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.
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.
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 … Read more
Small tutorial, how to make PCBs at home, using photoresist methode.
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 … Read more
This video covers the basics of linear voltage regulators – what they do, how to wire them up, and where to find them. Then I … Read more
This video shows the basics of voltages dividers and how to build one. Power consumption considerations and equivalent series resistance issues are also discussed.
In electronics, a voltage divider (also known as a potential divider) is a simple linear circuit that produces an output voltage (Vout) that is a fraction of its input voltage (Vin). Voltage division refers to the partitioning of a voltage among the components of the divider.
The formula governing a voltage divider is similar to that for a current divider, but the ratio describing voltage division places the selected impedance in the numerator, unlike current division where it is the unselected components that enter the numerator.
Video tutorial Multimeter – how to use a multimeter to measure voltage, current, resistance and continuity
Afroman shows you what to look for in a multimeter, and how to use a multimeter to measure voltage, current, resistance and continuity.
A multimeter or a multitester, also known as a or VOM (Volt-Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter may include features such as the ability to measure voltage, current and resistance. Multimeters may use analog or digital circuits—analog multimeters (AMM) and digital multimeters (often abbreviated DMM or DVOM.) Analog instruments are usually based on a microammeter whose pointer moves over a scale calibration for all the different measurements that can be made; digital instruments usually display digits, but may display a bar of a length proportional to the quantity measured.
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.
A Short & Easy Test To Check If A Bridge Rectifiers Shorted or Not!!Hope This Helps Someone Out There.
A bridge rectifier makes use of four diodes in a bridge arrangement to achieve full-wave rectification. This is a widely used configuration, both with individual diodes wired as shown and with single component bridges where the diode bridge is wired internally.
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This is how to build a homemade TV antenna so that you can catch FREE HDTV. All you need is some copper wire, screws, washers, a piece of wood and a balum.
Schematics for HDTV homemade Diy Antenna
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