schematics
Video and Schematic Breakdown: MadLab Junior Theremin
I found a great beginner’s project, the MadLab Junior Theremin, as a cheap electronics kit available on Jameco! Build and Demo Video Here’s a video from Youtuber 3DSage that shows …
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Velleman MK171 Voice Changer Circuit
Anyone who has ever watched Doctor Who will be familiar with the peculiarly distorted voice of the Dalek. According to the Wikipedia entry, the original voice sounds were created with …
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Learning more about the Princeton PT2399
I have recently been watching YouTube videos about the Princeton PT2399 and I came across a very educational video by user Electronics Freak. The first part of the video gives …
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Eagle CAD Printed Circuit Board Parts Library and Schematics FOR FREE on Github!
Over the years, I have greatly benefited from the generous work of the open source community. Whether it’s a reverse-engineered schematic of a early 70’s drum machine to source code …
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MIDI Buffer
Just found an awesome MIDI schematic used in a production model MIDI multiple-output buffer. In the works is a tutorial on how to make you own MIDI buffer! I’ll even …
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Staircase CV (Control Voltage) Generator
Use this circuit with your circuits to output a staircase-style CV. The 4516 Binary UP/DOWN Counter is controlled by a two 4093 CMOS NAND Gate oscillators; one controls the clock …
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555 Monostable Multivibrator
The 555 timer can be configured with external components to output a single pulse for a fixed duration. When the switch is toggled to “ON”, the output will go high/1/ON …
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True Bypass Passive Ring Modulator
A simple 2 Transformer, 4 Germanium Diode Ring Modulator with a true bypass switching scheme. Includes input for Carrier Wave modulation. Power is only required for the status LED.
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Passive A/B Box
A simple switching circuit that allows you to route a signal to two different paths. LEDs help indicate which signal path is active, although this circuit can also be used …
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