Questions tagged [attiny85]

An Atmel 8-bit AVR microcontroller.

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1answer
392 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 ...
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1answer
567 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 ...
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1answer
239 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 ...
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865 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-...
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1answer
765 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 ...
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1answer
385 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 ...
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1answer
94 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. ...
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1answer
1k 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 ...
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1answer
1k 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() { ...
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1answer
183 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 ...
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0answers
292 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 ...
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3answers
209 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 ...
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0answers
119 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 ...
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1answer
627 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 ...
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1answer
192 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 ...
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2answers
2k 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 ...
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1answer
111 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 ...
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2answers
796 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 ...
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2answers
155 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 ...
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2answers
668 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 ...
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1answer
1k 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-...
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1answer
3k 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 ...
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2answers
7k views

I2C libraries for ATTiny85?

I want to transmit I2C data, using a Digispark ATTiny85 board: http://digistump.com/products/1 http://digistump.com/wiki/digispark/tutorials/connecting I've found the following I2C libraries. Which ...
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2k views

Digispark ATtiny85 keyboard

I have a small project that I have in mind and I'm pretty new with Arduino. I want to make a small device that if a key was pressed it would do something. Now I know I could use a button with the ...
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0answers
634 views

ATtiny85 and MPU-6050 Gyroscope

I'm doing a project that involves sending MPU-6050 gyroscope data via serial communication to the laptop. Is ATtiny85 micro-controller suitable for this job? Is it powerful enough to do it? I was ...
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3answers
5k views

ATTiny85 Digispark clones failing USB handshake - how to program them?

I've recently bought a batch of ATTiny85 modules (Digispark clones) from China, and tried to write a first test program into them now. I noticed that they do seem to have some bootloader already ...
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1answer
150 views

How can I modify Arduino code to work with ATtiny85?

Push a tactile switch to cycle through several different patterns on the LED strips. I want to modify the Arduino code so that I can use the ATtiny85 instead. *****The code posted here works on the ...
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1answer
757 views

ATTiny85 Serial communication with Bluetooth Module

For a simple project I would like to use a ATTiny85 connected to a HC-06 Bluetooth Module so it can talk to my Android phone. I wrote a code for my Arduino Uno and worked as expected. When I changed ...
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1answer
2k views

FastLED: “Invalid pin specified”

I have an Adafruit Trinket (5v, 16mhz, based off of the AtTiny85 chip), and am wishing to use it with a strip with 24 3 pin, individually addressable LEDs (WS2812B). When I try to compile my code, I ...
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1answer
969 views

ATtiny85 MIDI IN using SoftwareSerial - Is it possible?

I'm trying to read MIDI notes using an ATtiny85 via SoftwareSerial; so far, I've got no success at all. The ATtiny is using the internal clock, 8Mhz, 5V. The MIDI keyboard sends clean note on/off ...
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1answer
2k views

I2C requesting more then one byte

I got an Arduino Uno set up as an I2C master to an ATtiny85 slave, using the Wire (Master) and TinyWireS (Slave) libraries. Communication works good. I have been able to keep the network running ...
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1answer
164 views

Arduino Yún as ISP to program Attiny - why is the sketch not working after successful upload?

I want to use an Arduino Yun as ISP to program an Attiny85. I have soldered a shield following the circuit that is depicted in many sites. You can see it in this page. I have included a LED with a 1k ...
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1answer
783 views

Arduino <<I2C>> ATtiny85 stops updating variables after a while

I've been working on a project for the last few days and spent a LOT of time googling, reading and testing. I'm kinda running out of ideas now and instead of bumping my head to the wall I thought ...
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2answers
4k views

i2c wire length

I have some problems with i2c. I can not use long wires on SDA and SCK bus. This seems to be the consequence of the capacity between the SDA and SCK wires and not between SDA/SCK and GND. I figured ...
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1answer
3k views

Programming a servo on an ATtiny85

Board: "ATtiny25/45/85" Processor: "ATtiny85" Clock: "Internal 1 MHz" Programmer: "Arduino as ISP" I want to run a servo forwards and backwards on an ATtiny85. The servo library is not compatible ...
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1answer
390 views

Simulate V1838B IR LED output

I have a HDMI switcher which uses a TL1338 IR LED that's connected via a 3.5mm audio jack. It has its own remote for switching between the inputs, but I want to use my TV remote. In order to do that ...
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2answers
2k views

I2C from two masters (ATtiny85, ESP8266) to one slave (ATmega328)

I've been working on a project with I2C protocol where an ATmega328 (Arduino) configured as slave, receives messages from an ATtiny (ATtiny85, ATTinyCore by SpenceKonde) configured as master, or from ...
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1answer
539 views

Attiny85 - Method to discard glitched ADC values?

I have a problem i need to solve so i will simply it as much as possible. Basically there is a system with a micro-controller where it reads 2 sensors. These 2 sensors are of variable resistance type,...
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1answer
1k views

Trying to flash ATTiny85 bootloader using FT232R in the Arduino IDE

I have a FT232R that I want to use to flash my ATTiny85 bootloader in the Arduino IDE, can someone help me out on this? I don't want to get a AVR programmer.
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3answers
411 views

analogRead() hangs [closed]

With this code I try to send a measurement over 443MHz using RadioHead. All parts work but when combined they fail. This chip used is an ATtiny85. The function 'measure' torpedoes the entire program. ...
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5answers
11k views

Digispark Serial Port Communication

I am using Digispark ATTiny85 and i need to send and receive data through the serial port of my computer. Does anyone have an idea as to how do i proceed with sending STRINGS and NUMBERS through the ...
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2answers
499 views

ATtiny85 soft-latching, and sensor-waking: Are multiple switches differentiable by pin change interrupt?

I am using a vibration switch with a pin change interrupt on an ATTiny85 to wake the processor and run some code when the vibration switch grounds an input pin. The circuit is battery-powered, so ...
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1answer
828 views

AtTiny44 and AtTiny 85 communication

I'm working on a project where I use two microcontrollers: an AtTiny44 (20MHz ext clock) and an AtTiny85 (8MHz internal). What I'm trying to achieve is an I2C communication between the 85 and the 44, ...
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1answer
333 views

Servo only going one direction till it reach limit

I have a ATTiny85 with a standard servo motor attached to it. I would expect the following sketch to make the servo to oscillate between position 60 and 100 but instead it just to to it's limit (180) ...

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