The Tardigrades

Started by Banders in sci.electronics.basics5 months ago 1 reply

We can't just leave them there to die.

We can't just leave them there to die.


Rebuild computer speakers

Started by AK in sci.electronics.basics5 months ago 2 replies

I bought some Inland Pro Sound 2000 speakers from a thrift store. It is an amplified system putting out about 7 watts. They sound pretty...

I bought some Inland Pro Sound 2000 speakers from a thrift store. It is an amplified system putting out about 7 watts. They sound pretty poor. I remember making my own 8 ohm speakers years ago using a woofer, midrange, tweeter, and a cross-over network. Can I do that also with this system? Thanks.


Teaching Transistor Theory

Started by Cursitor Doom in sci.electronics.basics6 months ago 19 replies

I've just had a pedagogic revelation! Here it is: Transistor theory is much more effectively taught if explained as a *discovery* (which it...

I've just had a pedagogic revelation! Here it is: Transistor theory is much more effectively taught if explained as a *discovery* (which it was) than as an invention (which it never was). All these decades I've been wrestling with this conundrum and all it took to clear things up was a handful of these amazing mushrooms. Yay! :-D Okay, I was joking. But seriously, think about it. The co...


Thermionic valve projects?

Started by Peter Percival in sci.electronics.basics6 months ago 22 replies

Here https://www.rapidonline.com/valves there are a variety of thermionic valves. Where can I find projects that utilize them? I'll also...

Here https://www.rapidonline.com/valves there are a variety of thermionic valves. Where can I find projects that utilize them? I'll also need a HT power supply. Any thoughts? -- "He who will not reason is a bigot; he who cannot is a fool; he who dares not is a slave." - Sir William Drummond


Soldering paste

Started by AK in sci.electronics.basics6 months ago 10 replies

I recently received this and am learning about what applications it is good for. https://imgur.com/3pGTm0a I put a small amount on a project...

I recently received this and am learning about what applications it is good for. https://imgur.com/3pGTm0a I put a small amount on a project board and the solder seemed to adhere better. I am using up some old RS solder that has the paste already in it, though it may have dried out quite a bit. What situations would be good to use the paste in? Thanks, Andy


Replacement NiMh battery for small solar light

Started by AK in sci.electronics.basics6 months ago 1 reply

I replaced a 600 Mah NiMh battery in a small solar light with a 2300 Mah since I had no 600 Mah hr batteries in my stock. It worked great for...

I replaced a 600 Mah NiMh battery in a small solar light with a 2300 Mah since I had no 600 Mah hr batteries in my stock. It worked great for about a week, but then the light started blinking when it should be on steadily. Is it because the solar panel can not charge a battery with 4 times the capacity? Andy


Dropbox test

Started by John Larkin in sci.electronics.basics6 months ago 4 replies

https://www.dropbox.com/sh/lx4vkcno5thghc5/AAAQ0-_kBJz86FkV2-MN5Mxea?dl=0 Can non-Dropbox members open this folder and sub-folder and see...

https://www.dropbox.com/sh/lx4vkcno5thghc5/AAAQ0-_kBJz86FkV2-MN5Mxea?dl=0 Can non-Dropbox members open this folder and sub-folder and see the files? -- John Larkin Highland Technology, Inc lunatic fringe electronics


Connection from camera to TV

Started by AK in sci.electronics.basics6 months ago 9 replies

Due to a recent theft, I want to get this B/W security camera going. At one time, I had the output going to my TV. The one pic shows the...

Due to a recent theft, I want to get this B/W security camera going. At one time, I had the output going to my TV. The one pic shows the connector at the other end of the camera cabling. My TV has a video input using a RCA connector. Is there some adaptor I need? https://imgur.com/QDxOKBI https://imgur.com/1I6SPe4


Designing Plastic Containers & Waste Separation Equipment Around Each Other

Started by Bret Cahill in sci.electronics.basics6 months ago 8 replies

They keep hyping plastic recycling issues like it's politically...

They keep hyping plastic recycling issues like it's politically correct. https://www.theguardian.com/us-news/2019/jun/17/recycled-plastic-america-global-crisis If minor low cost changes are made to plastic containers beforehand it may be easier than they think to make recycling profitable. Most industrial separation processes don't have the luxury of designing what is going to


Lubricate coax connection

Started by AK in sci.electronics.basics6 months ago 7 replies

It's hard to unscrew the coaxial cable from the antenna. Is there something that can make that easier and minimize corrosion? I think there...

It's hard to unscrew the coaxial cable from the antenna. Is there something that can make that easier and minimize corrosion? I think there is corrosion occurring on the aluminum "arms" of the antenna as well. https://imgur.com/ntxK7ou


Ask a Question to the Electronics-Related community

To significantly increase your chances of receiving answers, please make sure to:

  1. Use a meaningful title
  2. Express your question clearly and well
  3. Do not use this forum to promote your product, service or business
  4. Write in clear, grammatical, correctly-spelled language
  5. Do not post content that violates a copyright