What is inside an uninterruptible power supply? A lot of useful components! Afroman shows you a teardown of a UPS and uses some of the components inside to build a battery charger that will work with most types of batteries. For more info see www.afrotechmods.com
UPS Howto Teardown Battery Charge Electronics Components Alkaline Charger Transistor Regulator Afrotechmods
This video covers the history of the discovery of radio waves, to the creation of simple oscillator based radio transmitters. Then I explain what modulation and amplitude modulation are, and show you how to build a low powered AM radio transmitter. Original design by Stefan0719: www.youtube.com Kickass music by imeddy www.youtube.com
AM amplitude modulation radio transmitter circuit tutorial electronics RF electromagnetic frequency Afrotechmods
A tutorial on the LM317 voltage regulator. Shows you how to make a 1.25 to 25V adjustable voltage supply, or choose any other output voltage you want. An example of a fan speed controller is shown.
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Afroman goes over some basic information about capacitors: Capacitance, voltage ratings and polarity. Once you know what you are doing, you can replace faulty caps on your circuit board and bring your electronics back to life! Don't forget to vote! Panasonic FM series capacitors are usually a good choice.
Cosview MV200UM USB microscope review. Review sample provided by Saelig: www.saelig.com Stand: www.saelig.com
USB digital microscope review Cosview MV200UM microscopic macro camera Afrotechmods
Afroman covers the basics of how transformers work, where to shop for step down mains transformers, and how to wire one up to mains voltages without killing yourself. European and North American wiring is discussed. He finishes up with a quick example of AC to DC conversion in an unregulated dual rail power supply. Watch the followup video on diodes and AC to DC conversion here: www.youtube.com Don't forget to subscribe!
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Afroman goes over the basics of how to use an operational amplifier to amplify tiny voltages, and builds a circuit to listen to very faint sounds with a microphone. Don't forget to vote 5! The final microphone amplifier circuit diagram is here: www.afrotechmods.com For more information about amplifiers, Google "inverting amplifier" "non-inverting amplifier" "instrumentation amplifier" "class A amplifier" "class B amplifier" "class AB amplifier" and that should give you a lot to chew on.
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Afroman blows up resistors, electrolytic capacitors and transistors. Don't forget to thumbs up! The music is the final part of Tchaikovsky's 1812 overture.
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Afroman goes over the basics of PWM and shows you how to cheaply build a PWM circuit that can dim LEDs, control the speed of a motor, or control the power going to pretty much anything you want! Don't forget to vote 5! Circuit diagrams at: afrotechmods.com
Pwm Circuit Electronics Dimmer Speed control Pulse Width Modulation Afrotechmods
This video covers the basics of linear voltage regulators - what they do, how to wire them up, and where to find them. Then I give a basic example of how to build a 5V supply that can be used to power USB powered gadgets. Don't forget to subscribe! This video builds on material covered in my tutorial on building unregulated power supplies: www.youtube.com
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How to build your own linear adjustable power supply based on LM317. In this tutorial I'll explain how linear power supply works, what parts it consists and a lot of small details, like how to calculate smoothing capacitor value, or how to choose a transformer. Plus you'll see how to build an actual power supply. ADDITIONAL INFO & PHOTOS: jumperone.com And you can find some more cool stuff on www.jumperone.com Twitter: twitter.com Videos from other people on similar topics: www.youtube.com - Electronics Thermal Heatsink Design Tutorial from Dave Jones www.youtube.com - Diode Tutorial & How to build an AC to DC power supply from Afrotechmods www.youtube.com - Electrical Transformer Tutorial from Afrotechmods Keywords: LM317 adjustable power supply tutorial linear +5v +12v 5v 12v +3.3v 3.3v lab bench laboratory how to how-to hho diy electronic hack make tinker phil levchenko jumperone electronics instructions howto heat dissipation smoothing capacitor bridge rectifier diode voltage drop
LM317 adjustable power supply tutorial linear +5v +12v 5v 12v +3.3v 3.3v lab bench laboratory how to how-to hho diy electronic hack make tinker phil levchenko jumperone electronics instructions howto heat dissipation smoothing capacitor bridge rectifier diode voltage drop Jumper One TV
I got hold of some 2600F capacitors that can dump hundreds of amps. Normally these are used in electric cars to handle sudden stops and starts. Instead, I use them to vaporize bits of metal, and show you the 3 most important capacitor equations along the way.
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How to use an N channel MOSFET to turn anything on and off. Also, remember to put a 100k resistor between gate and ground if you want your FET to stay off by default!
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This video covers the basics of diodes, bridge rectifiers, and how to build simple unregulated AC to DC power supplies than can handle a few mA up to several Amps. I recommend watching my transformer tutorial first if you are confused about where I am getting the AC voltages from: www.youtube.com This is a followup video on how to make a regulated voltage supply: www.youtube.com Don't forget to subscribe!
diode pn junction bridge rectifier forward voltage half wave full AC DC electronics semiconductors tutorial schematic unregulated power supply DIY Afrotechmods
The last 100% analog ASA I will make for a while. For a challenge I may one day build a larger one, but for now, this is it. The next version will have 50 LED's and 5 bands. And after all that it will require less parts. Then, hopefully the next vision will be done with a micro controller. Need help? Youtube Afrotechmods for a full OPAMP tutorial How to build: makeprojects.com
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Had a bunch of old drives laying around and came to think of Afrotechmods and all other videos of this mod. www.afrotechmods.com Once you get one to work you are instantly transferred back to the childhood again jumping and laughing out of pure excitement.
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Here is how I built a robotic cat toy to keep my cat out of trouble. Source code for the project is at www.afrotechmods.com
Cat Toy Robot Microcontroller Laser Pointer Electronics Afrotechmods
The basics of how inductors work, a demo showing an inductor filtering out high frequency signals, a quick low pass LC filter, and a demo showing the magnetic field created around inductors.
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How to build your own linear adjustable power supply based on LM317. In this tutorial I'll explain how linear power supply works, what parts it consists and a lot of small details, like how to calculate smoothing capacitor value, or how to choose a transformer. Plus you'll see how to build an actual power supply. ADDITIONAL INFO & PHOTOS: jumperone.com And you can find some more cool stuff on www.jumperone.com Twitter: twitter.com Videos from other people on similar topics: www.youtube.com - Electronics Thermal Heatsink Design Tutorial from Dave Jones www.youtube.com - Diode Tutorial & How to build an AC to DC power supply from Afrotechmods www.youtube.com - Electrical Transformer Tutorial from Afrotechmods ...bonus: youtu.be Keywords: LM317 adjustable power supply tutorial linear +5v +12v 5v 12v +3.3v 3.3v lab bench laboratory how to how-to hho diy electronic hack make tinker phil levchenko jumperone electronics instructions howto heat dissipation smoothing capacitor bridge rectifier diode voltage drop
LM317 adjustable power supply tutorial linear +5v +12v 5v 12v +3.3v 3.3v lab bench laboratory how to how-to hho diy electronic hack make tinker phil levchenko jumperone electronics instructions howto heat dissipation smoothing capacitor bridge rectifier diode voltage drop Jumper One TV
A tutorial on op-amp comparators, and a demo circuit that lights up an LED when the sound volume reaches a preset threshold. Watch this video on peak detectors next! www.youtube.com
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Afroman takes a cadmium sulphide photoresistor and uses it to build a laser tripwire circuit that can trigger pretty much anything. Don't forget to vote 5 and watch Afroman's Transistor tutorial if you need more info on how to switch different gadgets on and off.
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Afroman shows you the basics of function generators AKA signal generators. An LED dimmer circuit example is given. Don't forget to vote 5!
electronics function generator signal circuit LED dimming PWM Afrotechmods
Afroman debunks the popular myth that it's not the volts that kill you, it's the amps. Basically, the volts directly determine the current flowing through your body, so the phrase is stupid and dangerously misleading.
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Afroman reviews the HP 7660 printer that he found in a dumpster. It got the highest 3DMark score of any printer tested to date. Don't forget to vote 5!
This video shows the basics of voltages dividers and how to build one. Power consumption considerations and equivalent series resistance issues are also discussed. Don't forget to vote 5!
voltage divider circuit electronic resistor tutorial Afrotechmods
Inductive spiking and how a diode can save your circuits.
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Different ways you can protect your circuit from backwards power connections. Diodes, schottky diodes and P channel MOSFETs.
Tutorial electronics electric circuit P-FET MOSFET Diode protection P-channel semiconductor voltage polarity Afrotechmods
The first part in a series of tutorials to teach you the basics of oscilloscopes. In this part: What is an oscilloscope, why do you need one, which scopes are a good deal and where do I get one? Don't forget to subscribe and vote!
Oscilloscope Electronics measurement Tutorial waveform circuits troubleshooting repair Afrotechmods
OWON SDS6062 oscilloscope review. Review sample provided by Saelig: www.saelig.com
OWON SDS6062 SDS 6062 oscilloscope review electronics engineering electrical measurement test Afrotechmods
Afroman shows you what to look for in a multimeter, and how to use a multimeter to measure voltage, current, resistance and continuity. Multimeter link: www.amazon.com Top of the line professional multimeter: www.amazon.com
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A tutorial on passive low pass RC filter circuits, and how they affect the frequency content of signals. An example of an RC filter that could go before a subwoofer's amplifier is given. The sound clips are from Pendulum's Slam in Hold Your Colour.
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The second part in a series of tutorials to teach you the basics of oscilloscopes. In this part: Oscilloscope probe settings, how to use a probe, vertical/horizontal scaling, DC and AC coupling. Don't forget to subscribe and thumbs up!
Oscilloscope Electronics measurement Tutorial Volts troubleshooting repair probe X1 X10 attenuation AC DC voltage ripple Afrotechmods
The final part in a series of tutorials to teach you the basics of oscilloscopes. In this part: auto and one-shot trigger settings, 2 channel measurement, math functions. Don't forget to subscribe and vote 5!
Oscilloscope electronics tutorial triggers math troubleshooting repair Afrotechmods
An intro to passive low pass RL filters. An example of a 2kHz audio crossover circuit for a woofer is given, where the low frequencies are allowed to pass through and the high frequencies get filtered out. Music credit: soundcloud.com
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How to use the 4 wire (Kelvin) resistance measurement technique to measure tiny resistances (in the milliohm range) using only a cheap multimeter!
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The first part in a series of videos about the basics of electricity.
This tutorial covers the basics of oscillators - what they are, what they are used for, and it shows a couple of demo circuits with a sine wave oscillator and a square wave oscillator. Clock generator circuits for digital processors are also briefly mentioned. Don't forget to vote upvote!
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The basics of inductance - how increased inductance creates a heavier filtering effect, and how coil windings and core materials affect the inductance of an inductor. A cheap LCR meter: www.ebay.com
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A guide on how to open up a slim Playstation 2. Different PS2 versions may have slight variations of the internal parts.
Random video. The colour changes a bit as the current gets turned up.
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I spent several days etching plexiglass by hand with a razor blade. Then I embedded LEDs to light up the Autobot and Decepticon logos. A microcontroller controls the fading of the LEDs, replicating the transition effect from the 80s cartoon.
Transformers Autobots Decepticons Art PWM LED Plexiglass Microcontroller optimus Afrotechmods
Sped up by 3x to alleviate boredom.
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Normally rated for 20mA. When 100mA is flowing it turns from green to yellow. At 150mA, it slowly and permanently turns yellowy-orange. At 200+mA it permanently turns red and soon fails.
Got an old crappy printer that is just sitting around? You can use the stepper motors inside to make a hand cranked flashlight! Here is how.
