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LTspice & NumPy – Part 1: seamless integration of LTspice in python signal...
Motivation Might this article be interesting for you? Answer the following questions: Do you like signal processing with python and numpy? – Correct answer: Yes! Do you like simulating analog circuits...
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LTspice & NumPy – Part 2: Fast Convolution Filter
Motivation In the previous post we discussed the possibility to use LTspice as a “plug in” into a Python/Numpy signal processing project. It works quite well: you send a numpy data vector to LTspice,...
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AltGr Trouble with Synergy – a workaround
Hi. I am a German using a German keyboard, so I have to use the AltGr key a lot to type an @ (AltGr+Q) for example. I also like to use Linux and Windows side by side at work. This is facilitated by...
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Fix for XSane making big pdfs
Are you using Linux as your primary desktop/office system? Yes. Do you use a scanner? Yes. Are you using XSane to scan documents and save them as .pdf files? Yes. So you very likely encountered the...
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a 74xx-defined radio
Video Appetizer TLDR I built a shortwave radio receiver from scratch using only cheap and easily available components, i.e. standard transistors, op-amps and 74xx logic chips. No typical radio parts –...
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yet another perpetual pendulum
Introduction Heya. So I found people building perpetual self-exciting pendulums (pendula? pendulae?) and showing them off on youtube. Nice So far the most elegant that I know of seems to be THIS ONE...
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Using CD4000_v.lib and 74hc.lib in LTSpice
So, I was simulating a circuit in LTSpice and I wanted to use an 4000-series IC. Someone probably did that before, right? So I googled and found quite some posts mentioning the CD4000.lib or...
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a simple ringmodulator-ish FX pedal
Demo Video Introduction Earlier this year I wrote a post about how to build a simple shortwave receiver with nothing but widely available hobbyist electronics parts, i.e. 74HCxx ICs, standard...
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four buttons on one ADC pin
Motivation Sometimes you just barely get away with the number of available microcontroller GPIO pins to implement the desired functionality — And then you discover that you have no more pins left to...
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implementing a sigmoid function in analog circuitry
Motivation This is a very short one – but I felt like sharing this with the world. I was playing around with the humble long-tailed pair transistor amplifier in LTSpice. I noticed something...
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