• How much gain should I expect from using a longer antenna?

    I have a handheld transceiver with a 22 cm antenna. How much more will I receive or reach when using a 55 cm one? Is there a simple mathematical formula? Something like "4 times the length will double the distance" ?
    I have a handheld transceiver with a 22 cm antenna. How much more will I receive or reach when using a 55 cm one? Is there a simple mathematical formula? Something like "4 times the length will double the distance" ?
    5 answers · 1 week ago
  • Can carbon monoxide be contained to rooms/units easily?

    I need to avoid carbon monoxide for health reasons and I'm wondering if I move into a room or apartment that uses gas heating like most places do, will I be subjected to it if I simply don't turn the heat on in my place?
    I need to avoid carbon monoxide for health reasons and I'm wondering if I move into a room or apartment that uses gas heating like most places do, will I be subjected to it if I simply don't turn the heat on in my place?
    7 answers · 2 weeks ago
  • FISH 8840 Electronic Components Test ESR in circuit??

    I bought last week FISH 8840 ESR tester, as the salesperson said it can test ESR in circuit. I attached probe leads and tested some capacitors in circuit, All results are wrong, showing ESR=45pF, 39pF, ....(actual values are 2200uF, 1500uF....) Please advise what is wrong with this device FISH8840 ESR tester?? Is... show more
    I bought last week FISH 8840 ESR tester, as the salesperson said it can test ESR in circuit. I attached probe leads and tested some capacitors in circuit, All results are wrong, showing ESR=45pF, 39pF, ....(actual values are 2200uF, 1500uF....) Please advise what is wrong with this device FISH8840 ESR tester?? Is it not for testing capacitors in circuit??
    6 answers · 2 weeks ago
  • What's going on with the outlets?

    Best answer: Turn off the main breaker and snug up the conductors. If that doesn't fix it leave the power off and tighten the conductors on likely wall sockets. Check any wire nuts you run across (power off). The M/W is a large load and a bad connection enroute will open. As long as the main breaker is OFF, you won't... show more
    Best answer: Turn off the main breaker and snug up the conductors. If that doesn't fix it leave the power off and tighten the conductors on likely wall sockets. Check any wire nuts you run across (power off). The M/W is a large load and a bad connection enroute will open. As long as the main breaker is OFF, you won't be electrocuted. Wear thick rubber souls. Never use both hands simultaneously. Use insulated tools. OR help your local electrician get richer.
    5 answers · 2 weeks ago
  • Project to prevent drowsy drivers from falling asleep?

    We're making a project that aims to prevent drivers from sleeping. And in the case that it detects signs of drowsiness, an alarm will be set off. Is it safe to use flashing lights inside the vehicle to warn the driver? What are the pros? What are the cons? Is there any way to counter it?
    We're making a project that aims to prevent drivers from sleeping. And in the case that it detects signs of drowsiness, an alarm will be set off. Is it safe to use flashing lights inside the vehicle to warn the driver? What are the pros? What are the cons? Is there any way to counter it?
    9 answers · 2 weeks ago
  • What does engineer do?

    those people who works with machine at the factory, are they engineers?
    those people who works with machine at the factory, are they engineers?
    9 answers · 2 weeks ago
  • Is it possible that engineers act socially awkward on purpose, as a way of saying "I can do what I want?"?

    Best answer: Is it possible that not all engineers are the same?
    Best answer: Is it possible that not all engineers are the same?
    6 answers · 2 weeks ago
  • What microwave oven was the very first to feature a safety interlock switch?

    Best answer: I don't think that any commercial product would have been sold to the public without an interlock.

    Once microwave ovens got out of the pure laboratory environment, engineers would have designed in safety features. We're not stupid.
    Best answer: I don't think that any commercial product would have been sold to the public without an interlock.

    Once microwave ovens got out of the pure laboratory environment, engineers would have designed in safety features. We're not stupid.
    7 answers · 2 weeks ago
  • Can someone help with making a circuit?

    I have to make a circuit that flashes 2 LEDs when I press a push button using only a breadboard, resistors, wires led, push button, transistors, and other simple things. It has to keep going until it’s disconnected. We have been using the 33 in 1 kit but idk how to do this
    I have to make a circuit that flashes 2 LEDs when I press a push button using only a breadboard, resistors, wires led, push button, transistors, and other simple things. It has to keep going until it’s disconnected. We have been using the 33 in 1 kit but idk how to do this
    6 answers · 2 weeks ago
  • 32 and need career change from nursing?

    Im looking at accounting and electrical engineering. I like both.but want to know which one would be better for a mom.
    Im looking at accounting and electrical engineering. I like both.but want to know which one would be better for a mom.
    5 answers · 2 weeks ago
  • Can a 1000W Power supply turn my entire circuit on?

    So, I have a circuit that draws 70 amps in total. This is the light system in a float. I used LED strips in almost everything and some neopixel strips. This will use a battery in the future, but this year’s float, we used a 450 PSU, and it literally blew up after 2 minutes of powering it all. Would a 1000W PSU be... show more
    So, I have a circuit that draws 70 amps in total. This is the light system in a float. I used LED strips in almost everything and some neopixel strips. This will use a battery in the future, but this year’s float, we used a 450 PSU, and it literally blew up after 2 minutes of powering it all. Would a 1000W PSU be enough to power this whole thing on? I was using a regular PC PSU.
    9 answers · 3 weeks ago
  • How much does it cost to build a 50-mile radius, spherical dome to cover the entire city of Dubai.....?

    From the dangerous scorching sunlight....
    From the dangerous scorching sunlight....
    8 answers · 2 weeks ago
  • Difficulty answering:?

    Question is: convert the overall length of the shaft to feet and inches (shaft length 351mm) and round to the nearest 1/16th of an inch. Thanks for any help.
    Question is: convert the overall length of the shaft to feet and inches (shaft length 351mm) and round to the nearest 1/16th of an inch. Thanks for any help.
    7 answers · 2 weeks ago
  • Solar light bulbs?

    Is there a type of solar powered light that isn t turned on during the day, that just charges from the sun and automatically turns on at night and stays on until it runs out of battery? Would it be possible for this to exist in a chain, like Christmas lights?
    Is there a type of solar powered light that isn t turned on during the day, that just charges from the sun and automatically turns on at night and stays on until it runs out of battery? Would it be possible for this to exist in a chain, like Christmas lights?
    5 answers · 2 weeks ago