General

At height, always work with a stepladder (as high as possible). Do not use a chair to drill, screw, etc. at height.

Lighting

Technology:
- LED: best type available currently (2024). Low consumption.
- Halogen: best power, high consumption, heat.
- Compact fluorescent: good consumption, OK power, unfortunately there is a lighting time for high power. Obsolete.
- Incandescent: worst consumption. Obsolete.

Screws are the most common type of fastening mechanism. They come in many different varieties.

Rivets are an alternative to screws. However, they have the disadvantage that they are permanent; if you need to untie what you fastened, you will destroy the rivet while removing it.
You can differentiate between a screw and a rivet if you don't see any imprint in the head. Usually the rivet will just have a hole (circle) in the middle of the head.
There are various types of rivets, for instance:
- Blind rivets;
- Tubular rivets.
To remove a rivet, you will need a drill (with a metal drill bit). See this tutorial. If the rivet head does not come off, drill deeper: you may have to drill quite a bit before it gets off and can be removed.

The type of material is extremely important. For plaster you have to take general material dowels.
There are also nylon dowels.

Spade connectors, that can be used to wire electric circuits, must be crimped with a proper tool (don't use tape). Crimp at the middle section of the spade connector.

Electric dominos are being replaced by electric connectors that don't require screwing.

For a 3 position toggle switch, normally only 3 pins are required (one input to carry the phase, and two outputs to carry the phase to the motor various inputs). I bought a 4 pin one, you can just ignore / not use the second input pin and it works correctly. Note that the neutral and protective earth wires should be connected separately from the switch.

What is important is that the voltage between the adapter and the device matches. Then the power of the transformer can be higher, it is not a problem (this corresponds to a higher amperage). If the power is lower (lower amperage) the device is not at risk, it is the transformer that will heat up and wear out (it will often blow quickly).
Note: the power corresponds to the product of the voltage and the intensity. Example: 12v x 3A = 36 Watts.