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electronics_basics [2016/06/07 12:19] psykhaze [D-Transistor] |
electronics_basics [2016/07/18 15:36] (current) psykhaze [E-Basic Mixers] |
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{{ ::neonking:kerrdam.jpg?direct&300 |}} | {{ ::neonking:kerrdam.jpg?direct&300 |}} | ||
- | In comparison to water , capacitor is like a dam in the middle of our water flow, storing water for some time. | + | In comparison to water , capacitor is like a dam in the middle of our water flow, storing water for some time. In both cases, if no current/water flows into or out of the capacitor/dam, the water level/voltage remains constant. And the more current/water flows in or out, the faster the water level/voltage changes. |
- | The unit for electrical capacitance is **Farad**. | + | The unit for electrical capacitance is **Farad**. This corresponds to the volume of the lake. The higher the capacitance/volume, the more current/water the capacitor/dam can accept for each volt/meter rise. |
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{{youtube>PQM8ozRQzI8}} | {{youtube>PQM8ozRQzI8}} | ||
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- | //FIXME Center the vid and remake it with a SID or FM synth for example - Maybe Put it after mixing / Filtering ?// | ||
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=====5 - Mixing and Filtering===== | =====5 - Mixing and Filtering===== | ||
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The signal also has to be quantized in voltage/amplitude, because the computer has to represent each sample as a single number (with limited precision, often an integer (float for high precision) ). | The signal also has to be quantized in voltage/amplitude, because the computer has to represent each sample as a single number (with limited precision, often an integer (float for high precision) ). | ||
- | {{ ::neonking:effetescalier-en.jpg?direct |}} | + | **//GFX on Correction//** |
If the numbers representing samples are integers, the quality of the quantization is called the **bit depth**. | If the numbers representing samples are integers, the quality of the quantization is called the **bit depth**. | ||
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**BJT**s and **FET**s perform **similar** functions, but with a **different type of input**. | **BJT**s and **FET**s perform **similar** functions, but with a **different type of input**. | ||
Both kinds of transistors are devices that control the current flowing through them and can be used as digital switches or analog amplifiers. | Both kinds of transistors are devices that control the current flowing through them and can be used as digital switches or analog amplifiers. | ||
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- | // FIXME Advice some usual refs to play with // | ||
In the **digital case**, the circuit around the transistor is designed so the input signal (current for a BJT or voltage for a FET) is large enough to turn on the transistor much more than the actual needed output current, or small enough to turn off the transistor completely. | In the **digital case**, the circuit around the transistor is designed so the input signal (current for a BJT or voltage for a FET) is large enough to turn on the transistor much more than the actual needed output current, or small enough to turn off the transistor completely. | ||
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{{ ::neonking:opamptransistorlevel_colored.png?direct&300 |}} | {{ ::neonking:opamptransistorlevel_colored.png?direct&300 |}} | ||
- | //TODO : Advice some usual refs like MCP6004 or TL072 to play with // | + | **TL072/TL074/MCP6004** are some refs of Opamps used in MIDIbox Designs |
It's represented in schematics by it's Symbol | It's represented in schematics by it's Symbol | ||
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{{ ::neonking:oscillator.jpg?direct&500 |}} | {{ ::neonking:oscillator.jpg?direct&500 |}} | ||
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- | //TODO : Find a SIN alike circuitry to be redrawn// | ||
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{{ ::neonking:mixers.jpg?direct&500 |}} | {{ ::neonking:mixers.jpg?direct&500 |}} | ||
- | //TODO : Maybe talk quiclky about the impedance issue & differences between active and passive mixers// | ||
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====F-Basic Active First-Order Filters==== | ====F-Basic Active First-Order Filters==== | ||
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===Common Resistor/Capacitor Values for Cutoff Frequencies=== | ===Common Resistor/Capacitor Values for Cutoff Frequencies=== | ||
- | //TODO : Add a basic table of usable Resistors/Capacitors values for some useful Cutoff Frequencies, with a base like that (in hertz) : 60 - 160 - 250 - 500 - 1000 - 2000 - 3500 - 5000 - 8000 - 10000 - 12000 - 15000 | + | //FIXME Add a basic table of usable Resistors/Capacitors values for some useful Cutoff Frequencies, with a base like that (in hertz) : 60 - 160 - 250 - 500 - 1000 - 2000 - 3500 - 5000 - 8000 - 10000 - 12000 - 15000 |
// | // | ||
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=====11 - Going Further===== | =====11 - Going Further===== | ||
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__Theory__ | __Theory__ | ||
- | https://en.wikipedia.org/wiki/Fast_Fourier_transform | + | * [[https://en.wikipedia.org/wiki/Operational_amplifier|Wikipedia Operational Amplifier]] |
- | + | * [[https://en.wikipedia.org/wiki/RLC_circuit|Wikipedia RLC Circuits]] | |
- | https://en.wikipedia.org/wiki/RLC_circuit | + | * [[https://en.wikipedia.org/wiki/Transistor|Wikipedia Transistor]] |
- | + | * [[https://en.wikipedia.org/wiki/Vacuum_tube|Wikipedia Vacuum Tube]] | |
- | https://en.wikipedia.org/wiki/Transistor | + | * [[https://en.wikipedia.org/wiki/Fast_Fourier_transform|Wikipedia FFT]] |
- | + | ||
- | https://en.wikipedia.org/wiki/Vacuum_tube | + | |
- | + | ||
- | https://en.wikipedia.org/wiki/Integrated_circuit | + | |
- | + | ||
- | https://en.wikipedia.org/wiki/Operational_amplifier | + | |
__Practical__ | __Practical__ | ||
- | http://sound.westhost.com/articles.htm | + | * [[http://sound.westhost.com/articles.htm|Elliott Sound Products]] |
- | + | * [[http://www.electronics-lab.com/|Open Source Electronic projects]] | |
- | http://www.electronics-tutorials.ws/ | + | * [[http://www.electronics-tutorials.ws/|Electronic tutorials]] |
- | + | * [[http://www.discovercircuits.com/|DiscoverCircuits Archive]] | |
- | - French - http://www.sonelec-musique.com/electronique_realisations.html | + | |
- | + | ||
- | //TODO : replace the last link by an english equivalent archive of basic Audio Circuitry, Power supplies etc// | + | |