22 March 2022

Again problems with LiquidCrystal_I2C Arduino library

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I am having issues again with third party Arduino code that uses the LiquidCrystal_I2C library. The code was written in 2015-2017 and since ...
05 March 2022

February 2022 news

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I haven't been inactive in February 2022, I've just not updated the blog. I have been playing extensively [time permitting] with WE ...
22 January 2022

Two triode valve-LED multivibrator

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  Just a couple of pictures to show the two valve astable multivibrator built as a freeform electronic "art piece" that blinks two...
17 January 2022

Abraham-Bloch valve-LED multivibrator

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Mr. Abraham and Mr. Bloch invented the astable multivibrator during World War I. It used two triodes to produce a square wave, actually two...
16 January 2022

Notes from InnoSent Application Notes on 24 GHz RADAR

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In the download area of the innosent.de website there are four application notes. They contain 24 GHz wisdom, but you need to read through t...
10 January 2022

Giants' Star by James P. Hogan

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While I loved watching science fiction series/movies like Star Trek, in my teenage years I was not a keen reader (nor my parents) and I read...
27 December 2021

Signal source for 24 GHz

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UV-82 400 to 520 MHz While waiting to go outside with the 24 GHz experimental setup I tried to measure the module frequency. The simplest wa...
19 December 2021

Observations on CDM-324 (IPM-165)

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After adding the sponge under the lid of two CDM-324 radar modules (probably clones on InnoSent IPM-165) I repeated the transmission-recept...