Questions tagged [attiny85]
An Atmel 8-bit AVR microcontroller.
73
questions
0
votes
1answer
23 views
How to use attachInterrupt() in ATtiny85 with Arduino IDE?
It's possible use external interrupts/attachInterrupt() with the ATtiny85 when I program with Arduino IDE?
If is possible, how many inputs (for external interrupts) the ATtiny85 have and which are ...
0
votes
0answers
30 views
Send RAW IR code with ATtiny85
I am looking for a ATtiny85 send RAW IR code using a ATtiny85. I have it sending HEX code just fine, but just cannot find something for RAW. I have IRsend RAW IR running just fine on a NANO. Problem ...
0
votes
0answers
37 views
Table in in-line assembly code [closed]
I intend to use an ITtiny85 as a demodulator in a software-radio application. To reach the performance level, I need to write the inner loops in in-line assembly. One critical function is to obtain ...
0
votes
2answers
34 views
Why does my ATtiny85 blink program only work with 4 out of the 16 registers?
The following blink program runs fine on my Attiny85 SparkFun Tiny AVR programmer board. It produces 5 short blinks and then stops.
It also works fine when I change r16 to any one of the registers ...
0
votes
2answers
36 views
Convert float to char array on ATtiny85
I'm having a hard time trying to convert a float into a char array so it's stored like '7.125' just like the float looks.
I'm trying to communicate with an ATtiny85 (slave) and a program on a ...
-1
votes
1answer
56 views
Attiny85 simple analog and digital output problem
I'm just lighting up an LED through a TIP31C, pin 0 goes through a 560kohm resistor to the tip's input pin
pin 1 goes through a 750 ohm resistor to the tip's input pin
^i'm not sure this information ...
0
votes
1answer
42 views
Attiny85 PB4 works for analog output but not PB3?
I can get PB4 to work but not PB3 on my ATtinny85. I'm just lighting up an led (with 150 ohm resistor) (using internal 16mhz)
void setup() {
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
}
void loop()...
0
votes
1answer
231 views
Digispark ATtiny 85 erases flash after power loss
I have some issues with my Digispark ATtiny85 board.
If I upload the blink sketch for example the LED starts blinking and everything looks fine. But as soon as I unplug the Digispark from the USB ...
0
votes
2answers
128 views
Digispark Attiny85 draws more power for digital input than expected
I'm trying to figure out why my attiny85 (on a digistump developer board) draws around 3mA at 3V when setting up a pin as INPUT and connecting it straight to ground. The current is measured with a ...
0
votes
2answers
43 views
Attiny85, high output impedance, dim leds
I designed what I thought should be a very simple badge using the Attiny85 SU, schematic below:
The problem is the tiny doesn't seem to be sinking current properly. For testing I switched to a 20 PU ...
0
votes
1answer
43 views
Arduino IDE with ATtiny85 error “multiple definition of `__vector_5”
I am having a problem compiling the code for my ATtiny85 circuit.
I am using the timer/counter0 in normal mode so that when it overflows it triggers the TIMER0_OVF_vect ISR. When I have that ISR in ...
1
vote
1answer
70 views
Having trouble figuring out CTC on Timer 1 with ATTiny85
I'm using Timer1 on the Attiny85 clocked at 1MHz to toggle an LED every 1 second. However, I'm having some issues regarding prescaler and OSC value selection.
I'm using this formula, which I found in ...
1
vote
1answer
53 views
Receiving i2c bytes on an attiny85
I've been trying to write a small i2c lib in C over the past week. I managed to get writing to slaves working (for example I can write to an ssd1306 oled) but reading (for example date/time from an ...
0
votes
1answer
42 views
ATtiny167 Device not recognized
I'm frustrated I feel like I am 90% there but my computer will not recognize the ATtiny167. Here i9s the list of things I have completed/tried using Windows 10 and Arduino 1.8.6;
1) ...
0
votes
0answers
135 views
How to remove the 5 second boot delay on Digispark PRO (Attiny167)
I know there’s already a solution for removing the 5 seconds boot delay on Digispark (Attiny85), by writing a new bootloader someone already did to the Digispark. And to write code to it, you need to ...
0
votes
0answers
64 views
Attiny85: how to rotate the servo continuously with a press of a button?
I'm trying to use two Bluetooth commands in my code:
one is press off a button "1" the servo should do its routine without stop
second one press of the a button "2" servo should stop.
What am I ...
0
votes
2answers
67 views
How to program micro chips directly with USB
Is it possible to program chips like the Arduino uno's Atmega328P directly with USB serial from your computer?
Where can i find information on the protocols/standards to do such a thing?
More ...
1
vote
1answer
96 views
Using software Serial for Adafruit Thermal library and more general cpp question
I'm working on a proof of concept for using the Adafruit_Thermal printer library with an ATTiny85.
The ATTiny85 does not come with hardware serial capability, so I started looking into using ...
0
votes
0answers
22 views
How to adapt this code using a DF Mini Player and interrupts for the ATTiny85?
So I programmed my Arduino Mega 2560 to play certain sound effects from a DF Mini Player that I have. I took the base code that I modified from online so some fo the names might seem odd. Currently, ...
0
votes
2answers
441 views
DigiSpark AT Tiny85 compile problem?
Friend asked me to find problem with compilation for his DigiSpark AT Tiny85 board.
We are trying to compile sketch from here:
https://forum.arduino.cc/index.php?topic=314773.0
But with no luck - ...
0
votes
2answers
318 views
Two rpm counters with interrupts
Can I use two interrupts on to count rpm square signals coming from two hall effect sensor modules (that has built in comparators to generate square signals) ?
What if two signals come together ? ...
1
vote
2answers
133 views
Use ATTiny as a battery-backed RAM?
So, I found an interesting article the other day, and I'm trying to build a project that could benefit from a battery-backed memory (no wear limits, but keeps data over power cycling). The article ...
1
vote
2answers
409 views
How can I tell which fuses are set on an ATtiny?
Following on from this question, Problem with programming an ATtiny85: Error - avrdude: Yikes! Invalid device signature,
if the response from avrdude is 0x000000 then the internal oscillator is ...
1
vote
1answer
295 views
Digispark Micro (ATTINY85) not working on Macbook Pro 2016
I just bought 2 Digispark Micro to start learning some Arduino things.
But when I try to upload the code to my Digispark, it just send me an "Device search timed out" error.
My Digispark is plugged ...
0
votes
1answer
121 views
Measure small capacitances with ATtiny85 (Digispark board)
I have successfully run the code provided here on an Arduino Nano. If nothing is connected, it will output a very small capacitance (~ 1 pF).
Then I tried to migrate the code to the ATtiny85 (using ...
0
votes
2answers
797 views
Digispark ATtiny 85 - not recognised as HID device
I am trying to create auto-username-writer with Digispark ATtiny 85. I have a pretty simple sketch:
#include <DigiKeyboard.h>
void setup() {
}
void loop() {
DigiKeyboard....
0
votes
1answer
147 views
ATTiny85 I2C connection with Arduino Nano
I am trying to send and receive data using I2C between an Arduino Nano and an ATTiny85.
The ATTiny is mounted on this board:
Link
I've tried to reach the slave with the simple I2C scanner, but I don'...
2
votes
1answer
347 views
attiny85 reset itself instead of wakeup procedure
I have a digispark attiny85, and I am using SLEEP_MODE_PWR_DOWN to sleep, and wake-up with external interrupt on pin2. I am trying to count number of interrupts received with the code below.
Problem ...
0
votes
1answer
259 views
How to power multiple LEDs with a microcontroller [closed]
I currently have a "tiny" setup and want to put a few (~20-30) 0402 LEDs on a 1:87 scale car. My current setup is an ATtiny85 USB Mini Dev Board powered by a 90mAh 3.7V LiPo battery which is connected ...
1
vote
1answer
233 views
Powering a Tiny Arduino Project
I'm trying to build a tiny project. After I program the board, to power the dev board - how can I power it to run the code?
Question:
I was curious as to how I would be able to power the ATtiny85 ...
0
votes
1answer
116 views
Using Arduino as ISP and SoftwareSerial at the same time
I'm trying to use my Arduino Uno as an ISP to program an ATTiny85 and at the same time check my board by using the SoftwareSerial library to output the values I'm getting from my sensor.
Is this ...
0
votes
0answers
582 views
ATTiny85 arduino interrupt
i would like to know why my code running on the ATtiny85 1Mhz does not wake up after the interrupt.
I use the ATTiny Core.
#include <avr/sleep.h> // Sleep Modes https://www.nongnu.org/avr-...
3
votes
1answer
334 views
Flashing an ATtiny85 with a NodeMCU?
I recently purchased a Digispark for some of my smaller electronics projects. After it initially being a great little board, I soon found myself unable to flash the board in the same way I had done ...
1
vote
1answer
231 views
How to use -F option while Burn bootloader for ATtiny 85 using Arduino IDE
I'm very new to Arduino. I tried programming Attiny 85 module using Arduino as ISP. It worked fine few times. after that i'm getting below error.
Device signature = 0x000000
avrdude: Yikes! Invalid ...
0
votes
1answer
72 views
How long does it takes for arduino to reach main()?
I am trying to emulate the behavior of a circuit using an Attiny85
This is the result I got so far:
In the picture above, D2 is VCC, D4, D5 and D6 are outputs of the circuit I am trying to emulate. ...
0
votes
1answer
842 views
ATTINY85 with RGB LED
I'm trying to DIY about a dozen BlinkSticks (discontinued, Adafruit) pictured here
I'm thinking to use a Digispark ATTINY85 to control a single RGB LED to show the status of some program running ...
1
vote
1answer
972 views
Serial communication mac to Digispark ATtiny85
I want to use the Arduino IDE serial monitor with my Digispark ATtiny85 over USB.
I can without problems upload this code(Digispark CDC example):
#include <DigiCDC.h>
void setup() { ...
1
vote
1answer
125 views
Safely powering a relay from same source as attiny/arduino?
My project involves using ATTINY to control a 5v relay (specifically JZC-11F and will be ground triggered) in an automotive setting.
I keep seeing the warnings of powering a relay from the same ...
0
votes
0answers
193 views
Is this a good way of making a low power attiny? Unpower instead of sleeping
I am making a low power rf remote that just has 3 buttons and sends rf signals accordingly.
I've been trying to make pin interrupts work when it's in deep sleep but it's a huge hassle. And then I ...
0
votes
3answers
153 views
Digital Comparator with ATTiny85 doesn't behave as expected
Here is my schematic:
I've removed the resistors from the LEDs to make it smaller.
The 1 and 2 on the left are outputs from the arduino (which supplies the VCC and ground).
These 1 and 2 are HIGH or ...
0
votes
0answers
56 views
Arduino button trigger coding
I am trying to write a simple coding to change the color of an RGB LED using a push button trigger. I just need the the pin output to change when the button is pressed. I would like to do this using ...
0
votes
1answer
444 views
Can I program a 20MHz Attiny85 with the 8MHz Internal Clock option in the Arduino Software?
I'm looking at using the ATTiny85 for a project, but have run into a snag. After following the tutorial found at https://learn.sparkfun.com/tutorials/tiny-avr-programmer-hookup-guide, I've installed ...
0
votes
1answer
116 views
Attiny85 route vcc though output pin
I'm still learning the basics so please bare with me if something seems unclear ;-)
I want to hook up an Attiny85 to a WiFi module (esp8266) and 2 sensors. The VCC will be provided by a battery pack ...
2
votes
2answers
1k views
Attiny85 appears to be drawing 0.2mA current but battery running down more quickly
I am trying to get a temperature sensor (tmp36) working with an Attiny and if possible I would like it to run for several weeks. I have tried to power down the Attiny and it appears to be drawing only ...
-1
votes
1answer
99 views
Adadfruit Trinket software not running on ATtiny85
I have an application that uses a pair of nRF24L01+ as a simple RF link between a camera PC sync output and a set of LED flashes. The important factors are power and low latency - hence the 2.4GHz.
I ...
0
votes
2answers
617 views
Attiny85 not able to understand data from 433Mhz using VirtualWire.h
The basic plan is to have a Attiny85 pass information from a 433Mhz RF module to another chip/Arduino via I2C using VirtualWire and Wire libraries. I have been able to make this system work on their ...
1
vote
2answers
122 views
Sending over a number from Arduino to Attiny85 [closed]
I recently started my first arduino project, displaying a number on a 4x 7 segment display. I want to keep this code and use the display in other projects to display 4 digit numbers (creating a ...
1
vote
2answers
515 views
ATtiny85 serial communication, bootloader and setting up fuses
I have been reading some articles about ATtiny and how to burn the bootloader. And I have two questions which I can't figure out.
Do I need to manually setup fuses to run 8 MHz on my ATtiny when I'm ...
1
vote
1answer
870 views
Always 255-response in I2C between ATTiny85 (8MHz) and Arduino Uno
I tried to set up an I2C conversation between ab ATTiny85 (8MHz) and an Arduino Uno. However I always get a 255 response from my I2C slave. I am using Arduino 1.8.5.
What am I doing wrong?
ATTiny85-...
1
vote
1answer
2k views
PWM output while using I2C with the ATTiny library
I've noticed that when using the USI interface on the ATTiny to send I2C via the methods from "Wire.h" with the ATTiny Arduino implementation included from the library manager (ATTinyCore), while ...
