View source for KS0438 Keyestudio 16-channel SERVO Shield for Micro:bit


[[image:Ks0438-1.png|thumb|400px|right|Keyestudio 16-channel SERVO Shield for Micro:bit ]]

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== Overview == 
Have you try driving a bunch of servo motors by micro:bit main board but failed? Micro:bit main board outputs the voltage DC3.3V, but servo motors generally need to drive with DC5V; the driving current of micro:bit main board is very small, it’s also not enough to use the IO pins to drive a bunch of servo motors.  <br>
It's what you've been waiting for － keyestudio 16-channel SERVO Shield for Micro:bit. It mainly integrates PCA9685PW chip, which communicates with micro:bit main board through I2C.   <br>

The SERVO Shield has 16 IO pins for steering 16 Servo motors. For easy wiring, we extend the control pin of each channel to G V S interface － 3pin header with a pitch of 2.54 mm. The voltage of V pin on the Servo shield is 5V. <br>
The Servo Shield can be supplied with power either from the Micro USB connector (DC5V input), or 2 green terminal blocks (DC 7-12V input). <br>
Besides, the Servo shield also comes with 8 golden edge connectors. It allows an easy way to connect additional circuits and sensors/modules hardware to the edge connector on the BBC micro:bit or 3.3V output pin. 
<br>[[File:Ks0438-2.jpg|450px|frameless|thumb]]<br>  

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<span style=color:red> '''Special Note:'''  <br>
Generally, the no-load current of the servo is about 220mA, and the maximum current that the Micro USB can withstand is 2A.  <br>
If use the Micro USB interface to power, we can't drive 16 servos at the same time.   </span><br>

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== Technical Details ==
* I2C input, controlling 16-channel PWM output; control 16 Servos
* Control chip: PCA9685PW
* Micro USB port: DC 5V
* Terminal blocks: DC 7-12V
* Frequency: 40-1000Hz
* Dimensions: 63mm*43mm*12mm
* Weight: 18.6g

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== Hookup Guide ==
<br>[[File:Ks0438-3.jpg|450px|frameless|thumb]]<br>  

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== Test Code ==
Before create the test code, need to add the library package first.  <br>
Go to the Microsoft MakeCode Editor https://makecode.microbit.org/#editor   <br>
Click on the Extensions:  
<br>[[File:Ks0438-4.jpg|450px|frameless|thumb]]<br> 
 
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Then enter the link https://github.com/jdarling/pxt-pca9685 and search.
<br>[[File:Ks0438-5.jpg|450px|frameless|thumb]]<br>  

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Click the pca9685 to add the library extension
<br>[[File:Ks0438-6.jpg|450px|frameless|thumb]]<br>  
<br>[[File:Ks0438-7.jpg|450px|frameless|thumb]]<br>  

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Extension added successfully, you can see the corresponding project on the blocks bar.
<br>[[File:Ks0438-9.jpg|450px|frameless|thumb]]<br>  

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'''Code:''' <br>
<br>[[File:Ks0438-10.jpg|450px|frameless|thumb]]<br>   

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== Test Result ==
Done wiring, send the test code to micro:bit main board. Supply the power by micro USB port or green terminal blocks, Servo motors will rotate back and forth between 20°and 150°


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==Resource==
*'''Download all the relevant info. from the link:'''<br>
https://drive.google.com/open?id=1HspE_0Xw_fxiMDFJCz41WrLUu5HCo4-T


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==Buy from ==
*[ '''Official Website''']

*[https://www.aliexpress.com/store/product/Keyestudio-EASY-Plug-RJ11-6P6C-Shield-V1-0-for-Micro-bit/1452162_33049967664.html?spm=2114.12010611.8148356.5.c4c06c0eetqfEU  ''' Shop on Aliexpress ''']


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[[category:Micro:bit]]