EVs Will Soon Be Vastly Cheaper To Own Than Carbon Fuel Vehicles

Started by Bret Cahill in sci.electronics.basics3 months ago 34 replies

Daimler and others already pointed out that the battery upon which Tesla's e-Semi is based does not exist. Tesla isn't just hoping a better...

Daimler and others already pointed out that the battery upon which Tesla's e-Semi is based does not exist. Tesla isn't just hoping a better battery will appear, however. They have good information on it and it isn't all that insider: http://www.businessinsider.com/new-discovery-could-be-death-blow-to-traditional-lithium-ion-batt eries-2017-12 https://www.theguardian.com/environment/2017/dec


component identification please

Started by Anonymous in sci.electronics.basics4 months ago 11 replies

I have searched google but cant identify these two components. I think they are Diodes. they look like Diodes, Black with two conductors at...

I have searched google but cant identify these two components. I think they are Diodes. they look like Diodes, Black with two conductors at either end. 1 Says D1, only this. It has a two symbols on it that are printed at one end that are repeated around the circumference of the component that is mayb 1/8 of and inch thick. It is two solid triangles repeated around the end. E.G. /\ \/ /\ ...


Terminology

Started by Anonymous in sci.electronics.basics4 months ago 4 replies

You may have seen me rail against how the schools teach that inversion is the same thing as 180 degrees out. Out of phase, by definition or...

You may have seen me rail against how the schools teach that inversion is the same thing as 180 degrees out. Out of phase, by definition or etymology or whatever the fuck at least strongly implies that THIS signal is THAT signal but has gone though something that has delayed it by ½ its period. Now, these two waveforms, say applied to a CRO (and ALWAYS own a CRO as long a


DAB radio kits?

Started by Peter Percival in sci.electronics.basics4 months ago 2 replies

There are plenty of AM and FM radio kits (= bag of parts and solder it yourself), but are there any DAB radio kits? -- "He who will not...

There are plenty of AM and FM radio kits (= bag of parts and solder it yourself), but are there any DAB radio kits? -- "He who will not reason is a bigot; he who cannot is a fool; he who dares not is a slave." - Sir William Drummond


Cheap new device to pull capacitors from?

Started by John Doe in sci.electronics.basics4 months ago 15 replies

What's the best inexpensive device at the local megastore to pull capacitors from? What inexpensive device has the most capacitors? If not...

What's the best inexpensive device at the local megastore to pull capacitors from? What inexpensive device has the most capacitors? If not the local megastore, then eBay or wherever. Looking for a (preferably new) cheap electronics device for the sole purpose of removing its capacitors. My interest is noise filtering, decoupling, bypass, that sort of thing. Thanks.


talking multimeter

Started by kristoff in sci.electronics.basics4 months ago 8 replies

Hi all, A member of our radioclub is starting to have problems with his eyesight, so he is looking for a multimeter that can...

Hi all, A member of our radioclub is starting to have problems with his eyesight, so he is looking for a multimeter that can talk. I've found one on the internet, but that product is only sold in the US. Anybody any idea for a not to expensive talking multimeter that can be purchased here in Europe? thx! Kristoff


How to tell speaker + from -?

Started by Anonymous in sci.electronics.basics4 months ago 12 replies

In my shop I have a a Pioneer SX-434 radio/amp for my listening pleasure. The speakers are mounted high up, screwed to the wall, and are not...

In my shop I have a a Pioneer SX-434 radio/amp for my listening pleasure. The speakers are mounted high up, screwed to the wall, and are not easy to get at. I had to disconnect the speaker wires temporarily from the stereo and stupidly didn't mark the wires for positive and negative. Is there a way to tell which wires are which that doesn't involve ladders and me unscrewing the speakers from...


Cell phone fast charging circuits

Started by Anonymous in sci.electronics.basics5 months ago 6 replies

Hello, My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the...

Hello, My Motorola phone supports "Turbo" charging, apparently charging my phone at 9-12V after establishing a secret handshake with the charger. https://www.motorola.com/us/products/turbopower Is there a chip that performs this authentication? I'd like to build a car charger for my phone without blowing it up, but I haven't seen any sample schematics. All I've seen is a reference t...


Oscillators without transistors

Started by Anonymous in sci.electronics.basics5 months ago 24 replies

Hello, What are some examples of oscillators which don't require transistors or vacuum tubes? So far I found relay oscillators and the...

Hello, What are some examples of oscillators which don't require transistors or vacuum tubes? So far I found relay oscillators and the Pearson-Anson oscillator. Does the Pearson-Anson oscillator require a high-voltage neon lamp, or would it work on LEDs as well? https://en.wikipedia.org/wiki/Pearson%E2%80%93Anson_effect Relay oscillators look neat too but I don't imagine they would la...


Speaker efficiency?

Started by Anonymous in sci.electronics.basics5 months ago 12 replies

Since I will be playing a low wattage tube amp through speakers it seems that high efficiency speakers are in order. How can I tell...

Since I will be playing a low wattage tube amp through speakers it seems that high efficiency speakers are in order. How can I tell the efficiency of a speaker from looking at the specs? Thanks, Eric


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