Uploaded October 2025 | Updated September 2026, 3 days ago

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Improving the thing by exchanging some resistors (and removing a diode) …
↓↓↓ Complete description, time index and links below ↓↓↓

Several weeks ago we reversed engineered the basically unusable battery indicator of the Haswing Protruar 2.0 24V and came up with some modifications to improve it (link below). Now I got the parts and we can get to work.

First we recap of the planned improvement. After that we exchange nine SMD resistors and do a test, which fails miserably. During the following troubleshooting we find a “surprise” diode and after removing it everything works as expected.

00:00 Intro – after reverse engineering, we’ll improving
00:54 Recap – the current circuit and how to improve it
02:57 SMD soldering – nine 0805 resistors (2012 metric)
09:15 Disappointment – all voltages are 0.7V to high
11:51 Troubleshooting – the M1 polyfuse is a diode!
16:54 Solution – get rid of the diode, it’s useless anyway
19:08 Success – LEDs switch on at the exact voltages
20:43 Wrap-up – next we’re back to fly-by-wire, bye

Teardowns youtube.com/playlist?list=PLwq-2MnM58FJPg01ooMBgy_CxDxAem0my
Haswing Protruar 2.0 24V Trolling Motor – Unboxing and First Impressions youtu.be/DSgi4pclBUA
Haswing Protruar 2.0 24V Trolling Motor – Teardown & Reverse Engineering youtu.be/I8f8282jB8g
Haswing Protruar 2.0 24V Trolling Motor – More Reverse Engineering youtu.be/RAsr5ENhv88
Haswing Protruar 2.0 24V Trolling Motor – Further Teardown youtu.be/Fr-SQFcZ-08
Haswing Protruar 2.0 24V Trolling Motor – Reverse Engineering Errata youtu.be/wXfeN3VplFE
Haswing Protruar 2.0 24V Trolling Motor – Battery Indicator Circuit youtu.be/tZmjgyAoL4c

#reverseengineering #teardown #teardowns #haswing #trollingmotor #outboardmotor #outboard #robertssmorgasbord