o'rly, amberwolf.. i like it, i like it. I guess i could just hook up the negative voltage of the hall harness + one of the sensor leads straight into the speedo, huh?
So the number of poles is half the number of magnets because they are aligned alternating from north to south, right?
Finding out motor RPM?
26 posts
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Re: Finding out motor RPM?
by neptronix » Mon May 14, 2012 3:41 pm
ES facebook group: http://facebook.com/#!/home.php?sk=group_125035107565566&ap=1
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
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neptronix - 100 GW
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Re: Finding out motor RPM?
by amberwolf » Mon May 14, 2012 3:47 pm
neptronix wrote: I guess i could just hook up the negative voltage of the hall harness + one of the sensor leads straight into the speedo, huh?
Yes, plus 5V on the hall harness to the CA's 5V. You might also need a pullup resistor from hall signal to 5V, not sure if that is already inside the CA; should say in the manual. Pretty sure it already has this though, as I think the reed switch type just shorts that to ground when it activates, to generate the pulses.
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Re: Finding out motor RPM?
by zappy » Tue May 15, 2012 6:23 pm
I use a laser tacho from ebay, $15 delivered. You can use it on everything just apply a little reflective sticker. Very easy and cheap.
Zappy
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Re: Finding out motor RPM?
by neptronix » Tue May 15, 2012 6:27 pm
AHA!!!!!
http://www.ebay.com/itm/LCD-Digital-Laser-Photo-Tachometer-Practical-Non-Contact-Automatic-RPM-Tach-New-/260920256155?pt=LH_DefaultDomain_0&hash=item3cc00f269b#ht_5449wt_954
Like one of these, Zappy?
http://www.ebay.com/itm/LCD-Digital-Laser-Photo-Tachometer-Practical-Non-Contact-Automatic-RPM-Tach-New-/260920256155?pt=LH_DefaultDomain_0&hash=item3cc00f269b#ht_5449wt_954
Like one of these, Zappy?
ES facebook group: http://facebook.com/#!/home.php?sk=group_125035107565566&ap=1
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
-
neptronix - 100 GW
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- Joined: Tue Jun 15, 2010 5:56 pm
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Re: Finding out motor RPM?
by zappy » Tue May 15, 2012 9:02 pm
Yep, It seems to work well and very easy to use on anything that rotates.
definately a bargin
Zappy
definately a bargin
Zappy
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Re: Finding out motor RPM?
by neptronix » Tue May 15, 2012 9:31 pm
Zappy, you win this thread. I didn't know these existed, esp. at such a low price. Ordered!
ES facebook group: http://facebook.com/#!/home.php?sk=group_125035107565566&ap=1
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
-
neptronix - 100 GW
- Posts: 10431
- Joined: Tue Jun 15, 2010 5:56 pm
- Location: Salt Lake City, Utah
Re: Finding out motor RPM?
by acuteaero » Tue May 15, 2012 11:30 pm
Yes, that's good stuff, I have one and have used it for all kinds of things. For $15 it can't be beaten. I have read speeds above 9500 rpm on outrunner motors, I'm sure the limit is well above that. Note: mine killed the 9v battery in several months without use- I don't know if it's drawing constantly (it really shouldn't be...) or if it was a defective battery- either way I have been disconnecting the battery for storage now. Anyone else had this experience?
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Re: Finding out motor RPM?
by Ypedal » Wed May 16, 2012 6:54 am
I recently for the Lumen meter similar built as this, just orderd the tachometer.. thx for the link z !
ES site status page, for when "things" happen...
http://www.ypedal.com/ES/ES.htm
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Always Staying Busy !!
http://www.ypedal.com/Projects.htm
http://www.ypedal.com/ES/ES.htm
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Always Staying Busy !!
http://www.ypedal.com/Projects.htm
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Re: Finding out motor RPM?
by amberwolf » Wed May 16, 2012 2:38 pm
neptronix wrote:Zappy, you win this thread. I didn't know these existed, esp. at such a low price. Ordered!
FWIW, I did mention them in a previous post in the thread.
House Fire Updates Thread
Got a question that isn't personal or private? Post it in the forums, don't PM it.
Wiki your techy info so it doesn't get old, lost and icky:
http://endless-sphere.com/w
Full-Suspension Semi Recumbent Cargo Bike - NuVinci MidDrive
Semi-Recumbent Recycled-Parts Cargo eBike: "CrazyBike2"
DayGlo Avenger, MkII
Got a question that isn't personal or private? Post it in the forums, don't PM it.
Wiki your techy info so it doesn't get old, lost and icky:
http://endless-sphere.com/w
Full-Suspension Semi Recumbent Cargo Bike - NuVinci MidDrive
Semi-Recumbent Recycled-Parts Cargo eBike: "CrazyBike2"
DayGlo Avenger, MkII
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amberwolf - 100 GW
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Re: Finding out motor RPM?
by neptronix » Wed May 16, 2012 2:49 pm
amberwolf wrote:neptronix wrote:Zappy, you win this thread. I didn't know these existed, esp. at such a low price. Ordered!
FWIW, I did mention them in a previous post in the thread.
True. You both helped. I guess you are going to have to split the prize money.
ES facebook group: http://facebook.com/#!/home.php?sk=group_125035107565566&ap=1
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
-
neptronix - 100 GW
- Posts: 10431
- Joined: Tue Jun 15, 2010 5:56 pm
- Location: Salt Lake City, Utah
Re: Finding out motor RPM?
by neptronix » Fri May 18, 2012 10:26 pm
Woot, i got it in the mail today. Cool little unit, thanks a lot guys. Now i can test the 2000w MAC and motenergy 4201 motors.
ES facebook group: http://facebook.com/#!/home.php?sk=group_125035107565566&ap=1
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
The all-arounder: 8T MAC motor on a Trek 4500.
The girlfriend bike: 350W front MAC on a 700c Trek.
The wheelie machine: 20" Rear Magic Pie II on a Trek 4300 MTB
The Bus: ??? on a 'da bomb' cargo bike frame
Pro-tips for noobs: Avoid BMS Battery like the plague | Charge RC Lipos to 4.15v, stop discharging at 3.5-3.6v | Use torque plates/arms! | Rear mounted hubs are always best
-
neptronix - 100 GW
- Posts: 10431
- Joined: Tue Jun 15, 2010 5:56 pm
- Location: Salt Lake City, Utah
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