Battery Voltage Fluctuates
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Battery Voltage Fluctuates
Testing MS-II V3 with VR circuit. Battery voltage fluctuates on megatune when I raise RPM on the stim.
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Bernard Fife
- Master Squirter
- Posts: 475
- Joined: Thu Oct 29, 2009 12:54 pm
Re: Battery Voltage Fluctuates
scnicholl,
The tach circuit on the stim draws a fair bit of current. If you are using a battery or an unregulated supply the voltage does tend to vary with rpm. So check the actual voltage on the the stim with a DMM while changing the rpm - if the voltage varies the same as in the tuning software then that is the case, and you can either:
- get a better power supply,
- get a larger battery,
- ignore it as long as everything else works (but check it again on a running vehicle once installed).
Lance.
The tach circuit on the stim draws a fair bit of current. If you are using a battery or an unregulated supply the voltage does tend to vary with rpm. So check the actual voltage on the the stim with a DMM while changing the rpm - if the voltage varies the same as in the tuning software then that is the case, and you can either:
- get a better power supply,
- get a larger battery,
- ignore it as long as everything else works (but check it again on a running vehicle once installed).
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
Re: Battery Voltage Fluctuates
Input voltage at stim stable.
Using a 500 mA power supply.
Using a 500 mA power supply.
Re: Battery Voltage Fluctuates
OK now
Had D17 backwards
Had D17 backwards