intro

1.1 brian in ohio

1.2 out from under my rock

motivation

2.1 ken fallon bootloader episode

hpr 2660

burned many bootloaders

used usbtiny programmer

putting together a programmer would be a good learning experience

2.2 still use arduino

easy to check out a new piece of hardware

boards are cheap and easy to find

boards are robust

2.3 need to run an arduino board at lower frequency

developing a data logger

write code in c using the avr open source tool chain

prototype on arduino board

needed supplies

3.1 arduino ide

get from your distro’s repository

slackbuilds i used the version that repackages the binaries, the little a arduino

read this good information

https://www.arduino.cc/en/Tutorial/ArduinoISP

3.2 avrdude

use it to test the programmer outside of the arduino environment

part of the gnu avr toolchain

3.3 arduino nano clone - un assembled

look for the boards that have the unpoplated icsp header

make sure its a nano and not a pro-mini

3.4 3 leds 3mm or smaller

optional but are useful, especially the heartbeat led

3.5 3 resistors 200 ohm - small

if you install the led’s

3.6 1 5-10 uF electrolytic capacitor

3.7 3-4 inch long jumper wire

3.8 2x3 female header

3.9 some way to cut wire

3.10 soldering supplies

howto

4.1 upload arduino isp sketch to nano

File→Examples→11.ArduinoISP→ArduinoISP

i modified the sketch changing where the led’s are placed

i put the led’s at digital 9, 7, and 5 for spacing

#define RESET 10 // Use pin 10 to reset the target rather than SS

#define LED_HB 9 // No change define LED_ERR 7 // changed define

#LED_PMODE 5 // changed

upload the sketch

4.2 solder on led’s

solder the anode leg to the apropriate digital pin on the board

add a resistor to the cathode leg of the led (usually the shorter leg)

solder the resistor attached to the cathode to ground pin of the board

i started with pin 9

you can test each led before moving on to the next led

my soldering ended up messy but it gets the job done

4.3 modify sketch and test leds

you can modify the sketch

change the heartbeat pin to whatever led you just soldered

upload the modified sketch

the led you just soldered should pulse

4.4 clip jumper wire and attach

pin 10

used the hole on the end of the board as strain relief

4.5 add capacitor

watch polarity

no more auto reset

if you want to program with arduino ide, you need to push the reset button