Raspberry Pi - I2C 16 channel 12-bit

PWM / Servo & SPI 23s17 x1 - 16 GPIO Board

  

Raspberry Pi - I2C 16 channel 12- bit PWM Servo & SPI 23s17 x1 - 16 GPIO Board

Serial Peripheral Interface (SPI)

 

  

                                                      

                                16 channel PWM Servo&   16 GPIO input/output with 16 Blue LED

The PCA9685 is an I2C-bus controlled 16-channel LED controller optimized for LCD
Red/Green/Blue/Amber (RGBA) color backlighting applications. Each LED output has its
own 12-bit resolution (4096 steps) fixed frequency individual PWM controller that operates
at a programmable frequency from a typical of 40 Hz to 1000 Hz with a duty cycle that is
adjustable from 0 % to 100 % to allow the LED to be set to a specific brightness value.
All outputs are set to the same PWM frequency.

PCA9685 also has a built-in oscillator for the PWM control.
However, the frequency used for PWM control in the PCA9685 is adjustable from
about 40 Hz to 1000 Hz as compared to the typical 97.6 kHz frequency of the
PCA9635. This allows the use of PCA9685 with external power supply controllers. All
bits are set at the same frequency.

The PCA9685 has 4096 steps (12-bit PWM)          

 

1. J3 Mini USB 5V input for PWM V+ & GPIO output pin 10 V+                                    

    J2 2P Terminal Block 5V input for PWM V+ & GPIO output pin 10 V+

2. J1 Rs-Pi V2  GPIO output

3 JP13  DA0 ~ DA7   U14 Port A    . JP14 BA0 ~ BA7     U14 Port B

4. R64,R65,R66 ( for  U14 Address select  A0,A1,A2)

5. U14 SPI 23s17 -1  Port A,B            23s17 Datasheet

6. U15  uln2803 

7. U3 PCA9685 (PWM Port 0 ~ 15)       PCA9685 Data Sheet 

8. R10,R11,R12,R13,R14,R15( for U3 Address select A0,A1,A2,A3,A4,A5)

     

 

                           plug in Raspberry Pi with Servo motor     

 

in i2cdetect  you can found 1 device in system (41)

 41 - 9685

 

 

our new output test program    23s17-1port-v100.py   display all 16 GPIO status

 

Support our Pi_Scratch software   Detail

(1) 23s17 16 GPIO control

 

 U1 to U4 spi 23s17  address 40,42,44,46 
 U1 to U2 spi 23s17  address 40,42 
 
 40 --> 1  42 --> 2  44 --> 3  46  --> 4
 48 --> 5  4a --> 6  4c --> 7  4e  --> 8
 
 Command "sp"+ "address(1-8)" + "a" +"bit(1 to 8)" for Port A
 Command "sp"+ "address(1-8)" + "b" +"bit(1 to 8)" for Port B
 Command "bits"+ "address(1-8)" + "a" +"bit(8 to 1)" for Port A
 Command "bits"+ "address(1-8)" + "b" +"bit(8 to 1)" for Port B
                                                                                                                                                        
  sp2b7 -->  spi address 2 Port B bit 7 ON/OFF
  sp3b4 -->  spi address 3 Port B bit 4 ON/OFF
  bits2b01010101 -->  address 2 port B from bit 8 to 11
                      output  --> 01010101                                                                                        
  bits2a01010101 -->  address 2 port A from bit 8 to 1
                      output  --> 01010101                                                                                                      
  bits2aoff  --> address 2 Port A all OFF/clear
  bits2aclr  --> address 2 Port A all OFF/clear

 

(2) Servo Motor control

 
 
 2 Servo in  channel 0 & channel 7 
 
   Command "SE"+ "PWM (0-15)" + "a" +"angle"  for Address 41
 
    se7a10   --> channel 7 servo move 10 angle  address 41
    se7a-10  --> channel 7 servo move -10 angle address 41
    se0a10   --> channel 0 servo move 10 angle  address 41
    se0a-10  --> channel 0 servo move -10 angle  address 41

 

(3) PWM  LED output demo

     

 

  
         LED module (Blue, Green,Yellow,Red)

 

LED Scrolling  Command     PWMLED41S0E15D4True
PWMLED”Address” S[Start channel] E[End channel] D[Delay / Timing] [True/False]
 
Address 41, 42,43,44 
Start channel & End channel   0 ~ 15    16 channel
D   1,2,3,4,5    (1 ~ 100) Delay Timing
 
LED Brightness control Command 
PWMLED “Address” “B” “0 ~ 1000“ 
PWMLED41B1000
 
Stop command 
"PWMLED41STOP"

 

 

 

Download sample program 

   23s17-1port-v100.py     n23s17-cs0.py            

  23s17-cs0.py     servo-40.py    servo-41.py    pwm

   pwm-v2  for Raspberry Pi V2 board             User manual

                  

Package Content

  1x Rs-Pi I2C 16 channel PWM &  SPI 23s17-1  16 GPIO board

1x manual 

  

 
 
 

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