Tuesday, September 21, 2021

Adding a Lamda Diode Oscillator and V-Cap

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  The four transistors produce a Vcap to tune the oscillator. The sim is stepping the 10k pot from 1k to 10k in 1k steps. The 100p cap (C2) ...
Friday, September 3, 2021

3 volt earbud amp

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 Back to the project. I will be going with the 3 volt supply. My earbud is rated at 1ma. This amp look good. The input is 500uv for 1 ma out...
Tuesday, August 31, 2021

RF resistance data

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 I'm putting this here so it does not get misplaced.
Monday, August 30, 2021

Consider the dualities. The opposites. What can we say about them? light - dark E field - H field particles at rest or in motion.

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 Consider EMF, current, B and motion. Can we have any of them without the other? Suspend a wire in a H field and send a current threw it, it...

LDO low voltage - pinned vs surface mount components

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I was planning a single cell radio. The previous oscillator was looking good but will need a little more thought. In the mean time I am look...
3 comments:
Wednesday, July 28, 2021

A little mind experiment about the coil - core - inductance relationship.

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Q - What is the "Q" of a coil? A - The quality of the coil. Q - OK? Plain English please. A - The reactance and the resistance div...
Thursday, July 22, 2021

Variable inductor controlled by a pot.

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 A weird idea bouncing around in my head. It goes like this: I can use a pot and diode to acts as a variable cap. Why not use a pot and coil...