1. L

    Beginner's question about a NOT inverter

    Hello, This is my first post here. I'm trying to learn electronics on my own via different sites At the moment, I'm trying to understand how a NOT inverter works. I perfectly understood what it was used for, but something escapes me on this diagram...
  2. G

    12v DC 7A UPS from Li-ion Batteries

    Hi All, Complete beginner here so please bear with me! Trying to work out a solution for changing the main battery on my portable video switching system. The project is powered off a single 12V DC 8A V-Mount battery which powers the system perfectly. That said, I can't find a UPS with the...
  3. Pashgen

    How to find a mistake. Sound amplifier circuit board. Need help with troubleshooting

    Hi, I bought DIY amplifier board. And now I am trying to find what I did wrong. It can work for about 2 seconds and then sound dissappear. But power stays on, and LED is glowing I connected 24 volt toroid to start the board. In description it says that circuit is designed for 12 to 36 AC...
  4. E

    Trying to design an audio circuit with a carbon single button microphone so that I can output the audio into a PC

    So I recently purchased a 285W western electric transmitter as I'm trying to more or less make a microphone that can plug into a computer which uses a carbon button microphone from the early 20th century. I have little education in circuit design, though I know enough to know I probably made...
  5. M

    What is the best book to start learning about electronics?

    I'm 15 and want to start learning electronics but I don't know what the best book is for beginners. I have read suggestions on other sites and there are 2 books that keep coming up. "The Art of Electronics" and "Practical Electronics for Inventors". What would be the best out of these two? Or if...
  6. B

    How to select appropriate components?

    I've just started tinkering and I'm having trouble with a pretty basic concept: reading and selecting components. I have some push buttons that say ACDC 24V — does this mean in need 24V of AC -> DC power for the component? I have another push button that says: UI: 440V AC15 Ith: 10A DC13 —...
  7. nickhess

    Adapting an old CRT Viewfinder ( 9.3 V DC / 2.7W )

    Quarantine project: Adapting a Sony BFV-20W viewfinder Scroll down to skip the background info As a cinematographer, I've always really felt most comfortable shooting with a viewfinder. However modern electronic viewfinders all exist in the "prohibitively expensive" class of filmmaking...
  8. B

    "Control Panel" Play Station — How?

    Let me just state: I'm a totally newb (some entry-level Arduino and breadboard tutorials under my belt) and my vision is vastly outside the scope of my abilities, but I'm here to get some broad tips and feedback so that I can figure out where to begin on my path towards actualizing this project...
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