Supposed to have 10 to 14 km range. But probably at very low data rates. https://www.facebook.com/reel/936216961243959?mibextid=9drbnH&s=yWDuG2&fs=e
2024-03-26 HVDC Module Teardown, Operation And Explanation
A 41 min. YouTube video shows operation, tears down, and explains the components. It seems that they are made with cheap chinesium components that are too low voltage ratings so they will fail prematurely if the HVDC is left on a long time or if the spark gap is too wide. Schematic from video is
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2024-03-22 USB Power Delivery Trigger Adapter
Some important information for those who wish to power their projects with a USB C “power delivery” adapter. You may need one of these. This is a YouTube short video.
2024-03-22 The 555 Chip Under Microscope
The NE555 and some interesting information about it. A YouTube short by @Evilmonkeyzdesignz.
2024-02-04 Add Bluetooth To A Receiver
1 min. YouTube short
2023-12-07 Halfsterisk Symbol
I had to use white on black background; it should be black on a white background, like paper.
2022-04-14 Watson’s Buzz Beeper
Watson’s Buzz Beeper I built this Buzz Beeper to find out if an audible tone could be used for sending simple commands, like turn on. Recently I built a microphone preamp with a bandpass filter that can detect my whistle. But it can be triggered by loud noise. So how about I generate a tone
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2020-05-28 Solid State Shortwave RF Preselector
Comment left 2020 May 29 on YouTube video in the title. This video covers MOSFET, dual gate MOSFET, JFET and BJT tuned preamps (preselectors) for his shortwave crystal radio. “The talk about using 18 volts for the cascode got me thinking about tube designs. When the plates need 100+V, and when the heater to cathode
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2018-06-28 Bootstrapped For High Z Input
From FB group Building Transistor Radios For those who don’t want to or can’t use a JFET for high input impedance, you can use a regular transistor or two and bootstrapping to get a 10 Megohm high input impedance amplifier. This is from “Common Collector Amplifiers”, Electronics Now, Oct. 1993, found at americanradiohistory.com. For RFs,
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