Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Some day every thing we own will have a built in life expectancy so your forced to buy a new one so rich people can make themself richer. My cell phone did that it just turned itself off. Our house water faucets did that also. The company that makes these water faucets changes the design and...
Detectors appear to be AC powered but if electricity goes off it has battery back up. I was surprised to learn with no AC and battery removed the detector continues to functions for several hours.
We live in tornado alley we have 3 months of tornadoes and 4 ft of rain every spring.
House smoke detectors are beeping again. Rain every day stopped 2 days ago. Now hot 98° and dry as desert for 2 days. I blew air through the sensor to clean out dust and pollen it still beeps 1 every 15 seconds. I unplug detector from AC and remove 9v battery the detector still beeps. There...
Very good idea. I looked above 1 door dust has settled over the door. It is very dry now 80°+ and 30 mph wind every day it is dry and dusty + pollen is 100%. I have a portable air compressor tank and air blower I can bring into the house to blow dust out of the detectors.
We woke up this morning all 5 smokers detectors appear to be beeping. Its not a continuous warning beep. Beeps are 1 single beep about 1 per minutes. Smoke detectors are wired to 120 vac with a 9v mercury battery inside. Volt meter shows all the mercury batteries are 9.3v and batteries are...
I watch all the history I can find it is very interesting. During WWII England was smarter than USA the Americans were stupid in the begging and slow to get up to speed with England. British codebreakers at Bletchley park. Spies behind enemy lines memorized the 1 tube CW code circuit and how...
This morning I notice the 1400w space heater next to my desk came ON and the ceiling LED light got dimmer. When space heater thermostat clicked off heater light light went off and the ceiling LED light got brighter. So I turned the thermostat knob on off on off on off the ceiling LED light got...
Old family information says my grandfathers older brother was a radio operator during WWI. What type transmitter was used in WWI? My guess is morse code? If there was a transmitter there had to be a receiver. When were voice transmitter and receivers also transceivers invented? All the old...
I know a loose wire can arc over heat and start a fire that is why I became interested in learning what is causing all the light bulb flicker. I checked wire nuts in light fixture and wire nuts in the attic. I bought several new bulbs to see if they all flicker also. I know a sudden power...
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