FreeCAD 3D Models

I’ve been a bit quiet for a while but that certainly doesn’t mean I’ve been idle! Teaching myself: LibreCAD (2D open-source alternative to AutoCAD) FreeCAD (3D open-source alternative to SolidWorks) Markdown (mostly revision) KiCAD (about half-half new and revision) Assembly for PIC microcontrollers SPICE (Simulation Program with Integrated Circuit Emphasis) … “FreeCAD 3D Models”

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DSO138

I Built an Oscilloscope! This is the JYE Tech DSO138 which I bought from eBay along with a third-party acrylic case. The documentation was adequately detailed; including pictures and a step by step checklist of build instructions. The SMT components in my kit came pre-soldered to the board. There was … “DSO138”

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Yamaha DX7 Repair

Yamaha DX7 IIFD with Grey Matter E! Expansion I had a long, well thought out post to go with these pictures but my browser decided backspace meant “Previous Page” instead of “Erase Letter” so now you get no long, well thought out post; just a short, passive aggressive one instead. … “Yamaha DX7 Repair”

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Schrodingers Voltage Divider

As part of a project I’m currently working on I wanted to set a specific reference voltage (AREF) for the microcontroller’s onboard analog-to-digital converter. Working out the analog reference voltage required so that with an analog to digital converter of 10bit accuracy, 1000/1024 will correspond to 2.5V. Calculating the magnitude … “Schrodingers Voltage Divider”

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SPICE

This afternoon I wet my feet in the field of SPICE (Simulation Program with Integrated Circuit Emphasis.) I started with a basic non-inverting unity-gain amplifier circuit based on the LM324 which is a BJT (Bipolar Junction Transistor) Op-Amp (Operational Amplifier.) Currently KiCAD does not have SPICE style voltage or current … “SPICE”

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