tmplab

a workshop to (re)learn electonics using the [Falstad](http://www.falstad.com/circuit/circuitjs.html) interface.

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README.md

Basic electronic training

Objective: to provide electronic circuits for initiation

Ideas

Alternation between theory and practice, for example first introducing a new component and testing it, then providing a useful application.
Provision of importable files in a circuit simulator to learn and test on a computer
- at http://www.falstad.com/circuit/circuitjs.html
- others if possible?
Orientation of practical parts on assemblies useful for gardening: controlling pumps with photoresistors, etc.
Reuse of the same components to limit the actual application cost
Limitation of the program to a final circuit of average level, other training with other orientations to progress

Sessions / Lessons / Tours

What is the current?
Representation symbols
Simple circuits + a humidity detector
Serial / parallel circuits + Relay control
Potentiometers + thermostat with ampliop in comparator / open loop mode
Capacitors + twilight sprinkling

0. What is the current?

It is the circulation of a certain quantity of electrons through various components of a closed circuit.

To understand more intuitively what is happening we can use an analogy: water.

It represents the electrons. As long as the water is stagnant, there is no current. For there to be one, the water has to move.

This analogy is not perfect, but it is useful.

Let's apply it to 5 concepts to understand electricity:

Voltage
Intensity
Resistance

Tension It is the difference in height that exists between the two highest and lowest points for a waterfall. The water will flow in that direction. This notion is clearer when it is called Potential Difference (DDP). Electrons only circulate if there is DDP. It takes a high potential (the + of the battery) and a low potential (the - of the battery) for electricity to flow. We measure in Volts.

Resistance This is the diameter of the tap through which the water flows. The smaller the tap, the greater the resistance, and the less current it lets through. This analogy of the tap is false if we apply it to closed circuits because there is no acceleration in electricity. We can use the analogy of Obelix and the Romans, that of supermarket checkouts or consider that the residence is like sand that will be deposited all along the circuit and reduce the possible flow. We measure in Ohms.

Intensity This is the amount of water that will flow in a given time. For example, one liter per second. The stronger the PDD and the lower the resistance, the higher the intensity will be. We measure in Amps.

Inductance and Capacity are interesting but require more knowledge.

1. What are all these symbols?

There are plenty of components that all have a symbol, and some even have multiple symbols depending on the cultures and specifics of the component.

The symbol is an abstract representation of the object, but it always takes its actual number of pins.

ex: the lamp

2. Simple circuits: How do I build something minimal?

Theoretical: The current, the direction of the current
Components: DC power supply, Resistor, Switch, LED
Oscilloscopes: place in different places

Current: open / closed circuit with switch + short circuit
LED: observe the direction of the current, no internal resistance = blast the LED without resistance
Resistors: modify the resistance to observe the effects
Power supply: vary the current
Ohm's law: measure the power consumed

Application: a humidity detector