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which pins are used for PWM ?

@copilot which pins are used for PWM ?
1y
For the Raspberry Pi on your project, the pins that can be used for PWM are:
On the ATMEGA328PB-AU (U1), the following pins are typically used for PWM:
You can refer to these pins for configuring PWM on your Raspberry Pi and ATMEGA328PB-AU within your project.
1y
which pins can I use for digital output ?

@copilot which pins can I use for digital output ?
1y
On your Raspberry Pi, you can use any of the GPIO pins for digital output. These pins include RPi1:GPIO2 through RPi1:GPIO27. The table below outlines the available options:

Table


GPIO PinNamePin Number
GPIO2SDA3
GPIO3SCL5
GPIO4GCLK07
GPIO14TXD8
GPIO15RXD10
GPIO17GPIO1711
GPIO18PWM012
GPIO27GPIO2713
GPIO22GPIO2215
GPIO23GPIO2316
GPIO24GPIO2418
GPIO25GPIO2522
GPIO5GCLK129
GPIO6GCLK231
GPIO12PWM032
GPIO13PWM133
GPIO19MISO135
GPIO16GPIO1636
GPIO26GPIO2637
GPIO20MOSI138
GPIO21SCLK140
If you're asking about the ATMEGA328PB microcontroller (U1), almost all pins can be configured as digital input/output. Here are the pin numbers for the ATMEGA328PB you can use as digital output:

Table


Pin NumberName
1PD3
2PD4
3PE0
6PE1
7PB6
8PB7
9PD5
10PD6
11PD7
12PB0
13PB1
14PB2
15PB3
16PB4
17PB5
19PE2
22PE3
23PC0
24PC1
25PC2
26PC3
27PC4
28PC5
29PC6
30PD0
31PD1
32PD2
Let me know if you need any specific pins for a certain circuit or interface!
1y
3
https://techfun.sk/produkt/akcelerometer-gyroskop-mpu6500-6dof/

7
which pins on raspberry pi can be used for analog output ?

@copilot which pins on raspberry pi can be used for analog output ?
1y
The Raspberry Pi (models 2, 3, 4, and 400) does not have built-in analog output pins. However, you can use Pulse Width Modulation (PWM) to create an analog-like output using the GPIO pins. The common GPIO pins used for PWM on a Raspberry Pi are:
  • GPIO12 (PWM0)
  • GPIO13 (PWM1)
  • GPIO18 (PWM0)
  • GPIO19 (PWM1)
You can use these pins to generate PWM signals that can be filtered to create an analog output.
Let me know if you need any help integrating PWM into your schematic.
1y
4
when connecting. atmega to L293D to input and enable pins should I put there pul...

@copilot when connecting. atmega to L293D to input and enable pins should I put there pulldown resistor. as well so when it is not active it is pulled down ?
1y
Yes, you can use pull-down resistors on the input and enable pins of the L293DD to ensure they do not float when not driven. This helps to prevent any unintended operation of the motor driver. Typically, a resistor value in the range of 10kΩ is used for pull-down resistors.
Here's how you can connect them:
  1. For U2 (L293DD):
    • Connect a 10kΩ resistor between U2:INPUT_1 and GND (Connect $R4$:P1 to U2:INPUT_1 and $R4$:P2 to GND).
    • Connect a 10kΩ resistor between U2:INPUT_2 and GND (Connect $R5$:P1 to U2:INPUT_2 and $R5$:P2 to GND).
    • Connect a 10kΩ resistor between U2:ENABLE_1 and GND (Connect $R6$:P1 to U2:ENABLE_1 and $R6$:P2 to GND).
    • Connect a 10kΩ resistor between U2:INPUT_3 and GND (Connect $R7$:P1 to U2:INPUT_3 and $R7$:P2 to GND).
    • Connect a 10kΩ resistor between U2:INPUT_4 and GND (Connect $R8$:P1 to U2:INPUT_4 and $R8$:P2 to GND).
    • Connect a 10kΩ resistor between U2:ENABLE_2 and GND (Connect $R9$:P1 to U2:ENABLE_2 and $R9$:P2 to GND).
  2. For U3 (L293DD):
    • Connect a 10kΩ resistor between U3:INPUT_1 and GND (Connect $R10$:P1 to U3:INPUT_1 and $R10$:P2 to GND).
    • Connect a 10kΩ resistor between U3:INPUT_2 and GND (Connect $R11$:P1 to U3:INPUT_2 and $R11$:P2 to GND).
    • Connect a 10kΩ resistor between U3:ENABLE_1 and GND (Connect $R12$:P1 to U3:ENABLE_1 and $R12$:P2 to GND).
    • Connect a 10kΩ resistor between U3:INPUT_3 and GND (Connect $R13$:P1 to U3:INPUT_3 and $R13$:P2 to GND).
    • Connect a 10kΩ resistor between U3:INPUT_4 and GND (Connect $R14$:P1 to U3:INPUT_4 and $R14$:P2 to GND).
    • Connect a 10kΩ resistor between U3:ENABLE_2 and GND (Connect $R15$:P1 to U3:ENABLE_2 and $R15$:P2 to GND).
Does this make sense for your setup?
1y
8
https://www.elektrolab.eu/blog/atmega328p-zapojenie-pinov-prehlad-puzdier-a-popi...

1
I need to control this RGB led using Raspberry pi, which pins should I use?

@copilot Resistors before LED should be on which side?
1y
When connecting an LED in a circuit, a current-limiting resistor is typically placed in series with the LED to prevent it from drawing too much current and burning out. This resistor can be placed on either side of the LED (before or after) as long as it's in series with the LED.
Here's a brief explanation:
  1. Resistor before the LED (Anode side):
    • Connect the resistor to the positive voltage supply.
    • Connect the other end of the resistor to the anode (positive side) of the LED.
    • Connect the cathode (negative side) of the LED to the ground.
  2. Resistor after the LED (Cathode side):
    • Connect the anode (positive side) of the LED to the positive voltage supply.
    • Connect the cathode (negative side) of the LED to one end of the resistor.
    • Connect the other end of the resistor to the ground.
In both configurations, the current flowing through the LED will be the same, as will the voltage drop across the LED and resistor. Let's see how this would apply to your specific design:
Let's assume we are dealing with D1D1 (LTST-G563ZEGBW) and R1R1 (500 (\Omega)).
For the resistor before the LED:
  • Connect R1:1R1:1 to the output pin driving the LED.
  • Connect R1:2R1:2 to D1:GD1:G.
For the resistor after the LED:
  • Connect D1:GD1:G to the output pin driving the LED.
  • Connect D1:KD1:K to R1:1R1:1.
  • Connect R1:2R1:2 to ground.
Both configurations will limit the current through the LED and ensure it operates safely.
1y
Resistors before LED should be on which side?
1y
@copilot I need to control this RGB led using Raspberry pi, which pins should I use?
1y
To control the RGB LED ($D1$) using the Raspberry Pi, you will typically use GPIO pins configured for PWM (Pulse Width Modulation) to control the intensity of the Red, Green, and Blue components. Here's how you can connect the LED to the Raspberry Pi GPIO pins:
  1. Red LED Control: Connect the $D1:G$ pin to a GPIO pin on the Raspberry Pi.
  2. Green LED Control: Connect the $D1:R$ pin to another GPIO pin on the Raspberry Pi.
  3. Blue LED Control: Connect the $D1:B$ pin to yet another GPIO pin on the Raspberry Pi.
  4. Ground Connection: Ensure the common ground ($D1:GND$) of the RGB LED is connected to a GND pin on the Raspberry Pi.
Here are specific GPIO suggestions:
  • Red LED: Connect $D1:G$ to $RPi1:GPIO17$ (Pin 11 on the GPIO header).
  • Green LED: Connect $D1:R$ to $RPi1:GPIO27$ (Pin 13 on the GPIO header).
  • Blue LED: Connect $D1:B$ to $RPi1:GPIO22$ (Pin 15 on the GPIO header).
  • Ground: Connect $D1:GND$ to $RPi1:GND$ (Pin 6 on the GPIO header).
Here’s the detailed connection list:
  • Connect $D1:G$ to $RPi1:GPIO17$.
  • Connect $D1:R$ to $RPi1:GPIO27$.
  • Connect $D1:B$ to $RPi1:GPIO22$.
  • Connect $D1:GND$ to $RPi1:GND$.
Let me know if you need further assistance with PWM configuration in software!
1y
I cannot use PWM pins because I need them to control servos, what else can I use? or do I need some additional component to be able to control colors on rgb led?
1y
If you need to control the RGB LED without using the Raspberry Pi's PWM pins because they are reserved for servos, you could use a dedicated PWM driver IC or module. One popular choice is the PCA9685 PWM driver, which can control 16 individual channels and is commonly used in hobby projects for servos and LEDs.
Using PCA9685 PWM Driver Components Needed:
  1. PCA9685 PWM driver module
  2. RGB LED (D1D1)
  3. Raspberry Pi (RPi1RPi1)
Connections:
  1. PCA9685 to Raspberry Pi
    • Connect PCA9685:VCCPCA9685:VCC to RPi1:3V3RPi1:3V3 (Pin 1).
    • Connect PCA9685:GNDPCA9685:GND to RPi1:GNDRPi1:GND (Pin 6).
    • Connect PCA9685:SCLPCA9685:SCL to RPi1:SCL/GPIO3RPi1:SCL/GPIO3 (Pin 5).
    • Connect PCA9685:SDAPCA9685:SDA to RPi1:SDA/GPIO2RPi1:SDA/GPIO2 (Pin 3).
  2. RGB LED to PCA9685
    • Connect D1:GD1:G to a PWM output pin on PCA9685PCA9685 (e.g., Channel 0).
    • Connect D1:RD1:R to another PWM output pin on PCA9685PCA9685 (e.g., Channel 1).
    • Connect D1:BD1:B to a third PWM output pin on PCA9685PCA9685 (e.g., Channel 2).
    • Connect D1:GNDD1:GND to PCA9685:GNDPCA9685:GND.
Detailed Connection List:
  • Connect PCA9685:VCCPCA9685:VCC to RPi1:3V3RPi1:3V3.
  • Connect PCA9685:GNDPCA9685:GND to RPi1:GNDRPi1:GND.
  • Connect PCA9685:SCLPCA9685:SCL to RPi1:SCL/GPIO3RPi1:SCL/GPIO3.
  • Connect PCA9685:SDAPCA9685:SDA to RPi1:SDA/GPIO2RPi1:SDA/GPIO2.
  • Connect D1:GD1:G to PCA9685:Channel0PCA9685:Channel 0.
  • Connect D1:RD1:R to PCA9685:Channel1PCA9685:Channel 1.
  • Connect D1:BD1:B to PCA9685:Channel2PCA9685:Channel 2.
  • Connect D1:GNDD1:GND to PCA9685:GNDPCA9685:GND.
Software Configuration:
  1. Install the necessary library for the PCA9685:

    Bash


    sudo pip install adafruit-circuitpython-pca9685
  2. Example Python Code to Control the RGB LED:

    Python


    import board
    import busio
    from adafruit_pca9685 import PCA9685
    from adafruit_bus_device.i2c_device import I2CDevice
    
    # Initialize I2C bus.
    i2c = busio.I2C(board.SCL, board.SDA)
    
    # Create the PCA9685 object.
    pca = PCA9685(i2c)
    pca.frequency = 60
    
    # Define the channel for each LED color.
    led_red = pca.channels[0]
    led_green = pca.channels[1]
    led_blue = pca.channels[2]
    
    # Function to set the color.
    def set_color(red, green, blue):
        led_red.duty_cycle = red
        led_green.duty_cycle = green
        led_blue.duty_cycle = blue
    
    # Example use: Setting the color to purple.
    set_color(0xFFFF, 0x0000, 0xFFFF)
By using the PCA9685 module, you can control your RGB LED without tying up your PWM GPIO pins on the Raspberry Pi. This method also allows more precise control over the LED brightness and provides additional PWM channels for other projects.
1y
can i use some other PWM driver with less outputs? I need only 3 for RGB led
1y
Certainly! If you need fewer PWM outputs, you can use a simpler and smaller PWM driver like the TLC59711 by Texas Instruments, which provides 12 channels of 16-bit PWM control. While 12 channels might still feel like overkill, the TLC59711 is commonly used for RGB LED control and offers high PWM resolution.
Using TLC59711 PWM Driver Components Needed:
  1. TLC59711 PWM driver module
  2. RGB LED ($D1$)
  3. Raspberry Pi ($RPi1$)
Connections:
  1. TLC59711 to Raspberry Pi
    • Connect $TLC59711:\text{Vin}$ to $RPi1:3V3$ (Pin 1).
    • Connect $TLC59711:\text{GND}$ to $RPi1:\text{GND}$ (Pin 6).
    • Connect $TLC59711:\text{SCL}$ to $RPi1:\text{SCL/GPIO3}$ (Pin 5).
    • Connect $TLC59711:\text{SDA}$ to $RPi1:\text{SDA/GPIO2}$ (Pin 3).
  2. RGB LED to TLC59711
    • Connect $D1:\text{G}$ to an appropriate PWM output pin on $TLC59711$ (e.g., OUT0).
    • Connect $D1:\text{R}$ to another PWM output pin on $TLC59711$ (e.g., OUT1).
    • Connect $D1:\text{B}$ to another PWM output pin on $TLC59711$ (e.g., OUT2).
    • Connect $D1:\text{GND}$ to common ground.
Detailed Connection List:
  • Connect $TLC59711:\text{Vin}$ to $RPi1:3V3$.
  • Connect $TLC59711:\text{GND}$ to $RPi1:\text{GND}$.
  • Connect $TLC59711:\text{SCL}$ to $RPi1:\text{SCL/GPIO3}$.
  • Connect $TLC59711:\text{SDA}$ to $RPi1:\text{SDA/GPIO2}$.
  • Connect $D1:\text{G}$ to $TLC59711:\text{OUT0}$.
  • Connect $D1:\text{R}$ to $TLC59711:\text{OUT1}$.
  • Connect $D1:\text{B}$ to $TLC59711:\text{OUT2}$.
  • Connect $D1:\text{GND}$ to $TLC59711:\text{GND}$.
Software Configuration:
  1. Install the library for TLC59711 (Adafruit CircuitPython TLC59711 library):

    Bash


    sudo pip install adafruit-circuitpython-tlc59711
  2. Example Python Code to Control the RGB LED:

    Python


    import board
    import busio
    import adafruit_tlc59711
    
    # Initialize SPI bus (SCLK and MOSI pins).
    spi = busio.SPI(board.SCL, board.SDA)
    
    # Create the TLC59711 object.
    tlc59711 = adafruit_tlc59711.TLC59711(spi)
    
    # Function to set the color.
    def set_color(red, green, blue):
        tlc59711[0] = (red, green, blue)  # Channel order R, G, B for first LED
        tlc59711.write()
    
    # Example use: Setting the color to purple.
    set_color(65535, 0, 65535)
Using the TLC59711, you can control the RGB LED without using multiple GPIO/PWM pins on the Raspberry Pi, maintaining high precision and making your design more compact. This driver can be easily interfaced, and it should fit well with your requirements.
1y
6
U2
+5V
CH2_UART_RXD_TO_TXD_FROM_RPI
U3
+5V
X1
CH1_UART_TXD_TO_RXD_FROM_RPI
R5
Resistance
10k Ω
U1
R7
Resistance
10k Ω
R4
Resistance
10k Ω
R6
Resistance
10k Ω
D1
RPi1
SPI PROGRAMMER
C1
Capacitance
Capacitance
C2
Capacitance
Capacitance


  • Ground
    A common return path for electric current. Commonly known as ground.
  • Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
  • Power Net Portal
    Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
  • Generic Resistor
    A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
  • Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
  • Generic Inductor
    A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
  • RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
  • 875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
  • CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink

Inspect

RPI HAT BP

RPI HAT BP
Description

Created
Last updated by andrejvysny
1 Contributor(s)
andrejvysny

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