testing please ignore

Started by default in sci.electronics.basics1 day ago 8 replies

Haven't seen any postings later than 7/18 (on a few groups)

Haven't seen any postings later than 7/18 (on a few groups)


Encoder

Started by Anonymous in sci.electronics.basics2 days ago 2 replies

Hi, My stepper motor moves 1.8 degree per Full step. 360/1.8 = 200 full steps per revolution. I will further sub divided full step into 16...

Hi, My stepper motor moves 1.8 degree per Full step. 360/1.8 = 200 full steps per revolution. I will further sub divided full step into 16 micro-steps to get 3200 steps /rev by using software. My question is how to choose encoder for this stepper motor. My goal is very simple , move the motor and read the outputs of the encoder. What should be the "cycles per revolution" and "pulses per ...


Why is the neutral tied to ground in USA single phase wiring?

Started by Anonymous in sci.electronics.basics1 week ago 21 replies

I was thinking about this last night as I fell asleep. I was thinking that if neither of the wires in a single phase system were connected to ...

I was thinking about this last night as I fell asleep. I was thinking that if neither of the wires in a single phase system were connected to ground then it would be like using an isolation xmfr. Touching either line and ground wouldn't shock me. But that's not the way we do it so there must be a good reason why not. Thanks, Eric


Isolation transformer question

Started by Fester Bestertester in sci.electronics.basics1 week ago 8 replies

I have 2 isolation transformers, 115:115 and 115:230, same make, both 1.0KVA. These will be powered via Variac. I?m in the USA so will use...

I have 2 isolation transformers, 115:115 and 115:230, same make, both 1.0KVA. These will be powered via Variac. I?m in the USA so will use mostly 115v output but occasionally need 230v. When I need 230, obviously I?ll use the 230v trans. But when I need only 115v is there any advantage in using the 115:115 transformer rather than the 115:230 with Variac at half turn? Thanks.


Fritzing ??

Started by Jim Thompson in sci.electronics.basics2 weeks ago 47 replies

Anyone using "Fritzing" ?? ...Jim Thompson -- | James E.Thompson |...

Anyone using "Fritzing" ?? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Availa...


Location of Passive RFID on Motor Vehicles

Started by Bret Cahill in sci.electronics.basics2 weeks ago 5 replies

Supposedly the active devices are often near the rear view mirror. Where are the passive RFIDs typically located when factory installed?

Supposedly the active devices are often near the rear view mirror. Where are the passive RFIDs typically located when factory installed?


Banana plugs and jacks

Started by George Herold in sci.electronics.basics2 weeks ago 19 replies

OK this is a silly question. You've got banana plugs and jacks... which is the female and which male. (I can find it both ways online.) ...

OK this is a silly question. You've got banana plugs and jacks... which is the female and which male. (I can find it both ways online.) George H.


Here's what I know about negative feedback

Started by chrisv in sci.electronics.basics2 weeks ago 11 replies

I have a BSEE. Negative feedback has many benefits, but "maintaining stability" is not one of them. Just the opposite, in fact. Agree or not?

I have a BSEE. Negative feedback has many benefits, but "maintaining stability" is not one of them. Just the opposite, in fact. Agree or not?


Project Enclosures

Started by Searcher7 in sci.electronics.basics2 weeks ago 16 replies

I am in need of "project boxes" and was hoping to get ideas from others. Specifically what I need are recommendations on material and where I...

I am in need of "project boxes" and was hoping to get ideas from others. Specifically what I need are recommendations on material and where I might find it for enclosures that are cylindrical. I will basically need to place a lot of switches in an area that would equal a 4" long by 4" diameter tube. What I found so far is cost prohibitive, so any ideas would be appreciated. Thanks. Dar...


how do I combine two 240VAC circuits in parrellel on a mter base to register KWH

Started by Henry Rentz in sci.electronics.basics3 weeks ago 2 replies

I am installing an Enphase inverter system with more than 17 panels (one circuit = 17 modules)we have 13 on one circuit and 12 on the other 25...

I am installing an Enphase inverter system with more than 17 panels (one circuit = 17 modules)we have 13 on one circuit and 12 on the other 25 total. The utility requires a production meter on the system to measure real output prior to entering the home electrical system. It becomes necessary to combine both circuits to obtain the needed information for the utility. how is this communally ac...


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