作者: ghostkcleung 時間: 2017-10-19 21:28 標題: Arduino Mega 擴充板問題
圖中嘅 PWR_SEL，
意思係咪即係用塊板輸入電源？
同埋係咪輸入返 12V ？
圖片附件: 20171019_212457.jpg (2017-10-19 21:25, 65.33 KB) / 下載次數 60https://h2.hkepc.com/forum/attachment.php?aid=2018587&k=25a7233cca4e8ac200bbb2abc99b5410&t=1781959937&sid=HIDilWi4a6
作者: jorliman 時間: 2017-10-19 23:33
It has an option to power the "V" pins on all the Digital I/O (0-53) 3-pin groups (GVS) from an external power supply instead of the Arduino +5V. This is good for large numbers of servos etc.
The "Analog" (A0-A15) 3-pin groups (GVS) still use the Arduino +5V which is better from an electrical noise perspective.
This version has two options of +5V supply to all the "V" pins:
Jumper on: +5 comes from the Arduino. Should be limited to about 300 ma
Jumper off: +5 (or other appropriate voltage) comes from an external supply connected to the blue terminal strip. External power Ground "MUST" also be connected to the blue terminal strip.
Using an external supply allows more current than the Arduino Mega can supply, such as current for control of many servos or relays, and other attached devices. Usually this is +5V because most external devices require it. It is possible to use +6 volts if ALL the attached devices are the same such as Servos with that rating.
作者: ghostkcleung 時間: 2017-10-20 00:08
Thanks!
即係話如果咁樣駁(12v)，
就應該甩咗粒 Jumper ？
圖片附件: 22528713_1123713911092168_8722155138883833645_o.jpg (2017-10-20 00:07, 147.8 KB) / 下載次數 51https://h2.hkepc.com/forum/attachment.php?aid=2018625&k=11197b94e570963d96975ba9ae28bfcf&t=1781959937&sid=HIDilWi4a6
作者: ghostkcleung 時間: 2017-10-29 22:12
燒咗
我將 12V 電駁去擴展板，Jumper Off，
塊 Arduino 無電；
之後我 Jumper On，即燒。
作者: hon829 時間: 2017-10-29 22:55
成塊板淨Jumper 陣,冇任何降壓零件
