Engineering · 01.10.2016

2019-05-12 Update: Fixed typo in "logic table" 2019-04-05 Update: Fixed an error in the schematics: Q2, Q3 should be "B" type. The previous version had C and E swapped on Q2 (fixed in the version below). 2016-10-08 Update: Modified schematics to include additional MOSFET protection components (D3 - D6). Thanks to Eric (OceanSeaSpray) from nordkyndesign.com for pointing this out. This post describes an electronic circuit which can be used to drive latching (bi-stable) relays from a controlling...

Engineering · 18.05.2015

2016-06-30 Update: As Jim pointed out in the comments - and which was meanwhile confirmed by Balmar support - the Digital Duo is not a DC/DC charger, it is rather a switching device which will not step up voltage and hence lead to undercharging the starter battery. This device was replaced by a Sterling Pro Charge B BBW 1212 (more or less a drop-in-replacement). 2019-12-13 Update: Today I would choose the smallest Victron "Orion-Tr Smart DC-DC Charger Isolated" charger. Advantages: much smaller...