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I2C Write Function and Making the Array User Inputtable with Python

I'm wrapping up the firmware for my project using 4 TCA9548As to switch between 32 different ports for I2C slave devices. I have a raspberry pi and clamp on master SDA and SCL lines for master input. ...
Beau Raley's user avatar
-1 votes
0 answers
28 views

How to read position sensor values more accurately for stpper control?

I am using Feather M4 express development board with DC Motor + Stepper FeatherWing and Ethernet FeatherWing stacked on it. The idea is to read the target position from the UDP from 0 t0 360 degrees ...
dreamcoder's user avatar
2 votes
2 answers
56 views

Can MUXs or their channels be sperate busses?

I am doing a little project with some MUXs. PCB is currently being built; I'm waiting for it to be shipped out to me. I have multiple MUXs on my board (TCA9548As). They are connected to a master pair ...
Beau Raley's user avatar
0 votes
0 answers
84 views

TCA9548A I2C Python coding help

I am designing a board using 4 TCA9548As that each have 8 screw terminals so that I can connect to 32 addressable devices. I am trying to create the python code to be able to write to each of these ...
Beau Raley's user avatar
0 votes
0 answers
43 views

Change analogWrite() frequency using the arduino framework for SAMD51

I am using Adafruit Feather M4 Express board which has Atmel SAMD51 controller on it. I am using platformio as IDE, which lets me use this controller using the Arduino framework. I want to change the ...
dreamcoder's user avatar
1 vote
1 answer
46 views

Driving stepper motor with higher voltage

I have a DC Motor + Stepper FeatherWing and I am trying to drive a ST2018S0604-C stepper motor. The motor is rated at 3.9V and the specification of the motor driver TB6612 on the FeatherWing board ...
dreamcoder's user avatar
0 votes
2 answers
42 views

I2C Level Shifting (Adafruit breakouts)

I have programmed an I2C slave on an Arduino Nano and an I2C master was on an Arduino Mega. I'm now working on upgrading the master to a Teensy 4.1. The new master is a 3.3v microcontroller, where as ...
Hubert B's user avatar
1 vote
1 answer
44 views

Adafruit Feather M4 CAN Express overvoltage protection

I would like to read CAN signals from my car over the OBD-II connector. My question is, whether I need to implement any kind of (overvoltage) protection, so the Adafruit won't get harmed (and vica ...
Zsolt's user avatar
  • 11
1 vote
1 answer
43 views

Can a shift register be used to drive LEDs that need to be pulled down to light up?

In my limited experience I have only used RGB LEDs that have a common anode connected to ground and then are lit up by pulling up on the pin connected to the LED colour pins. I currently have 3 ...
EwneoN's user avatar
  • 13
0 votes
2 answers
84 views

Arduino SPI and analog pin management

I am using Adafruit Feather M4 Express to read buttons, switches, encoders and potentiometers and control some LEDs of a control panel. I am running into issues with the pin management. I have 5 ...
dreamcoder's user avatar
0 votes
1 answer
36 views

Where do I see the pin functions?

I got this usb² to i²C board: https://www.adafruit.com/product/2264 and I wonder where I can see any information about what the pins D0-D7 or C0-C9 mean, actually also even the same about GND and 3V, ...
Ben's user avatar
  • 625
0 votes
2 answers
40 views

Debugging I2C Read

I'm running code from [Adafruit_BuxIO] (https://github.com/adafruit/Adafruit_BusIO) which defines the function `write_then_read' as ...
Seth Shill's user avatar
0 votes
1 answer
95 views

JST to mini USB- Is it possible, how would this work?

Rather than using a mini USB cable to charge the NANO V3.0 Development Board - Clone Compatible Model, I want to use a lithium ion battery pack. Like this one here. How would I connect the two? Would ...
Alexandros Eghoyan's user avatar
0 votes
0 answers
22 views

How to connect a solenoid to the Adafruit Feather M0 Bluefruit LE

How would I connect the to the Adafruit Feather M0 Bluefruit LE to this Mini Push-Pull Solenoid - 5V so that I can via bluetooth send over instructions to the microcontroller to control the solenoid?
Alexandros Eghoyan's user avatar
0 votes
1 answer
30 views

L293D motor driver resistor network confusion

I've been trying to modify the original Adafruit V1 L293D motor driver, but have run into a bit of a roadblock when reading its schematic. The text labelling the resistor network has stacked and ...
poxyping's user avatar
1 vote
0 answers
56 views

Animating 3600 neopixels with RPi is slow

I have SPI RGB led strip with three wires connection: – TX1818 driver (manufacturer says “it’s compatible with TM1812, UCS1903, SM16703, WS2811–2815”) – 12V, 9.3 W/m, 5060, 60/metre – 3600 pixels, 60 ...
asvetly's user avatar
  • 111
0 votes
0 answers
184 views

What is the purpose of "IO38_DBLTAP" on this ESP32-S3-MINI dev board?

I was examining the Adafruit ESP32-S3-TFT feather board and saw this IO38_DBLTAP section (bottom right of image). It looks like a pulldown resistor and a decoupling capacitor, but I'm confused as to ...
edward wang's user avatar
2 votes
5 answers
152 views

Why do MCU dev boards include multiple voltage regulators?

I was examining the Adafruit ESP32-S3 feather board and noticed that it contains 2 voltage regulators. It appears that one is used for powering the MCU itself, and the other is for powering I2C ...
edward wang's user avatar
0 votes
2 answers
59 views

How to write to a write to ADS1015 through TCA9548A connected to I2C multiplexor and trying to talk to a analog to digital multiplexor?

I am using a Raspberry Pi Zero 2 to talk through a TCA9548A to multiple ADS1015, each ADS1015 is on a separate SDA/SCL channel of the TCA9548A. I am able to scan all channels and see the active ...
user avatar
0 votes
1 answer
326 views

Adafruit BNO055 orientation sensor

My sensor is a BNO055 Absolute Orientation Sensor. I wanted to see if the sensor is ready or not. I tried to run it using different libraries, but it never worked. I couldn't understand why. Then I ...
LOODAN's user avatar
  • 1
0 votes
0 answers
302 views

How to troubleshoot a potentiometer problem

I went over my league and started the Adafruit's PiGrrl Zero project, and then when succeeded, wanted to implement the audio amplifier add-on suggestions. Anyways, this morning, the audio amp's ...
Myoch's user avatar
  • 101
0 votes
1 answer
226 views

NotImplementedError: in FeatherS3 - ESP32-S3 Adafruit (BLE HID)

I am trying to upload a BLE HID code to FeatherS3 - ESP32-S3 Adafruit and get a NotImplementedError. I have no idea how to proceed forward. Please help me on this. This code works perfectly on a NRF52 ...
Wedahitha Yapa's user avatar
2 votes
1 answer
174 views

Why does MPC4725 DAC output in range 0-3.3V when VREF is 5V?

I am trying to produce a 0-5V variable output from a Raspberry Pi using: adafruit MCP4725 DAC breakout (https://www.adafruit.com/product/935) SparkFun PCA9306 level translator breakout (https://www....
user2075343's user avatar
0 votes
0 answers
166 views

How to get EDID code for Adafruit TFP401 HDMI/DVI Decoder to support 640x480 display

I'm a Flight simmer building my own Airbus A320 home-cockpit (call it a 10-year project). I'm currently building the MCDU (Multi-Function Control and Display Unit). This needs an LCD of roughly 5.6&...
Hans Billiet's user avatar
1 vote
1 answer
273 views

How to add power switch to Adafruit Feather32?

I have an Adafruit HUZZAH32 ESP32 board, a battery and an on/off switch. I'd like to connect them in such a way that all of the following are satisfied: Switch turns the board on/off Board is powered ...
NoMachine's user avatar
0 votes
1 answer
107 views

Trigger button press after button hold released

I am currently planning a circuit around an Adafruit Sound FX. I want to use it in a costuming prop, but use the main button to trigger different sounds (without them being randomized). It should also ...
DaveMitHut's user avatar
1 vote
1 answer
89 views

Charging a power bank with a solar panel

Is there either a simple circuit that I could build, or a good circuit/pre-made board that will charge up a 6700mAh/5V/2A power bank with a small solar panel that is attached to the cover of an ...
Jimib's user avatar
  • 23
1 vote
0 answers
160 views

TCA9548a + TCS34725 + Arduino MEGA not identifying the sensors

I'm trying to use the arduino mega with a TCA9548A multiplexer and two color sensors, but I'm not able to connect the arduino with the two sensors. When I try to scan the TCA9548A it returns that ...
Matheus Markies's user avatar
0 votes
0 answers
77 views

How to determine which I2C commands to execute to arrive at a desired result?

I have successfully established bidirectional communication between a featherS2 board and a Mikroe UART to I2C bridge. I do this by instantiating the address of an I2C command from page 16 of this ...
Z-Man Jones's user avatar
2 votes
1 answer
709 views

How to properly use i2c.writeto_then_readfrom() method

See also follow-up question about i2c addresses I have this mikroe board wired up to an S2 Feather via the SDA and SCL pins. The ...
Z-Man Jones's user avatar
6 votes
3 answers
2k views

Why am I detecting two I2C addresses on the same board, and why do neither of them appear in the datasheet?

I have this MIKROE board wired up to an S2 Feather via the SDA and SCL pins. The MIKROE board is powered by the Feather via <...
Z-Man Jones's user avatar
0 votes
0 answers
148 views

Adafruit ST-Link STM8/STM32 v2 can't connect to STM32F091

I've an Adafruit ST-Link STM8/STM32 v2 which I need to connect to an STM32F091. The MCU is powered from an external source and I have correctly connected the SWCLK and SWDIO as well as GND and 3.3V. ...
NicoCaldo's user avatar
  • 315
3 votes
1 answer
648 views

Safely measuring high-side current using Adafruit INA219

I've been thinking about monitoring the power draw within my solar-based chicken coop setup to get a better understanding of the true power consumption for estimating battery life. I have a 12 V deep ...
Drise's user avatar
  • 133
5 votes
2 answers
976 views

What is this component? What is its purpose?

What is this component? I don't how to search for it. It has only "4 4" written on it; I didn't get any search results from it. Does anyone know what this SMD component is, and what it is ...
Just doin Gods work's user avatar
4 votes
3 answers
1k views

Can someone help me understand this code for the ADXL345 accelerometer?

I'm trying to learn how to read the angles measured from an ADXL345 accelerometer (Adafruit) for a beginner project where the sensor will be attached to a short stick and I want to read the angles I'm ...
user avatar
0 votes
3 answers
175 views

How do I know what voltage logic board I'm using (Arduino Uno and accelerometer)?

I've recently purchased an accelerometer (Adafruit ADXL345: https://thepihut.com/products/adafruit-adxl345-triple-axis-accelerometer-2g-4g-8g-16g-w-i2c-spi), and I'm working on connecting it up before ...
user avatar
1 vote
0 answers
118 views

Help with Wemos D1 project!

I am trying to make my first arduino simple project based on the directions of this video for a gift to my fiancee [youtube]https://www.youtube.com/watch?v=duiAbLsXZSE&t=309s&ab_channel=Breaks%...
Orchestral Dreams's user avatar
4 votes
1 answer
196 views

Noob questions about my accelerometer (ADXL345) and Arduino components in general

I've just bought this accelerometer: https://www.amazon.co.uk/XTVTX-ADXL345-Digital-Acceleration-Gravity/dp/B09NRFDH5J/ref=cm_cr_arp_d_pl_foot_top?ie=UTF8 I've bought it to learn about accelerometers ...
user avatar
0 votes
0 answers
93 views

Adafruit Feather reading analog data incorrectly

I have some dead simple code for reading the x and y analog values from my Arduino joystick module. It works fine on my Arduino Mega 2560, but Adafruit Feather nRF52832 reads the analog signal ...
Jeff Chen's user avatar
  • 111
3 votes
1 answer
3k views

I2C Connection with ADS1115 not working

I have trouble by setting up an I2C connection between ESP32 NodeMCU and ADS1115 (datasheet). Wiring: I'm using the below example code from Adafruit: ...
michaelgr22's user avatar
0 votes
2 answers
680 views

Making a 5 V to 4.2 (or 3.7) V output converter with an output current of 500 mA?

I currently have a 5 V source that outputs a nominal current of 1.5 A. I want to be able to convert it to 4.2 V or 3.7 V with a current of 500 mA to power a Adafruit HUZZAH32 - ESP32 Feather, which ...
Beetle's user avatar
  • 9
-1 votes
1 answer
144 views

I2C voltage levels and inter-operability with Sparkfun Boards

I'm trying to design around Sparkfun's I2C products to work with Adafruit sensors, specifically Sparkfun's I2C Multiplexer, Differential Endpoint, and Differential Midpoint. From what it looks like, ...
BestQualityVacuum's user avatar
0 votes
0 answers
717 views

Circuit to drive 8 IGBT gate drivers using 2 PWM pins on Arduino

I am using digital pins 9 and 10 to generate a 10kHz PWM on Arduino Uno. So, I got 2 PWMs. But I need to drive 8 IGBT gate drivers using these 2 PWMs (4 IGBTs using PWM1 and other 4 IGBTs using PWM2). ...
Ruhi's user avatar
  • 13
0 votes
1 answer
71 views

What determines the load output voltage of this Adafruit solar charger?

I am looking at this board from Adafruit. It seems like it could work in my project, but I have some concerns about the maximum load output voltage. My understanding of this board is that I can ...
Obedear's user avatar
  • 11
1 vote
2 answers
170 views

What is the purpose of these logic level enhancement mosfets in this schematic? [duplicate]

Below I've included a schematic that belongs to a adafruit light sensor, the VEML7700. The output of the light sensor is fed into the source of a mosfet which seems to always be ON since the gate is ...
Ricky Hernandez's user avatar
0 votes
1 answer
315 views

Programming the Feather 328p/ ATMega 328p

I have an Adafruit Feather 328P, which claims to be 'Arduino Compatible'. I believe I have set up my Arduino IDE correctly (according to the Adafruit link), but whenever I try to upload to the board I ...
Snappawapa's user avatar
-1 votes
3 answers
190 views

UART CTS/RTS vs Data Format

I'm working on a project which involves a Texas Instruments DSP microprocessor communicating with an Adafruit BLE Friend UART device. The UART device has a 9600 Baud data mode, but the datasheet doesn'...
numerousobjective7's user avatar
0 votes
0 answers
29 views

Data from my IoT node isn't displayed

I have a LoRa module called Adafruit Feather M0. I tried programming with Arduino in order to eventually display data. The data doesn't show up. What I've done is that I've registered my LoRa device ...
Eric Dahl's user avatar
  • 161
0 votes
0 answers
220 views

Bridge Local Mosquitto MQTT broker installed on RPi with cloud MQTT broker

I was trying creating a bridge between the cloud broker (io.adafruit) and mosquitto broker which runs on my Raspberry Pi. I have successfully tested the local mqtt connection whereas connecting to a ...
Rahul S Saksule's user avatar
1 vote
0 answers
392 views

Wake up with external Interrupt from deep sleep mode (Adafruit Feather 32u4)

I have an Adafruit Feather ATMega 32u4. I want to put it into sleep mode and wake it up with pressing a switch as an external interrupt. This is what I tried so far and which worked: switching a LED ...
Larsi's user avatar
  • 11