6
votes
Accepted
Pin headers too long for the sensor i bought
Cut one pin off.
Get some wire cutters and position them in the groove between the last and next to last pins in the row. Squeeze. One pin will pop off.
- 106k
5
votes
Accepted
How to measure resistance of TFT Touchscreen
As pointed out in other answers and comments, step one was trying to get a datasheet for this component. I couldn't find a datasheet for the shield, but here is the link from the vendor I bought it ...
- 326
5
votes
Accepted
Schematic for the adafruit motor shield v2.3
Everything can be found out by reading the schematic which, incidentally, is the first hit on Google when you search for "Adafruit motor shield 2.3 schematic":
What are the pin holes above and ...
- 106k
5
votes
Accepted
How to use capactive touch on Adafruit board in Arduino mode?
Example code for capacitive touch on Trinket M0. Note: make sure to install the Adafruit FreeTouch library.
// touch - Capacitive touch demo using FreeTouch. Trinket M0 version.
// Note: the pin ...
- 166
5
votes
Accepted
What is the difference between SCLK and CLK pins?
"CLK" stands for "CLocK". "S" stands for "Serial". So "SCLK" is "Serial CLocK". You also get "SCL" (often used for I2C) and "...
- 106k
4
votes
Why are my motors attached to an Arduino MEGA not running?
As you did not give details I assume the following:
You supply the MEGA via USB or external 5-12V power supply
the motors are supplied via an extra external 12V power supply with sufficiant amperage
...
- 1,331
3
votes
Accepted
Press on pressure sensor, then wait 5 seconds, turn on LED
The basic concept for tracking timing in the loop() is as follows:
1) when your event occurs, you store the current time in a variable:
unsigned long lastReading = 0;
uint8_t waiting = false;
if ( ...
- 1,139
3
votes
Arduino Shield on Breadboard
Chances are the offset headers won't allow the shield to directly plug into a breadboard.
As @Majenko noted, shields have a header that is offset by 0.16" from the other headers. Since a breadboard ...
- 1,139
3
votes
5pt font for Neopixel shield
I was having the same problem until I read the library source code. Later I found the documentation reference.
The classic font cursor position is defined as the top-left corner of the character cell....
- 31
3
votes
Accepted
Fingerprint sensor code won't work correctly with LCD 16x2
You have pins 2 and 3 used by both the LCD and the SoftwareSerial used for the fingerprint sensor.
Use different pins for one or the other.
Worth looking at the Software Serial reference to ...
- 2,181
3
votes
Accepted
Undervoltage from solar panels
You have selected a number of things that don't go well together. It is possible to use relays or mosfets to switch between batteries, and the Arduino could be used to measure a voltage. Or you can ...
- 3,246
3
votes
Accepted
Burning the Bootloader on Adafruit Feather 32u4
"Burn Bootloader" only works if you have a programmer connected to the device. The onboard bootloader in your Feather cannot change the fuses, even though the process may indicate it has done so.
You ...
- 6,974
3
votes
Accepted
how to send data to Adafruit Bluefruit Feather (32u4) over bluetooth?
The “UART” being referred to is the Nordic UART GATT Service. This is not a serial port or USB connection. It is a high level BLE protocol that simulates a serial port via the Bluetooth connection.
...
- 332
3
votes
Accepted
add ID number to the feather m0 bootloader (flash)
This is quite an easy fix, actually.
The problem here is the compiler doesn't think the const is used for anything - so it (quite rightly) throws it away.
All you need to do is tell the compiler ...
- 106k
3
votes
Accepted
Increase sample rate in ESP32 board
Here's a few tips on optimization.
for(int index = 0; index <= framesRead; index++)
{
value = smappioSound.getSampleValue(index);
if(index % 2 == 0)
{
...
- 3,646
3
votes
Arduino Switching Between Loops IR Remote
delay(0) apparently[*] acts like delay(2^32) or about 10^10 milliseconds. That may not be what you had in mind ... :)
Try reducing the delay to 1 or use delayMicroseconds() to get something shorter. ...
- 15.3k
3
votes
Accepted
How we can implement the interrupt?
There is no interrupt for the select button.
The buttons, and the LCD itself, are connected to an I2C IO expander. Reading the state of the buttons is a polling operation - the library sends a ...
- 106k
3
votes
Is My Motor Shield Broken?
As noted by markshancock, you are using an older version of the Adrafruit Motor Shield library meant for the version 1 of the board (you have the version 2.3), and according to their forum they are ...
- 193
3
votes
Accepted
ESP32 Pins won't fit in solderless breadboard
I ended up taking Gerben's suggestion from the comments and ordering the stacking headers (adafruit.com/product/2830) and plugging the ESP32 into that. The reason it works is because the stacking ...
- 181
3
votes
Is there an Adafruit function to invert the colors of my screen for Arduino language?
There is a function that invert the colors of your screen, you can pick either black on white or white on black, I have tried it and I have quite experience with your display, I think you should try ...
- 216
3
votes
Accepted
Is it possible to use Adafruit's Circuit Playground Express's 2MB storage in Arduino IDE?
In their guided tour of the Adafruit Circuit Playground Express, it specifically states:
You can use this in Arduino or CircuitPython to store files.
So yes, it is possible. As far as the how, ...
- 310
3
votes
Adafruit Thermal Printer unwanted gradient
Thermal printers generate quick pulses of heat to change thermal paper from white to a darker color. This may require more than the expected amount of current most Arduino project need.
Consider ...
- 7,470
3
votes
Can this display's address be changed?
There are two different OLED screens in the links you shared.
1. OLED Display on Adafruit Link
The OLED display on the Adafruit link does not have an address as it communicates via the SPI interface.
...
- 131
3
votes
Accepted
Why is the Adafruit splashscreen logo not displayed properly?
I'm unable to test this now, but here goes:
Turns out I did have the ability to test it (found an extra display module) and this does indeed explain the problem. The only other change I needed to make ...
- 5,414
3
votes
Reading & writing a configuration file on an Adafruit Circuit Playground Express
The problem was using the Arduino SAMD board core instead of the Adafruit SAMD board core. The Adafruit SAMD board core is not visible unless you add:
https://adafruit.github.io/arduino-board-index/...
- 41
3
votes
Accepted
What are these 18 extra ports on the adafruit-gfx 2.8"
Those are an alternative way of connecting to the screen. Basically they mirror the connections to the "shield" pins.
To save costs the manufacturer will have made a PCB that can be used in ...
- 106k
3
votes
Will an Arduino Nano work instead of Teensy 3.2?
No, you can't use Adruino Nano, because in this project the Teensy board has been used as an USB Keayboard and Nano has separate communication chip (FTDI or CH430) that can't emulate USB keyboard.
...
- 4,777
2
votes
Using MMA8451 accelerometer to count steps
Change your if statement - remove ; (semicolon) from the end.
Use this:
if (event.acceleration.x >= 5)
accum = accum + 1;
Notice there is no semicolon after if statement
- 158
2
votes
Accepted
What boards have integrated USB charging?
The Feather mainboards are fairly small and have integrated LiPo/Li-ion charging. They're not as small at the Trinket but if you don't need the space on the proto boards then you can examine the ...
- 17.7k
Only top scored, non community-wiki answers of a minimum length are eligible