Afrotechmods – Fun with electronics!

Why electrolytic capacitors are actually kinda shitty 💩

Afroman — Sat, 17 Mar 2018 19:00:20 +0000

Electrolytic capacitors are common, but knowledge of their limitations is uncommon. A demonstration is shown highlighting the difference in performance between electrolytic and ceramic capacitors in power supplies. Other topics discussed in the video: Electrolytic capacitor construction, ceramic capacitors, ESR, ESL, impedance curves, why “0.1uF”, and more.

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Siglent SDG6000X Arbitrary Waveform Generator Review

Afroman — Sat, 17 Mar 2018 18:48:08 +0000

A review of Siglent’s SDG6052X 500MHz arbitrary waveform generator with the I/Q upgrade.

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Arduino and Servos: How to Make a Laser Turret with XOD

Afroman — Sat, 30 Dec 2017 03:04:44 +0000

A tutorial on what servos are, how they work, and how to use them. Then I build a laser turret using a pan-tilt servo kit and an Arduino Uno. The Arduino is programmed with XOD, a free visual programming language. Download XOD Another XOD tutorial Hitec HS-311 servo Sub-micro servo pack Laser diodes Pan-tilt servo […]

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Fun with 1.1GHz Potato chips

Afroman — Sun, 30 Apr 2017 21:48:06 +0000

I built a ring oscillator using a 1.125GHz 74 series logic inverter IC from Potato Semiconductor. It was fun.

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Siglent SSA3032X Spectrum Analyzer Review & Experiments

Afroman — Sat, 01 Apr 2017 20:29:29 +0000

Afroman reviews Siglent’s SSA3000X series spectrum analyzer and all the options. There is some info about RF measurements for beginners and some usage experiments are also performed. Firmware version 1.2.8.2. ==========TABLE OF CONTENTS======== 0:00 Intro 0:33 Unboxing and discussion of inputs 1:24 Screen 1:59 Build quality, fan noise, user interface 5:35 AM and FM demodulation […]

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You can learn Arduino in 15 minutes

Afroman — Fri, 17 Mar 2017 21:00:48 +0000

The ultimate Arduino microcontroller tutorial for beginners. Learn what Arduino is, how to choose an Arduino, then build a simple data logger, LED dimmer and motor speed controller. Sponsored by Audible – Get a free 30 day trial & download one free title Example UNO kit Example UNO robot kit

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How to make a simple 1 watt audio amplifier (LM386 based)

Afroman — Tue, 17 Jan 2017 18:29:17 +0000

A tutorial on how to use the popular LM386 class AB audio amplifier IC to build a simple mono 1 watt audio amplifier. It costs less than $3 in parts! There is also a brief discussion of how to use high pass filters to prevent op-amp oscillation and subsequent noise. Sponsored by The Great Courses […]

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Basic Electricity – Power and watts

Afroman — Wed, 30 Nov 2016 03:23:04 +0000

A tutorial on electrical power and watts. A practical example of light bulb power measurement is shown as well as a demo how to calculate appropriate resistor sizes.

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Basic Electricity – Resistance and Ohm’s law

Afroman — Wed, 09 Nov 2016 19:47:06 +0000

A tutorial on the basics of resistance, resistors, and Ohm’s law which describes the relationship between voltage, current and resistance. I also show you how to build a simple resistor + LED circuit. 300 LEDs for $13 500 resistors for $12 9V battery clips Adjustable power supply Ohmnilabs

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LED Basics

Afroman — Sat, 22 Oct 2016 03:59:46 +0000

A tutorial on the basics of using LEDs (light emitting diodes). Polarity, forward voltage and current are discussed. 300 LEDs for $13 500 resistors for $12 Adjustable power supply

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