• Recent
  • Compose
  • Select the "Compose" tab to start a new discussion

Is this common for a brushless motor controller?

Started by John Doe in sci.electronics.basics2 hours ago 18 replies

https://farm1.staticflickr.com/659/21083853371_334b03da77_b.jpg It has five data/signal outputs from the controller to the motor in addition...

https://farm1.staticflickr.com/659/21083853371_334b03da77_b.jpg It has five data/signal outputs from the controller to the motor in addition to three heavy duty power wires. Not sure exactly where the power wires come from since the stuff is encased a glob of glue. One of those signal wires is purple, the other four are black. Is that common? If so, what's it called so I can find some ...


OT: Goodbye to the American Dream

Started by Jim Thompson in sci.electronics.basics3 hours ago 33 replies

Goodbye to the American Dream... Thanks to Obama... ...Jim Thompson -- | James E.Thompson ...

Goodbye to the American Dream... Thanks to Obama... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus |


Why does this breaker pop?

Started by Anonymous in sci.electronics.basics5 hours ago 2 replies

I run my shop from a rotary phase converter and this setup has been trouble free for years. Then a couple years ago I bought a machine that runs...

I run my shop from a rotary phase converter and this setup has been trouble free for years. Then a couple years ago I bought a machine that runs on 480 volts that came with a transformer to boost 240 volts to 480 volts. Most of the time when I turn on the breaker that energizes the transformer nothing happens. But once in a while, maybe 2% of the time, the breaker pops when I turn it on. The ...


Rudimentary PC USB oscilloscope?

Started by John Doe in sci.electronics.basics13 hours ago 20 replies

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...

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. ...


OT: Win7 Make Desktop Classic ???

Started by Jim Thompson in sci.electronics.basics1 day ago 72 replies

OK... The important part... how do I make Win7 the desktop look like it did in WinXP ?:-} ...Jim...

OK... The important part... how do I make Win7 the desktop look like it did in WinXP ?:-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: ...


Time to Upgrade ?:-}

Started by Jim Thompson in sci.electronics.basics7 days ago 79 replies

I think it's time I upgraded my 'Spice' machine... my present machine is as follows... no laughter please... I've successfully done at least at...

I think it's time I upgraded my 'Spice' machine... my present machine is as follows... no laughter please... I've successfully done at least at least 20 chip designs on this machine. What modern equivalent should I replace it with? ==================================== Computer Profile Summary Computer Name:Analog3 (in ANALOG) Profile Date:Wednesday, June 29, 2005 11:59:53 AM Opera...


IDFT transform

Started by Patrick Chung in sci.electronics.basics1 week ago

If we have DFT coefficients, we can reconstruct the signal by using IDFT transform. Read...

If we have DFT coefficients, we can reconstruct the signal by using IDFT transform. Read more: http://www.cirvirlab.com/index.php/electric/inverse-fourier-transform-and-inverse-dft.html and simulate http://www.cirvirlab.com/simulation/IDFT-Inverse-DFT-calculator-online.php


Parallel R-C circuit impedance

Started by Patrick Chung in sci.electronics.basics1 week ago

It is obvious that with signal frequency increase, impedance of parallel R-C circuit decreases, since impedance of the capacitor decreases with...

It is obvious that with signal frequency increase, impedance of parallel R-C circuit decreases, since impedance of the capacitor decreases with frequency, and capacitor is in parallel with the resistor. Read more: http://www.cirvirlab.com/index.php/electric/parallel-r-c-circuit-impedance.html and calculate http://www.cirvirlab.com/simulation/parallel_r_c_circuit_impedance_calculator.p...


OT: Arizona Style

Started by Jim Thompson in sci.electronics.basics2 weeks ago 10 replies

...Jim Thompson -- | James E.Thompson | mens | |...

...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Av


Overcharging NiMh batteries?

Started by Bill Bowden in sci.electronics.basics2 weeks ago 3 replies

My neighbor has a solar powered outdoor decoration light that cycles through several colors but only runs for maybe an hour at night. It has a...

My neighbor has a solar powered outdoor decoration light that cycles through several colors but only runs for maybe an hour at night. It has a single 1200 mAh 1.2 volt rechargeable battery and a couple small solar cells to charge the battery. I measured the load current at 15 milliamps and the charge current at only 1.3 milliamps so it appears the solar array is not charging the battery ...


Sign up
or Sign in