arduino photos on Flickr

Le FabLab Basse-Normandie organisait une formation au système de contrôle Arduino animé par Jean-Michel Molenaar (FabLab Grenoble) et Armand Ahmadi (Calvix).

Crédits : Relais d'sciences/G. Dupuy (2013).

Arduino - RC Car Teardown by ddewaele2000_test

Tearing down my RC Car for Arduino integration

Arduino+Rasberry by Sandro Doro

Arduino with Rf module attached by Derek Kennedy

An older style Arduino board. Replaced the 16MHz xtal with a 4MHz one. Pulled the 328 micro and refitted with a mega8.

Arduino Day 2018 by WeMake Milano

Arduino Day 2018 at WeMake

day4 - Gustavo by David Cuartielles

After burning his board, he planned to trash out some other people's work

Arduino LED power circuit by rosemarybeetle

Transistor control of eyeball power LEDs, using Arduino output as a signal to the transistor base, and using the tranistor as a simple current amplifier to supply sufficient power

MArch 2012

Arduino: Rachel - #1 by luiz alberto silva ribeiro

Arduino: Rachel - #1

Arduino with LED by Gisli Gudmundsson

Arduino Duemilanove

WS2801 stripsleds + arduino by martin gautron

Arduino Day 2018 by WeMake Milano

Arduino Day 2018 at WeMake

Arduino Day 2017 by WeMake Milano

wemake.cc/2017/02/21/torna-larduino-day-2017/

4x Channel Solar combiner by Bob Parish

Detail of the power stages.

I used TO-220 N-channel MOSFET transistors but to prevent the return ground from being broken up via through holes the transistor legs were cut short and soldered to the top layer pad.

Also, the drain tab is soldered to a large thermal pad on the top layer with no through hole for the mounting bolt. Therefore all the transistors have their drain tabs soldered to the top layer.

N-Channel MOSFETS were used due to their lower on resistance. In the case of these devices the quoted on resistance is 9 mOhms each.

As the MOSFETs are N-Channel they require the gate voltage to be higher than the source to turn on. But the transistors are used to switch the high side, 100V input from the solar panels. Therefore a charge pump arrangement was designed to pump the gate to ~8V above the source (10V less 2x diode drops).

On the right hand side of the board is the 100V to 10V flyback PSU. A local 5V linear regulator supplies the current monitor devices and feeds 5V up to the MCU controller to power the Arduino and logic circuitry.

arduino setup by fbar