ATtiny Programmer Board (ArduinoUNO As ISP)

Additional information and document update here on my site:

https://www.mischianti.org/2019/08/02/attiny-progr...

ATtiny13/ATtiny13a/ATtiny25/ATtiny45/ATtiny85

I really like the ATtiny and programming it, so I built a simple board to use Arduino UNO as ISP in a faster way.

With the original Arduino UNO, there is a little variant because compatible one have another 5v VCC over RESET pin, Arduino UNO has IOREF instead, but don't worry look at the schema to make the simple change.

In github project you can find the fritzing file with simple examples and schema.

Other solution is to export this board and send it to https://www.pcbgogo.com?code=y .

I use a perfored board.

To switch Voltage (to use 3.3v or 5v) and to enable test LED, I use a smd on/off button instead of a pin with a jumper.

The board is double sided so I can attach pin and components up and down the board.

AmountPart TypeProperties

• 1 Arduino Uno (Rev3) tipo Arduino UNO (Rev3)
• 1 Electrolytic Capacitor capacitance 10µF
• 1 Ceramic Capacitor capacitance 100 nF
• 1 IC Holder pin spacing 300mil; pins 8
• 1 Green LED package 3 mm [THT]; colore Green (570nm); leg yes
• 1 Yellow LED package 3 mm [THT]; colore Yellow (595nm); leg yes
• 1 10kΩ Resistor resistenza 10kΩ; tolerance ±5%
• 2 220Ω Resistor resistenza 220Ω; tolerance ±5%
• Generic male header package THT; form ♂ (male); hole size 1.0mm,0.508mm; pin spacing 0.1in (2.54mm); pins 8; row single
• Generic female header package THT; form ♀ (female); hole size 1.0mm,0.508mm; pin spacing 0.1in (2.54mm); pins 4; row single

I buy ATtiny13a very low cost IC (less than 0.5€), with 4 analog pin and 2 PWM/TIMER PIN.

First version of board with no led indicators.

This version work only with fake Arduino.

Fritzing here.

As you can see for Original Arduino uno you must add a wire to give 5v voltage to switch.

Fritzing here.

Add green led to control if board have power supply.

Fritzing here.

I add a very usefully test led, to check if all is connected correctly.

Fritzing here.

ATtiny can work at various voltage so I insert a jumper to select ATtiny operating voltage 3v or 5v power supply.

To test if It's all ok on board I add a test led that can be activated by that jumper.

To prevent reset when upload code It's important to add a capacitor to reset pin of Arduino.

Other important thing is the capacitor to stabilize the voltage and pullup resistor to reset pin of ATtiny.

The realization is quite simple and the result is very usefully.

Mount board on Arduino.

1. In Arduino IDE select ArduinoUNO board (Tool --> Board --> ArduinoUNO - Strumenti --> Scheda --> ArduinoUNO);
2. Than open ArduinoISP example file (File --> Examples/Esempi --> 11.ArduinoISP --> ArduinoISP);
3. Upload Arduino (Sketch --> Upload/Carica);
4. Close IDE.

GitHub ATtiny13 support

1. Open the Arduino IDE;
2. Open the File > Preferences menu item;
3. Enter the following URL in Additional Boards Manager URLs: https://mcudude.github.io/MicroCore/package_MCUdu... ;
4. Open the Tools > Board > Boards Manager... menu item;
5. Wait for the platform indexes to finish downloading;
6. Scroll down until you see the MicroCore entry and click on it;
7. Click Install;
8. After installation is complete close the Boards Manager window.

GitHub other ATtiny support

1. Open the Arduino IDE;
2. Open the File > Preferences menu item;
3. Enter the following URL in Additional Boards Manager URLs: https://raw.githubusercontent.com/damellis/attiny... ;
4. Open the Tools > Board > Boards Manager... menu item;
5. Wait for the platform indexes to finish downloading;
6. Scroll down until you see the MicroCore entry and click on it;
7. Click Install;
8. After installation is complete close the Boards Manager window.

1. Attach board to ArduinoUNO;
2. Insert ATtinyXX;
3. If the board is v03 than activate test led otherwise using a breadboard and take VCC from upper right pin of attiny and GND to down left pin, than connect 0 pin (down right) to a led (on next video);
4. Select board with correct setting and PORT (Tools --> Board/Strumenti --> Scheda);
5. Select Arduino as ISP (Tools --> Programmer --> Arduino as ISP/Strumenti --> Programmatore --> Arduino as ISP);note: Arduino as ISP is different from ArduinoISP.
6. Upload program (Sketch --> Upload from programmer / Schetch --> Carica tramite un programmatore).

If the board is v03 than activate test led otherwise using a breadboard and take VCC from upper right pin of attiny and GND to down left pin, than connect 0 pin (down right) to a led (on video).

A simple scketch to upload to ATtiny

#define PIN 0
void setup()
{
  pinMode(PIN, OUTPUT);
}

void loop()
{
  digitalWrite(PIN, LOW);
  delay(500);
  digitalWrite(PIN, HIGH);
  delay(500);
}

In github project you can find some additional info and schema.