ESP8266 Community Forum

- Tue Jun 09, 2015 11:18 am #19944 OK but where is the Utube video system?
Could you maybe label the picture ? I see a battery , an ESP on top of something , an arduino mini pro and another board ?
On the video I see an extra propeller ? running .

Get you modules here:

https://www.banggood.com/custlink/KvGGhGF4wG

- Tue Jun 09, 2015 12:20 pm #19951 Hi,

"something" is a connector I made (connects VCC and RESET and CH_PD pins of ESP8266-01).


I tried to get it more clear using Fritzing (http://stamm-wilbrandt.de/en/forum/wifi.motor.jpg):


Hermann.

- Tue Jun 09, 2015 3:19 pm #19965 If you really connect your motor like that, it's a good way to kill your arduino...
When switching DC motors, relays or other inductive loads, you need to connect a diode connected in parallel (in blocking direction). Otherwise the energy stored in the coil will cause a high voltage spike when the motor is switched off, which can easily fry your arduino. See http://en.wikipedia.org/wiki/Flyback_diode
The motor can probably also draw a lot more current, than an arduino's I/O pin can handle. You should not drive it directly, use a transistor or motor driver IC instead.

- Tue Jun 09, 2015 4:25 pm #19970 Thank you, I know about that.

Currently I am bound to 3.3V by the ESP8266-01, therefore only the 3.3V Arduino Pro Mini and a micromotor that can run with 3V.

I will run my other motors at 11.1V and 14.8V (3/4 LiPos) via L293D motor controller.

But that motor controller has 5V logic and I am waiting for logic level converter modules ordered from Aliexpress 3 weeks ago:
http://www.aliexpress.com/item/1Pcs-5V-to-3-3V-IIC-I2C-Logic-Level-Converter-Bi-Directional-Module-for-Arduino/32307221398.html


More details on the "something"/connector tytower asked for can be found in this posting:
http://www.esp8266.com/viewtopic.php?f=13&t=3346#p19097


Hermann.