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11
Electric Boat Conversions / Re: My boat conversion from diesel to el.
« Last post by BjornO on May 30, 2026, 11:56:54 AM »
Now I have tested it and it works. When switched on it beeps, as it is in neutral and the brake signal is active. Rotating clockwise, speed is inreased forward, and counter clockwise reverse.
However, sometimes the beeping does not stop and the motor does not run, when I turn the throttle. Maybe the voltage on the throttle input is outside the limits. I will add the TP3 potentiometer to be able to fine tune the neutral position, but connect it to the N connector instead of the output.
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Magic Pie & Smart Pie Discussions / Forks for 1000 watt Magic Pie 5? ..
« Last post by diverdon on May 29, 2026, 03:18:33 PM »
   Thinking about upgrading the forks on my Electra Townie 7D ... The motor has been on there for years .. 2 torque arms .. the nuts have only backed off 3 times in all the years .. I'm pretty easy on it .. But .. That lower fork leg sure looks thin .. A fork called the Surly Troll looks like a good fit ... Any suggestions ?
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Electric Boat Conversions / Re: My boat conversion from diesel to el.
« Last post by BjornO on May 26, 2026, 10:14:42 AM »
I will use this. The brake signal is to make sure the motor does not move when in neutral. I have prepared it so that I can use it with or without separate reverse switch.
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Electric Boat Conversions / Re: My boat conversion from diesel to el.
« Last post by Bikemad on May 25, 2026, 08:36:23 PM »
As the working throttle voltage range is only 2V in total (1.2 to 3.2V) I don't think diodes will give you many speed options.
I suggest you use resistors as shown below:



According to my calculations, this should give the following signal voltages and corresponding throttle percentages:

Switch Position    Signal Voltage     Throttle Percent
     Neutral                2.20V                        0%
         F1                   2.42V              20% Forward
         F2                   2.62V              41% Forward
         F3                   2.83V              61% Forward
         F4                   3.03V              82% Forward
         F5                   3.24V            100% Forward
         R1                   1.85V              36% Reverse
         R2                   1.49V              73% Reverse
         R3                   1.12V            100% Reverse

The 200k trimpot (TP3) should be preset to give a resistance of approximately 103,000 Ohms between pins 1 & 2, and then readjusted when finally installed to read 2.20V between pins 1 & 2 with the rotary switch disconnected or held between 2 poles with contact open.
The 5k trimpots will need to be set as follows:
Preset TP1 to 3,150 Ohms between pins 1 & 2 (Pin 3 is not used)
Preset TP2 to 2,800 Ohms between pins 1 & 2 (Pin 3 is not used)
If necessary, readjust TP1 with the switch in the Neutral position until the Signal Voltage reads 2.20V relative to the Ground (0V) Wire.

I'm not sure how much the 200k trimpot will affect the Throttle Signal Voltage when the rotary switch is operated, hopefully it won't make much difference and the throttle will work just as expected.
Check that you have a signal voltage of just over 3.2V with the switch in the F5 position, and just below 1.2V with the switch in the R3 position.
You may have to readjust TP1 and TP2 if the Signal Voltage is too low in the F5 position or too high in the R3 position whilst also ensuring that the Signal Voltage in Neutral is still ~2.2V.

Hopefully you'll be able to make it all work as hoped.

Alan
 
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Magic Pie & Smart Pie Discussions / Re: Throttle only works 1 time.
« Last post by Bikemad on May 23, 2026, 10:00:49 PM »
Hi Luigi

I'm not sure what is causing your problem but it doesn't appear to be a problem with your controller settings or your batteries.

I suggest that you start by temporarily disconnecting both of the brake switch cables by unplugging the connectors and see if the throttle problem still exists.
Check out this thread for a similar problem that was caused by a wire shorting out inside one of the brake switches.

If disconnecting the brake connectors cures your problem then plug them back in one at a time to determine which one is faulty.

If the problem still persists with the brake switches unplugged, it could be an internal short circuit within the main wiring harness, a faulty thumb throttle, or possibly the controller itself.

Try unplugging the brake cables first and let us know what happens.

Alan
 
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Magic Pie & Smart Pie Discussions / Throttle only works 1 time.
« Last post by Luigi_stef on May 21, 2026, 05:08:34 PM »
Hello,
I have a new golden motor rear with 48V (50V) battery.

There is a problem I don’t understand.
When I start with the thumb throttle everything is going well but when I brake or let loose the throttle and restart, the throttle does not respond anymore.
I then have to turn off the battery wait 3seconds en turn it back on and then the throttle works again until I brake or stop pushing the thumb throttle.
Then same story.
When I’m driving, I can turn on the cruise control button and keep going. Went over 2 km but as soon as I brake the throttle is not responding anymore.

Everything is working fine exept for this.
I turned up and down the Ampsettings but the problem remains.
My log list stay empty.

Can someone help me for a solutions or step guide I can follow to check.
I have 2 battery but same problem with both.
Thank you very much!

Kind regards
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Electric Boat Conversions / Re: My boat conversion from diesel to el.
« Last post by BjornO on May 21, 2026, 11:00:12 AM »
Now I am working with version 3 of my throttle. The first version failed as the switch is break before make. I will use a parallel circuit with two resistors, 120k to the 5V supply and 100k to GND, giving me 2,2V between the steps. I will also try diodes instead of resistors between the steps, giving me 0,7V space.
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Electric Boat Conversions / EZKontrol integrated via canbus into Victron Cerbo OS (Boat page)
« Last post by HJK1972 on May 04, 2026, 01:53:01 PM »
Hi there, I have integrated the information from an EZKontrol controller via canbus into a Victron Cerbo OS screen.
If you want to know how I did it? please follow us on Facebook Group: https://www.facebook.com/groups/1683643219317303/

I have also made video about this on youtube: https://youtube.com/shorts/5gaQG2N7lww?si=-NSvNOHjFdvsC8bO
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Electric Boat Conversions / New Member
« Last post by HJK1972 on April 27, 2026, 10:27:25 AM »
Hi there, my name is Harjo Kompagnie and I wanted to just introduce myself. I have converted my boat with a goldenmotor 15kw motor and EZKontrol.
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Electric Boat Conversions / Re: Which potentiometer works for x20 outboard motor
« Last post by Major Clanger on March 28, 2026, 05:16:51 PM »
You are not alone.  I bought a 3kw motor kit from Miromax and received no support whatsoever when the Controller simply stopped working, all I wanted was a bit of advice.

I bought a new controller at great expense from a company in the country I live.  The company has a similar profile to Miromax re working with Universities etc.  Same problem when there was an issue, no support.

The whole area of electrification of vehicles seems to be a "Wild West" market for fly by night companies looking to make a killing.
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