Recent content by NavinRJohnson

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    220VAC from broken neutral feed

    My brother had something (squirrel?) break the neutral wire from the pole to the house a while back. He said all the lights dimmed, some of the appliances started to hum loud and it blew a couple breakers. After resetting the breakers and poking around a bit he eventually took a reading, found...
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    T-Cork hopper/sorter design help

    Getting a part to move down hill is problematic enough for vibratory feeders. You might want to rethink your design if the corks need to move on an upward slope. Are there any cork feeders on the market you can look at to get an idea of what others do? I'm sure there are a few out there as...
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    Using a CNC Machine With a CAD File

    "First, switching between millimeters and inches doesn't yeild different coordinate points" If it's going to a CNC you shouldn't have no worry if it's in metric or standard. As long as your file is in a format your shop can read, they'll figure out whatever system they want to work in . "is...
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    What type of motor is best for powering a homemade helicopter?

    That is a pretty vague question but, you'll likely want to go with a brushless DC motor and controller for the best weight and efficiency. The harder part may be trying to figure out how much power and RPM your motors will need to spin the prop/prop's you use. Have you picked a prop? Have an...
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    What's the deal with the power section in my Adcom amp?

    Thanks Jony! I really appreciate the links and input. Q1: I vaguely remember saturation voltage and I'll need to read up to understand this better. Thanks for pointing me in the right direction. Q2: Not sure I understand how connecting the positive rails would help filtering in this...
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    What's the deal with the power section in my Adcom amp?

    It's been over 20 years since I received an electronics degree I never utilized. Hopefully you guys can help jog my memory a bit as I really want to start getting back up to speed. I've now taken on a more aggressive project, other than soldering pre-made boards, to help lubricate my old...
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    Thermistor Selection for TP4056: NTC Resistance Guide

    I personally wouldn't mess with a DIY or e-bay board for a lithium battery charger, ESPECIALLY if I'd be using at at a friends house. I know the lithium iron you're using are safer but, I've seen and heard about too many Li/Po fires that might make me a bit paranoid. 2 personal friends have...
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