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  • 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.

Recent content by Keith42

  1. Keith42

    Transistor not being turned on / closed by 555 timer

    Attached is a diagram of my circuit, with the trouble transistor labeled. I am for the moment more interested in whats wrong with mine than a whole new one. To Reloadron - Wouldn't the resistor values for your timer give it near constant on 98% duty cycle? I also do not entirely understand...
  2. Keith42

    Transistor not being turned on / closed by 555 timer

    Attached diagram for what i have. To Reloadron and his Circuit: wouldn't the timer with those resistor values be running like a 98% duty cycle, almost always high? I also do not entirely understand how that's going to make AC, i'm guessing something to do with the capacitor supplying...
  3. Keith42

    Transistor not being turned on / closed by 555 timer

    Hi, i am trying to build a power supply for a GE ne-42 neon lamp. All it really needs to operate is about 60v, however, only the negative electrode of the lamp glows, so i am trying to generate some AC power from AA batteries so that both electrodes will glow. I tried to do this using a...

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