Questions tagged [adafruit]

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Transmit a LoRa trace using B210

I am trying to use a USRP b210 in order to transmit a LoRa trace and receive it using a LoRa node device. For the setup, I am using Adafruit Feather M0 with RFM95 as the lora nodes. I have been using ...
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4 votes
3 answers
483 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 ...
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3 answers
56 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 ...
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1 vote
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94 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%...
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4 votes
1 answer
164 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 ...
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25 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 ...
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3 votes
1 answer
207 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: ...
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2 answers
75 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 ...
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0 answers
77 views

ATSAMD21 (arduino) is pulling ports low when calling wire.onRequest()

The intent: Using the controller and I2C for turning a port high and low and querying for data from an agent. The setup: Two Adafruit Itsybitsy M0 Express (ATSAMD21) connected via I2C, 4k7 pullups on ...
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68 views

How to use Adafruit's LTC4311 I2C Extender module?

I am trying to extend the I2C distance of the sensor to RPI and Arduino UNO. Here are the details of my hobby project: I am using RPI as the Master and it is giving I2C instruction to the slave ...
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-1 votes
1 answer
55 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, ...
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200 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). ...
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1 answer
52 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 ...
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1 vote
2 answers
80 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 ...
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1 answer
160 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 ...
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-1 votes
3 answers
91 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'...
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27 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 ...
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0 answers
131 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 ...
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1 vote
0 answers
170 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 ...
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1 answer
119 views

Please help identify the positive and ground for BLE antenna

Please help identify the positive and ground for adding an external BLE antenna, after the chip antenna was removed. I am connecting an external antenna (not the removed one) to this Nrf51822 BLE ...
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1 answer
34 views

What is the bluetooth library for Adafruit CLUE? Does one exist to download?

I couldn't find any information on Adafruit CLUE's bluetooth library or even examples of code. Could someone tell me if Adafruit CLUE even has a bluetooth library and where I can find it?
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2 votes
3 answers
536 views

Some basic questions about an accelerometer's unexpected behavior while tilted

I have an ADXL335 accelerometer connected to my Arduino. Here is some code that I am running based off a tutorial: ...
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1 answer
233 views

Which pins of ATSAMD51 are used for I2C in Adafruit Grand Central?

I am trying to recycle my old Adafruit Grand Central board to use with Atmel Studio.I Adafruit website , I2C pins ( SDA , SCL ) are marked as PB20 and PB21 to be used as SERCOM-3 but in ADSAMD51 ...
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1 vote
0 answers
325 views

How to choose the right ferrite bead for an LDO

I'm trying to design a custom board that will include the FGPMMOPA6H GPS. Looking at the Adafruit integration of this GPS, I can see a ferrite bead on the output of the LDO (MIC5225-3.3). See below: ...
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0 votes
1 answer
275 views

How to use LBO on Powerboost 1000C as input for Arduino

I am using a project which uses an Arduino Uno and a powerboost 1000C. in the manual it says, LBO - not a leveraged buy out! this is the Low Battery Output. By default it is pulled high to BAT but ...
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1 vote
1 answer
742 views

SSD1306 128x32 OLED Initialization problem

I'm trying to run the SSD1306 128x32 on a NUCLEO board. But I can't get the thing to properly initialize. This is my initialization sequence. ''' ...
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0 votes
2 answers
95 views

Transferring Circuit to Solderable Mini Breadboard [closed]

I have a simple wifi temp/humidity sensor I've set up on an adafruit breadboard, and I'd like to transfer to a perma-proto type board, but the solderable boards I have are a slightly different layout ...
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6 votes
3 answers
3k views

Can breakout board still be used if the pad gets ripped out?

In a desoldering incident, my beautiful board ended up like this: Other side: The guy doing the desoldering says there is no chance this board is usable since he claims he ripped through the ...
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2 votes
1 answer
6k views

Adafruit SSD1306 Scrolling Function

So, there is a function in the Adafruit SSD1306 Library that prints a scrolling text. For examples, display.startscrollright(0x00,0x0F); will print a text scrolling towards the right. What are the ...
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1 answer
163 views

Driving an Adafruit motor shield and a bluetooth module with Arduino Uno

I am creating a simple 4 wheel robot (BO Motors 200 RPM) with Adafruit Motor Shield and Arduino Uno V3. I am trying to use a Bluetooth module to control the robot. However, unlike Mega, I do not have ...
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