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31  Using Arduino / Microcontrollers / Re: Atmega 168 And ATmega8 on Arduino UNO on: March 27, 2014, 02:16:50 am
Hi,

I have heard of people removing the ATMega from the Uno and doing this (for example this instructable) but you could likely skip a step (ie the wiring) by putting the bootloaded uC you want to program in the slot on the Uno to upload to it.

If you want to keep using the bootloader, buy an FTDI breakout board to program your projects without the Uno ongoing.  Nick Gammon's excellent page gives a step-by-step guide to how to use that with a breadboard after programming the bootloader with the Uno.

Cheers !
Geoff
32  Community / Exhibition / Gallery / Re: CodeWire, a range optimized version of VirtualWire on: March 21, 2014, 05:51:29 pm
Thank you for sharing this upgrade. Do you have any test data on the improvements gained, especially at the edge of range?  How far are you able to space these now inside your home?

Geoff
33  Community / Exhibition / Gallery / Re: Reptile Enclosure Controller on: March 18, 2014, 04:23:30 pm
Hi,

Yes I agree.  I admit this had fallen off the back of the priority list but once a few more items are cleared out of the way I might take a tilt at this.  We have a heating pad under one end of the enclosure as well as an iR lamp  but having them both on is overkill, especially granted she's a bluetongue and they're native around here so our winter conditions suit just fine.  The only reason we went with that initially was to prevent hibernation, but last winter we just let that happen and we'll probably continue to do that now.

Cheers ! Geoff
34  Community / Exhibition / Gallery / Re: Reptile Enclosure Controller on: March 14, 2014, 06:32:48 pm
Thanks for sharing your experiences.  I had considered upgrading our enclosure.  Though we don't have a basking species, temperature and perhaps water level monitoring would be sensible and potentially save us some power too.

I'll be watching for your updates with interest on this one.

Cheers ! Geoff
35  Using Arduino / Microcontrollers / Re: Atmega 328 @8Mhz voltage? on: March 06, 2014, 03:54:09 am
I came on pages 8Mhz/3,3V from Sparkfun and other companies.
Hi Dylan

I think that's more to dissuade you from trying 16MHz or even 20MHz at 3.3V, though I understand that can often work fine.  Section 28.3 of the ATMega328 datasheet shows the recommended frequency range versus voltage with the recommendation not to exceed 10MHz below 2.7V.  Based on that graph 8MHz will be fine for supply voltages from somewhere below 2.7V up to 5.5V. 

I've used 8MHz for circuits which are 3V coin-cell powered, or for reducing the power consumption of 5V projects, and for anytime where speed isn't so important but I could do without the extra components on the board (ie on my lazy days).

Cheers !
Geoff
36  Using Arduino / Microcontrollers / Re: Arduino Pro Mini - LCD shows garbage on: March 06, 2014, 03:34:47 am
Sometimes there is some very simple error that can drive us nuts and then we find the problem and say "wow, what a stupid mistake I made."
+1 to that!

You can never overestimate the benefit of walking away, taking a break and coming back with a hot coffee and a fresh perspective.

Cood luck!
Geoff
37  Community / Exhibition / Gallery / Re: Electromagnetic Accelerator on: February 21, 2014, 05:31:41 pm
That's unique and really very clever - thanks so much for sharing it here.

Geoff
38  Using Arduino / Microcontrollers / Re: Using Vusb on an Attiny 85 with the Arduino IDE on: February 21, 2014, 05:28:47 pm
I'm pretty sure DigiSpark uses VUSB and is certainly ATTiny85 based.  I've not looked into it too deeply but you may find a hint you need in the Micronucleus bootloader.  Be sure to check and adhere to their license terms if you do however.

Cheers ! Geoff
39  Using Arduino / Microcontrollers / Re: aurdino programming.......... need help on: February 21, 2014, 05:19:27 pm
hey friends..
i got my problem solved  smiley
What was the problem and the solution in the end?
40  Using Arduino / Microcontrollers / Re: ATtiny2313 as usb to serial on: February 20, 2014, 04:18:01 am
Do you mean something like Arduino-Tiny?  Others are also linked from that page.

Cheers ! Geoff
41  Using Arduino / Microcontrollers / Re: How interchangeable are arduino uno pins? on: February 19, 2014, 07:08:13 am
Hi,

It turns out you're in luck and there's only one pin you need to define differently. 

These are the hardware SPI pins (link to wikipedia entry for SPI) for the Arduino.  This is a serial protocol that has 3 lines common to all SPI devices, and a unique SS pin for each SPI device on the bus.

While the two you are using default to the same SS pins, from the comments of one of the example
Code:
// By default the SPI-SS line used is D10 on Atmega328.
You can change it by calling .SetCS(pin) where pin can be {8,9,10}
So that library includes a method of defining the SS line to something other than D10 to allow that module co-exist nicely with other SPI devices.

Cheers !
Geoff
42  Using Arduino / Microcontrollers / Re: STM32 discovery +Arduino Bootloader on: February 17, 2014, 08:10:58 am
Hi,

The Arduino bootloader is very specific to the underlying (often but not always Atmel) microprocessor so you're not going to be able to use that direclty.

Having said that, if you google "STM32 Arduino IDE" you'll find a couple of projects where an Arduino-like IDE has been made to suite STM32.

Cheers !
Geoff
43  Using Arduino / Microcontrollers / Re: aurdino programming.......... need help on: February 15, 2014, 07:35:20 pm
Wow now these threads are all merged this reads very confused.

Please post your code as it currently is, inside CODE tags (the # button gives you these) so we can see where you're up to now.
44  Using Arduino / Microcontrollers / Re: aurdino programming.......... need help on: February 15, 2014, 07:41:13 am
At what point does this code set the value to 0x62 ?
45  Using Arduino / Microcontrollers / Re: aurdino programming.......... need help on: February 15, 2014, 06:01:55 am
could you help me in serially interfacing aurdino with cc1101??
Give it a go yourself, and when you get stuck, put the details in the forum and you'll often find people who can help.

All the best with your project,
Geoff
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