Casella - Microdust

Aerosol monitoring System. Interesting product, dust particle counter.

Symptoms - Issue dead rechargeable batteries.

Solution - Requirements 3 voltage inputs. knocked up a replacement battery unit. x3 lithium-ion cells, x1 S3 BMS to manage charging and protection. polished off with two DC-DC buck converters for voltage output. Not a bad work considering, will be making more of these units for order and personal use .