Boite de simulation

[nicolasdb]

En attendant que les PCB arrivent, je fabrique une boite de simulation pour tester la programmation sans la maquette.

[nicolasdb]

à quoi sert le 3ème pin des connecteurs 5.5x2.1mm? (barrel power plugs)
https://electronics.stackexchange.com/questions/90529/what-to-do-with-third-contact-in-dc-barrel-plug-with-only-two-input-contacts

When you insert the plug, the connection between pins 3 and 2 breaks. This is useful for cutting a battery out of the circuit when a DC adapter is plugged in. Imagine you have a battery which is grounded via the 3-2 connection. When you plug in, 3-2 breaks and so the battery's ground connection is lifted. Now the battery is protected from two unwanted actions: discharging, and being charged. (It's still a good idea to put diodes in the circuit in case the switch fails for whatever reason.)

[nicolasdb]

Pour remplacer les 2 sorties leds-array en 12V, je place 2 leds 9V 402 de chez electron discount

https://www.befr.ebay.be/itm/140668935540

120ohms pour une tension d'utilisation de 12v