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Atmega in car
The argument regarding something happening to the avr and doing something to the car isn't negated by using an optocoupler - what happens if the optocoupler circuit fails? The...
Friday, 7 January 2005 - 12:14
external oscillator needed for 16MHz operation AT90CAN128?
I have a quick look at the prelim datasheet - what gives you the impression that you can't use a 16MHz crystal? This device looks like a atmega128 with CAN - no probs using a...
Friday, 7 January 2005 - 11:54
serial storage memory for datalogger
Atmel have what they call 'dataflash' which is serially accessed and there is also MMC cards that are easy to interface. These use flash technologies so there is a write endurance...
Friday, 7 January 2005 - 11:49
Frequency Input with ATmega32
firstly -what are the range of frequencies you want to measure and how accurately do you want to measure them? Remember - QUALIFY AND QUANTIFY whenever asking a question. I think...
Friday, 7 January 2005 - 11:42
Migrating from PIC to AVR?
Quote:The problem is that those chips are still not made for embedded system. They need 1.8 and 3.3 Volt and can't handle 9bit communication very well. The speed is very...
Thursday, 6 January 2005 - 08:17
bit averaging algorithm
As Bob suggested, use a error correcting code which would be a more economical way of coping with the errors. Do a google on 'golay'. The general method of comms is to minimise...
Tuesday, 4 January 2005 - 02:57
RF communication with AVRs?
Protocols like Bluetooth are normally implemented in a chip that does the protocol AND the RF side. Therefore your interface to these devices is via serial (RS232 etc) - there are...
Monday, 3 January 2005 - 03:14
Both negative and positive voltage. How???
I think you'll find the -15 volts is for the lcd bias. So all you need is to provide this -15 volts - the logic interface to the lcd is still 5v levels.
Monday, 3 January 2005 - 02:55