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Rudimentary PC USB oscilloscope?

Started by John Doe September 2, 2015
My main question is about PC USB-based oscilloscopes. The rest of this is 
specific to my problem(s) and may be overlooked.

I'm using cordless drills to power electric bicycles. I have one built. It 
works but is underpowered. I am building a better one using a DeWalt 
DCD995. Some nice electronics included in that drill, a stout (very tight 
turning) brushless motor with a controller. 

It has a few inputs from the speed switch and clutch. 

It has 5 data/signal outputs from the controller to the motor. One wire is 
purple, the other four wires are black.

https://farm1.staticflickr.com/659/21083853371_334b03da77_b.jpg

It also has three heavy-duty wires going to the motor. I've been told that 
the drill uses AC, so maybe that's what the extra power wire is for, I 
dunno. 

I desperately need to disable some of the motor's functions, so I need to 
know what the various wires do. Since it's probably a DeWalt specific 
motor, looking for data would be a waste of time?

The three heavy-duty wires... Do you guess they control any of the 
functions or are they simply for supplying power?

Thanks.
On Wednesday, September 2, 2015 at 5:30:18 PM UTC-5, John Doe wrote:
> My main question is about PC USB-based oscilloscopes. The rest of this is > specific to my problem(s) and may be overlooked. > > I'm using cordless drills to power electric bicycles. I have one built. It > works but is underpowered. I am building a better one using a DeWalt > DCD995. Some nice electronics included in that drill, a stout (very tight > turning) brushless motor with a controller. > > It has a few inputs from the speed switch and clutch. > > It has 5 data/signal outputs from the controller to the motor. One wire is > purple, the other four wires are black. > > https://farm1.staticflickr.com/659/21083853371_334b03da77_b.jpg > > It also has three heavy-duty wires going to the motor. I've been told that > the drill uses AC, so maybe that's what the extra power wire is for, I > dunno. > > I desperately need to disable some of the motor's functions, so I need to > know what the various wires do. Since it's probably a DeWalt specific > motor, looking for data would be a waste of time? > > The three heavy-duty wires... Do you guess they control any of the > functions or are they simply for supplying power? > > Thanks.
Not sure can be of much help but that motor and pinion is $54 from Dewalt. They have exploded view but little else. Would have to unpot the controller and go from there I guess. Unless you can come up with some numbers to search for.
Thanks to the replies.

FWIW...
My interest in this might be waning even though I already bought one DCD995 
impact driver and dissected it, besides making one electric bike already. 
Now I'm thinking an impact wrench instead. Apparently impact wrenches are 
meant for torque in the reverse direction. That should mean they can be 
efficiently placed on the left side of the bicycle bottom bracket, opposite 
the sprocket. And of course disabling the impact function. DeWalt sells 
variable speed models geared even lower than my DCD995.
On Wed, 2 Sep 2015 22:28:23 +0000 (UTC), John Doe
<always.look@message.header> Gave us:

>My main question is about PC USB-based oscilloscopes. The rest of this is >specific to my problem(s) and may be overlooked. > >I'm using cordless drills to power electric bicycles. I have one built. It >works but is underpowered. I am building a better one using a DeWalt >DCD995. Some nice electronics included in that drill, a stout (very tight >turning) brushless motor with a controller. > >It has a few inputs from the speed switch and clutch. > >It has 5 data/signal outputs from the controller to the motor. One wire is >purple, the other four wires are black. > >https://farm1.staticflickr.com/659/21083853371_334b03da77_b.jpg > >It also has three heavy-duty wires going to the motor. I've been told that >the drill uses AC, so maybe that's what the extra power wire is for, I >dunno. > >I desperately need to disable some of the motor's functions, so I need to >know what the various wires do. Since it's probably a DeWalt specific >motor, looking for data would be a waste of time? > >The three heavy-duty wires... Do you guess they control any of the >functions or are they simply for supplying power? > >Thanks.
Here.... http://www.amazon.com/Razor-250w-Electric-Motor-E200/dp/B007EMRCVM Look at the rest of the page too. There are even controllers. Think "slot cars" for a mindset.
On Thu, 03 Sep 2015 02:07:27 -0400, DecadentLinuxUserNumeroUno
<DLU1@DecadentLinuxUser.org> Gave us:

>On Wed, 2 Sep 2015 22:28:23 +0000 (UTC), John Doe ><always.look@message.header> Gave us: > >>My main question is about PC USB-based oscilloscopes. The rest of this is >>specific to my problem(s) and may be overlooked. >> >>I'm using cordless drills to power electric bicycles.
snip
> > Here.... > >http://www.amazon.com/Razor-250w-Electric-Motor-E200/dp/B007EMRCVM > > Look at the rest of the page too. There are even controllers. > > Think "slot cars" for a mindset.
http://www.amazon.com/Electric-Bicycle-Conversion-Motor-Wheel/dp/B00OZ0C7VQ
DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> wrote: 

> DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> Gave us: >> John Doe <always.look@message.header> Gave us: >> >>>My main question is about PC USB-based oscilloscopes. The rest of >>>this is specific to my problem(s) and may be overlooked. >>> >>>I'm using cordless drills to power electric bicycles. > > snip >> >> Here.... >> >>http://www.amazon.com/Razor-250w-Electric-Motor-E200/dp/B007EMRCVM >> >> Look at the rest of the page too. There are even controllers. >> >> Think "slot cars" for a mindset. > > http://www.amazon.com/Electric-Bicycle-Conversion-Motor-Wheel/dp/B00OZ0C7VQ
If you have built an electric bike, I'd like to see it. I have been doing this for a long time and I'm familiar with most methods. Hub motors are still pretty expensive. If it were cheap or easy to build a robust electric bike, the fast ones wouldn't be selling for $10,000 US. I just ordered a DeWalt DCF899 for $209 (total). It's a massive impact wrench that goes with the batteries and charger I have. It should make building this thing much less difficult than any other way. And super power. Good efficiency. Ultra durable. And other things. Time will tell. If and when completed, I'll probably post it on my YouTube page (pqxxedf). This is way off topic, at least for this thread, so I'll see you later.
On Wed, 2 Sep 2015 22:28:23 +0000 (UTC), John Doe
<always.look@message.header> wrote:

>My main question is about PC USB-based oscilloscopes. The rest of this is >specific to my problem(s) and may be overlooked. > >I'm using cordless drills to power electric bicycles. I have one built. It >works but is underpowered. I am building a better one using a DeWalt >DCD995. Some nice electronics included in that drill, a stout (very tight >turning) brushless motor with a controller. > >It has a few inputs from the speed switch and clutch. > >It has 5 data/signal outputs from the controller to the motor. One wire is >purple, the other four wires are black. > >https://farm1.staticflickr.com/659/21083853371_334b03da77_b.jpg > >It also has three heavy-duty wires going to the motor. I've been told that >the drill uses AC, so maybe that's what the extra power wire is for, I >dunno. > >I desperately need to disable some of the motor's functions, so I need to >know what the various wires do. Since it's probably a DeWalt specific >motor, looking for data would be a waste of time? > >The three heavy-duty wires... Do you guess they control any of the >functions or are they simply for supplying power? > >Thanks.
You can use any sound card, including USB sound devices, as a scope input. HOWEVER, note that all sound cards are AC coupled (even the ones that claim otherwise, it appears), though that may not be an issue for you if the motor really uses AC. Also note that sound card inputs are typically good for only 1-2 V before clipping, so you'll need an input limiter and/or voltage divider. A simple circuit to do both is at <http://www.daqarta.com/dw_0all.htm>. Best regards, Bob Masta DAQARTA v8.00 Data AcQuisition And Real-Time Analysis www.daqarta.com Scope, Spectrum, Spectrogram, Sound Level Meter Frequency Counter, Pitch Track, Pitch-to-MIDI FREE 8-channel Signal Generator, DaqMusiq generator Science with your sound card!
On Thu, 3 Sep 2015 08:20:50 +0000 (UTC), John Doe
<always.look@message.header> Gave us:

>I just ordered a DeWalt DCF899 for $209 (total). It's a massive impact >wrench that goes with the batteries and charger I have.
And would build you a ten mph bike. The hub motors you so swiftly dismissed were only a hundred dollars more, and take your bike to 30 mph, and they have front wheel versions too.
On Thu, 3 Sep 2015 08:20:50 +0000 (UTC), John Doe
<always.look@message.header> Gave us:

>. It should make >building this thing much less difficult than any other way.
The hub motor is a bolt on accessory.. It comes with the wheel, ya dope. They had the wheel, tire battery pack, and controller and some even had a disc brake with them. Sheesh.
N0Spam@daqarta.com (Bob Masta) wrote: 

> You can use any sound card, including USB sound devices, as a scope > input.
Yeah, I did that once. As I recall, it didn't work very well because (for one reason) the input impedance wasn't very high.