Comments on: Prototype: Hackable LED Christmas card & ornament

By: Rob

Rob — Thu, 04 Mar 2010 05:37:22 +0000

re: avrdude: initialization failed, rc=-2

Hi I got the same error… I fixed it when I realized that MOSI and MISO were plugged in the wrong way around.

By: Ian

Ian — Tue, 02 Feb 2010 07:32:38 +0000

I believe the AVR DUDE implementation is currently too fast for the ATINY13. I’m not 100% sure of that, but I recall someone recently mentioned it.

You might try with the SKT500v2 clone firmware for the BUs Pirate, that’s what I used to develop the firmware.

By: ecronin

ecronin — Tue, 02 Feb 2010 02:42:39 +0000

OK, starting to think I fried the MC somehow, unless I need to desolder something before doing ISP:

./avrdude -C avrdude.conf -p t13 -c buspirate -P /dev/tty.usbserial-PirateV3

Detecting BusPirate…
**
** Bus Pirate v3
** Firmware v4.1 Bootloader v4.1
** DEVID:0×0447 REVID:0×3043 (B5)
** http://dangerousprototypes.com
**
BusPirate: using BINARY mode
avrdude: initialization failed, rc=-2
Double check connections and try again, or use -F to override
this check.

By: ecronin

ecronin — Tue, 02 Feb 2010 01:34:57 +0000

debug question:

I finally soldered up my kit of this and the LEDs work, but there’s no fading/blinking/going to sleep action happening. I’m assuming the AVR comes programmed? If that is indeed the case any ideas where a solder bridge or something could be causing the PWM not to happen?

By: Ian

Ian — Tue, 05 Jan 2010 07:41:21 +0000

@Michael – I’m sorry about that, I sent two versions to Seeed, maybe they got mixed up. Was R2 1K? That’s a more appropriate value, but I reduced it to 390ohms in my final design to keep the part count lower. If you have the resistor values, I’ll post an update with the correct partlist.

By: Michael Pechner

Michael Pechner — Mon, 04 Jan 2010 20:29:32 +0000

On the 2 kits I received from seeed studio, R2 was a different value all together.
R3-R12 are different from the schematic.

Easy to figure out. R1 is as advertised.
R2 is the other single resister.
The rest are for R3-R12.

Yes, cr-2032 battery does work. That is waht I had laying around.

By: Ian

Ian — Sat, 28 Nov 2009 08:13:12 +0000

@RobotGrrl – You should be able to use any ‘common’ through-hole LEDs in this circuit. ‘Common’ meaning ~2volts forward voltage, <20mA current draw, such as 3mm and 5mm through-hole LEDs.

By: RobotGrrl

RobotGrrl — Fri, 27 Nov 2009 19:31:18 +0000

If we didn’t want to use SMD LEDs, what through-hole LEDs would we use? (Assuming that the PCB doesn’t matter…)

By: Ian

Ian — Tue, 17 Nov 2009 19:48:20 +0000

I love the Ice Tube (cube?) clock kit! :)

By: IPenguin

IPenguin — Tue, 17 Nov 2009 19:33:00 +0000

Nice little … pre-Christmas surprise. :)

Good to know that the PCB color will be red … leaves the option to paint the tree green :D

For the kits … I can see my kids doing some SMD soldering instead of helping to prepare the Christmas tree. :D

And hey, what’s going on there between Lady Ada and Ian? o.O

Don’t you like her “Ice Cube Clock Kit”? ^^