![\"Relevant](\"https:\/\/fenstar.co\/wp\/wp-content\/uploads\/2016\/02\/Darnington-Hilight.png\")
<\/a>Relevant portions of the board for the darlington array shown highlighted.<\/p><\/div>\n
<\/p>\n
I think the arduino motto is “cheap, quick, and dirty,” and the darlington array certainly fits that. This setup allows eight outputs of either VIN or 5V at 500mA each and is used under the assumption that you don’t need to worry about response times or anything like that. If you did, they you really might want to choose something other than a $5 UNO board.<\/p>\n
The magenta (D10-13) and fuchsia (A0-3) \u00a0headers are intended to control the darlington (blue headers) via jumpers.<\/p>\n
The read header is connected to one of the yellow headers to supply voltage (5V or VIN) to the array.<\/p>\n
The orange headers\u00a0provide output power and are conveniently located next to ground headers in green.<\/p>\n
![\"Parts](\"https:\/\/fenstar.co\/wp\/wp-content\/uploads\/2016\/02\/Dar-Sch-Highlight.png\")
<\/a>Parts of the schematic relevant to the darlington are shown highlighted in colors as used above.<\/p><\/div>\n
And, it would appear wordpress is\u00a0shrinking my images by just a bit because of borders. I did not notice that before *sigh* I guess I need to hunt through the css\u00a0and see what I did…<\/p>\n","protected":false},"excerpt":{"rendered":"
The UNO\u00a0has some great advantages for people starting out and playing around, but the 5v\/40ma output power limit can be a bit limiting without additional circuitry. While the UNO is not intended to drive anything directly, it kind of defeats … Continue reading