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oscilloscope hookup? ?

Started by Ivan Vegvary in sci.electronics.basics2 hours ago 5 replies

Trying to find hookup instructions for using an older oscilloscope (heathkit) to do auto ignition analysis. (1948 Pontiac, 8cyl). Searched the...

Trying to find hookup instructions for using an older oscilloscope (heathkit) to do auto ignition analysis. (1948 Pontiac, 8cyl). Searched the web to no avail. All advice appreciated. Ivan Vegvary


Looking for mailorder company to order small amount of parts

Started by Anonymous in sci.electronics.basics10 hours ago 10 replies

Back when I was young, I lived in a big city where there were stores that sold electronic parts. Whether I needed a 50 cent capacitor or a $2...

Back when I was young, I lived in a big city where there were stores that sold electronic parts. Whether I needed a 50 cent capacitor or a $2 box of resistirs, I just went and bought them. With the exception of the "overpriced" Radio Shack stores (which have become very lacking in many parts), there are no stores to buy parts anymore. From what I have heard, even the big cities lack the...


Where to buy these electronic components for my project?

Started by Skelton John in sci.electronics.basics1 day ago 16 replies

Hi, I am new here. I am a designer at an electronic company. Now I want to design some gadget for hobby. Operation Dancing Light, circuit...

Hi, I am new here. I am a designer at an electronic company. Now I want to design some gadget for hobby. Operation Dancing Light, circuit diagram: http://4.bp.blogspot.com/-xk6tMYM9zBk/VOq7IiC_T-I/AAAAAAAAARI/4mazrjp0RmQ/s1600/Christmas1.png Parts List All the base presets are = 10K, All the collector resistors are 470 Ohms, All the diodes are = 1N4148, All NPN transistors are = BC547, The...


The saddest inductor ever?

Started by Anonymous in sci.electronics.basics2 days ago 13 replies

http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401492366 /pq8ch6utdabn6r2ybozq.png Cheers, Michael

http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401492366 /pq8ch6utdabn6r2ybozq.png Cheers, Michael


Will this timer work?

Started by Anonymous in sci.electronics.basics5 days ago 17 replies

Greetings All, I have a wire feed welder that I would like to add a stich timer to. The way it works is when the trigger on the welding gun...

Greetings All, I have a wire feed welder that I would like to add a stich timer to. The way it works is when the trigger on the welding gun pressed the welder turns on for a short time, then turns off for a short time, and so on until the trigger is released. So I thought I would use a 556 timer because I want to be able to adjust each interval independently. The intervals are pretty short, ...


Looking for folks who know about Speaker Identification

Started by Ramon F Herrera in sci.electronics.basics1 week ago 12 replies

*Important Note:* If you rather not be involved in activism, anything remotely political etc. PLEASE go to the next post. Shalom. Vaya con...

*Important Note:* If you rather not be involved in activism, anything remotely political etc. PLEASE go to the next post. Shalom. Vaya con Dios. ================================================================== We started a project where The Community (Usenet, Social Media, We The People, whatever that means) will participate by looking for audio/video clips of Mr. Bill O'Reilly,...


"Backpan" or "backplane"?

Started by DaveC in sci.electronics.basics1 week ago 3 replies

A tech writer is asking me "backplane" or "backpan"? The use is in describing PLCs and the PCB the function cards plug into. His technical...

A tech writer is asking me "backplane" or "backpan"? The use is in describing PLCs and the PCB the function cards plug into. His technical source--an engineer of the PLC manufacturer--insists the term is "backpan". I've only seen "backplane" but a net search does turn up uses of "backpan" specifically with reference to PLCs. What say y'all? Thanks.


Is it possible to determine whether a phone call is local or long distance by analyzing the audio?

Started by Ramon F Herrera in sci.electronics.basics1 week ago 60 replies

I am sure the answer is "it depends", so the better question is: To what extent is this possible? The calls in question were made in the...

I am sure the answer is "it depends", so the better question is: To what extent is this possible? The calls in question were made in the 70s, so we are in luck there. One of them can be heard here: JFK Facts: http://jfkfacts.org/assassination/dismantling-oreilly-the-last-chapter/ CNN Channel in YouTube https://www.youtube.com/watch?v=meiGNwH3H30 TIA -Ramon


OT: Hardwood vs Softwood

Started by Jim Thompson in sci.electronics.basics2 weeks ago 31 replies

I'm guessing studs in the walls of a house are likely to be "softwood"? ...Jim Thompson -- |...

I'm guessing studs in the walls of a house are likely to be "softwood"? ...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 | ...


[OT] RadioShack declares bankruptcy

Started by Mr. Man-wai Chang in sci.electronics.basics2 weeks ago 23 replies

Nearly a century after it opened its first store and sent out its first catalog, RadioShack (RSHC) declared bankruptcy on Thursday. It has...

Nearly a century after it opened its first store and sent out its first catalog, RadioShack (RSHC) declared bankruptcy on Thursday. It has struck a deal to sell up to 2,400 of its approximately 4,000 stores and wireless company Sprint (S) will create a "store within a store" in up to 1,750 of those. RadioShack said that its remaining stores are expected to close. The company's franc...


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