Socket Adapter ??

Started by Jim Thompson in sci.electronics.basics2 months ago 19 replies

Is there an adapter available to convert from this POS CCFL: to a conventional base, or perhaps min-candelabra? ...

Is there an adapter available to convert from this POS CCFL: to a conventional base, or perhaps min-candelabra? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal


What to put in a HIGH SCHOOL intro electronics course?

Started by Ecnerwal in sci.electronics.basics2 months ago 25 replies

I'm contemplating offering a basic, assume nothing electronics course during the "winter-session" at our school. 17 meetings over 5 weeks...

I'm contemplating offering a basic, assume nothing electronics course during the "winter-session" at our school. 17 meetings over 5 weeks totaling about 40 hours. I want to offer basic concepts and hands-on, use a soldering iron, make stuff. Without treating it as magic, I'm also facing the fact that there's no assuming that the students will have had any advanced mathematics, so I'm...


pin diode

Started by Anonymous in sci.electronics.basics2 months ago 8 replies

Hi, What is the difference between Light Detector Resistor and a pin diode? And which one is better to use for solar tracking purposes and...

Hi, What is the difference between Light Detector Resistor and a pin diode? And which one is better to use for solar tracking purposes and why? For example LDR: http://www.digikey.com/product-detail/en/PDV-P8104/PDV-P8104-ND/480611 PIN DIODE: http://media.digikey.com/pdf/Data%20Sheets/Everlight%20PDFs/PD204-6C.pdf mel


0.5 rpm motor

Started by dave...@yahoo.co.uk in sci.electronics.basics2 months ago 10 replies

hi, i am in the uk, and need a 0.5 rpm ,low voltage (3v to 12v)motor no real torque needed its just to rotatae a disc slowly.....anyone know...

hi, i am in the uk, and need a 0.5 rpm ,low voltage (3v to 12v)motor no real torque needed its just to rotatae a disc slowly.....anyone know what might do ? dave


Wind Sensor

Started by Anonymous in sci.electronics.basics2 months ago 31 replies

I am trying to test the following wind sensor. I hooked up the sensor to the micro....

I am trying to test the following wind sensor. I hooked up the sensor to the micro. http://www.inspeed.com/anemometers/vortex_wind_sensor.asp Since, I have no wind in the lab. SO, I thought that might test it with the following DC fan http://www.digikey.com/product-detail/en/SG40281B1-000U-S99/259-1635-ND/2356497 The problem is that the DC fan produces 25.6CFM and the wind sensor g...


OT: Math Processing Question

Started by Jim Thompson in sci.electronics.basics2 months ago 21 replies

Does there exist a math program that can take as...

Does there exist a math program that can take as input: {12.5m*TANH((V(N_1,0)-(((10mA+15mA)/2)*10*ATANH(((10mA-15mA)/2)/((10mA+15mA)/2))))/10/((10mA+15m A)/2))+((10mA-15mA)/2)} and reduce it, combining terms, eliminating parentheses, etc, where possible, but leaving variables, such as V(N_1,0) ?? I'm looking for ways to simplify (and obfuscate :-) my Spice models.


Refected Power

Started by Cursitor Doom in sci.electronics.basics2 months ago 40 replies

Not really a "basic" question, but here goes: I'm just reading up on the subject of power factor in electrical supply lines and how as the PF...

Not really a "basic" question, but here goes: I'm just reading up on the subject of power factor in electrical supply lines and how as the PF heads down towards zero (as the phase difference between i and v gets more pronounced) more and more power is returned to the generator and how this can be fixed by adding capacitance or inductance in parallel with the load. This struck me as i...


Advice sought on why 6.8A USB charger melted USB cable today

Started by Danny D. in sci.electronics.basics2 months ago 3 replies

I was told to ask this question here... I would just like some advice since I melted a USB cable today and I realized I don't have the proper...

I was told to ask this question here... I would just like some advice since I melted a USB cable today and I realized I don't have the proper troubleshooting skills. I bought over a half-dozen "Hype Volt" 6.8Amp USB chargers for stuffing the Christmas stockings: https://i.imgur.com/Zavgm4B.jpg I kept one for myself, but, when I used it last night on an iPad and on an Android ph...


Welder Power

Started by OldGuy in sci.electronics.basics2 months ago 11 replies

Welder is rated 240VAC 60Hz 20A single phase. How to connect to house 220VAC 60Hz that is two phase 120VAC? House is 20A. 220VAC coming from...

Welder is rated 240VAC 60Hz 20A single phase. How to connect to house 220VAC 60Hz that is two phase 120VAC? House is 20A. 220VAC coming from unused dryer connector. --- news://freenews.netfront.net/ - complaints: news@netfront.net ---


Accelerometer

Started by Anonymous in sci.electronics.basics2 months ago 3 replies

Hi, I am controlling a single axis DC motor to follow the elevation of the Sun using two light sensors. The motor moves 180 degrees in a day....

Hi, I am controlling a single axis DC motor to follow the elevation of the Sun using two light sensors. The motor moves 180 degrees in a day. The control circuitry of the motor ( solar tracker) will be mounted on the moving solar panel mechanical assembly. I want to know the changing tilt / position. I choose the following accelerometer to calculate the tilt from dimension engineerin...


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