Grojin's channel

Grojin added to a playlist 3 months ago

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The HD HERO2: 2x as Powerful in Every Way

Shot 100% on the new HD HERO2® camera from ‪http://GoPro.com.

The HD HERO2 is the most advanced GoPro camera, yet. To celebrate its release, we tr...

8,940,714 views

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  Chronicle - Official Trailer (2012) [HD]

  Chronicle - Official Trailer (2012) [HD]

  963,274 views
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  4 wire (Kelvin) resistance measurement tutorial

  How to use the 4 wire (Kelvin) resistance measurement technique to measure tiny resistances (in the milliohm range) using only a cheap multimeter!

  11,562 views
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  LM317 Adjustable Voltage Regulator Tutorial

  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 wa...

  76,590 views
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  Amplitude modulation tutorial & AM radio transmitter circuit

  This video covers the history of the discovery of radio waves, to the creation of simple oscillator based radio transmitters. Then I explain what m...

  49,862 views
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  Peak detector circuits!

  A tutorial on peak detectors and an example that uses the clapper circuit from my comparator tutorial video.

  Make sure you watch the comparator t...

  26,395 views
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  Comparator tutorial & clapper circuit

  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 p...

  37,030 views
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  Circuit simulation in LTSpice part 3/3

  How to create a simulation of a common emitter amplifier in LTSpice, perform a transient analysis, tweak values, and generally do cool stuff in the...

  18,262 views

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Grojin added to a playlist 3 months ago

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Circuit simulation in LTSpice part 2/3

How to set up a simulation of a band pass filter in LTSpice, perform AC analysis sweeps, generate bode plots of magnitude and phase, and investigat...

16,392 views

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  Circuit simulation in LTSpice part 1/3

  How to set up simulations in LTSpice, create bode plots of phase and magnitude for a passive RC low pass filter.

  Part 2 is here:

  http://www.youtub...

  34,239 views
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  Passive RC high pass filters

  A tutorial on passive RC high pass filters. You can use them to filter out low frequency signals, or remove DC offsets from a signal.

  Make sure yo...

  23,857 views
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  Passive RC low pass filters

  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 b...

  31,761 views
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  Fun with ultracapacitors!!

  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. Ins...

  122,775 views
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  Voltage regulator tutorial & USB gadget charger circuit

  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 ...

  213,356 views
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  Diode Tutorial & How to build an AC to DC power supply

  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 ...

  198,544 views
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  Electrical Transformer Tutorial

  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 withou...

  99,144 views

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Grojin added to a playlist 3 months ago

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Oscillator tutorial in HD!

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 osc...

43,928 views

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  THE BEST Multimeter tutorial (HD)

  Afroman shows you what to look for in a multimeter, and how to use a multimeter to measure voltage, current, resistance and continuity.

  Multimeter ...

  396,878 views
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  Voltage divider tutorial

  This video shows the basics of voltages dividers and how to build one. Power consumption considerations and equivalent series resistance issues are...

  48,182 views
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  Laser Tripwire circuit / photoresistor tutorial

  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...

  86,685 views
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  Operational Amplifier Tutorial & super microphone circuit

  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 w...

  106,931 views
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  Transistor / MOSFET tutorial

  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 s...

  776,303 views
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  Make The World's Simplest Hand Cranked LED Flashlight

  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.

  264,876 views
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  How to Turn an Old UPS into an Alkaline Battery Charger!

  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 i...

  146,467 views

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Grojin added to a playlist 3 months ago

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PWM Tutorial in HD

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 th...

138,361 views

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  Function Generator Tutorial in HD

  Afroman shows you the basics of function generators AKA signal generators. An LED dimmer circuit example is given. Don't forget to vote 5!

  38,976 views
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  Capacitor Replacement Tutorial

  Afroman goes over some basic information about capacitors: Capacitance, voltage ratings and polarity. Once you know what you are doing, you can rep...

  583,778 views
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  Oscilloscope Tutorial Part 3 - Advanced functions

  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 measu...

  96,404 views
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  Oscilloscope Tutorial Part 2 - Basic usage

  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...

  125,732 views
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  Oscilloscope Tutorial Part 1 - Choosing an oscilloscope

  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...

  170,130 views

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