Deformables Hack For Melted Large Screen TV

Started by Bret Cahill in sci.electronics.basics6 hours ago

An acquaintance said her TV didn't work. I knew the problem immediately: Everything including asbestos cement warps from the heat in the valley,...

An acquaintance said her TV didn't work. I knew the problem immediately: Everything including asbestos cement warps from the heat in the valley, not just mother boards. I applied about a half dozen different bending moments to the monster with my bare hands, and, sure enough, except for some white noise on the left side, got it to work. The Fonz would be envious. A bungee cord / 2X4...


How to connect audio input to a breadboard

Started by Peabody in sci.electronics.basics3 days ago 3 replies

I need to connect the audio output of a walkie talkie to a breadboard. The WT jack is 2.5mm stereo. Does anyone know of a jack, either 2.5mm...

I need to connect the audio output of a walkie talkie to a breadboard. The WT jack is 2.5mm stereo. Does anyone know of a jack, either 2.5mm or 3.5mm, that has .1 inch spacing and plugs into a breadboard?


Power Requirements for Temporary Emergency Cell Towers

Started by Bret Cahill in sci.electronics.basics2 weeks ago 11 replies

Maybe the coverage isn't as large, maybe service is intermittent, but it should be possible to air drop low power emergency cell towers in remote...

Maybe the coverage isn't as large, maybe service is intermittent, but it should be possible to air drop low power emergency cell towers in remote locations. Hang it up in the top of a tree so it will take awhile for vandels and looters to get to it. https://en.wikipedia.org/wiki/Cell_site Bret Cahill


Most efficient way to get 1.5 volts from 3.7 volts or less?

Started by Anonymous in sci.electronics.basics3 weeks ago 27 replies

I have a digital height gauge that eats batteries. Not a cheap Chinese made one, but a fairly high quality Japanese made one. It uses one SR44...

I have a digital height gauge that eats batteries. Not a cheap Chinese made one, but a fairly high quality Japanese made one. It uses one SR44 battery. For some reason it has started using batteries much faster than it used to. I have tried several different brands of batteries from several different sources and they all seem to last about the same. Because of the bulk of the sliding portion ...


Current Sources

Started by Chris in sci.electronics.basics4 weeks ago 69 replies

Hi Finding it real tough trying to visualise a current source. I have no probs with voltage sources which seem very logical, but for some...

Hi Finding it real tough trying to visualise a current source. I have no probs with voltage sources which seem very logical, but for some reason I can't get my head around current sources. How should I try to see them? Any guidance would be much appreciated; thanks.


Microdisplay Market: Key Trends, Demand, Growth, Size, Review, Share, Analysis to 2025

Started by Anonymous in sci.electronics.basics4 weeks ago

Microdisplay market is expected to grow US$ 8942.3 million by 2025 from US$ 845.3 million in 2016. The sales of Microdisplays is largely...

Microdisplay market is expected to grow US$ 8942.3 million by 2025 from US$ 845.3 million in 2016. The sales of Microdisplays is largely influenced by numerous economic and non-economic factors. The sales pattern for Microdisplays have faced similar ups and downs as the global economy. Therefore, the global economy plays a key role in the development of Microdisplay market. Amongst


I'm available for projects

Started by Jim Thompson in sci.electronics.basics1 month ago 54 replies

I sit here bored out of my skull with nothing to do but play Solitaire until the next project start on July 5 ;-) I'm noted for custom...

I sit here bored out of my skull with nothing to do but play Solitaire until the next project start on July 5 ;-) I'm noted for custom Analog/Mixed-Signal Design and Spice Behavioral Modeling, but I also do designs using off-the-shelf components. No project is too small... I've even done one-day designs from time-to-time. Drop me an E-mail (*) (*) Do not include attachments in your ...


Shopping for LEDs - Forward Voltage, etc.

Started by Anonymous in sci.electronics.basics1 month ago 7 replies

Aloha! I'm currently in the process of ordering components for a project that was = designed by the manufacturer. The project calls for LEDs,...

Aloha! I'm currently in the process of ordering components for a project that was = designed by the manufacturer. The project calls for LEDs, although it doesn= 't tell me exactly the specs on the LEDs. Looking at the schematic diagram, the anode is powered by a 5VDC source, an= d also has a 4.7uF capacitor attached to the same trace. On my tests, the o= verall voltage reaching the anode...


Make a handheld Vacuum Cleaner an Anti-Static tool?

Started by Adrian Caspersz in sci.electronics.basics1 month ago 3 replies

I've got a cheap (£25/$30) hand held bagless 500W vaccum cleaner made out of ABS plastic that must create a lot of static electricity when in...

I've got a cheap (£25/$30) hand held bagless 500W vaccum cleaner made out of ABS plastic that must create a lot of static electricity when in operation. http://www.beldray.com/beldray-bel0427-quick-vac-lite-red.html I'd quite like to use it to clean dust out from electronic equipment. From another vacuum cleaner (industrial photo-copier maintenance thing) I have a short conductive...


Capacitor-run induction motor windings

Started by Anonymous in sci.electronics.basics1 month ago 5 replies

Hello, I'm hoping to convert old household induction motors to brushless motors basically by replacing the rotor with magnets. However I'm...

Hello, I'm hoping to convert old household induction motors to brushless motors basically by replacing the rotor with magnets. However I'm having difficulty understanding the stator winding patterns. I need to isolate the phases obviously. Any suggestions? Even if they are two phase instead of three phase, that is useful too. Thanks, Michael


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