john banks

Anyone know of anything like the above ready built in a small box to save me the hassle - I am more interested in the application rather than constructing something. Small keypad - say up/down/left/right/enter, plus 12V car supply capability would be nice. I suspect it doesn't exist and I'd have to just build it

ADCs, DACs and PWM(s) plus ability to program in BASIC with floating point capability.... dream on?

Otherwise it is an ATMega8 and the soldering iron.

Mr.M

John,

Have you looked at the ITX boards available from VIA. Very cheap. Obviously you would need a ADC capture card.

Me and a work collegue are looking in to building something for cheap in-car entertainment system with them i.e. DVD / GPS / MP3 / eMAIL etc.

Puff The Magic Wagon!

iTrader: (2)

John

Try PCB - he's into all that sort of stuff

john banks

Thanks Gents. I like the Atmel AVR micros because they're easy and I have all the stuff for them. A PC would be a bit heavier with all the PSU/bootup and extra cards but a nice idea.

All I want to do is build a DIY version of the HKS VPC, so a micro is ideal.

David_Wallis

VPC??

Amtel and a board looks like your choice..

How many inputs / outputs do you want?

Assume you are using external drivers..

Very interested as I have some plans

David

john banks

Vein Pressure Converter.

MAP sensor, RPM signal and charge temperature thermocouple.

Sort the offsets to get real values, multiply them all together, scale to simulated MAF input and throw out the PWM signal through an RC network. Throw away MAF sensor

So I need 2 channel ADC, one timer for measuring RPM, one for PWM.

Used the AVR 90S4433 before and like it, would do the job. Thought it would be nice to have something to go rather than have to build it.

David_Wallis

what about something such as http://www.dontronics.com/dt006.html

think its very similar to what andrew is using..

David

john banks

I used the RaVeR for my EBC previously with BASCOM AVR. Very easy to use and the free BASCOM goes quite a long way, would certainly do this project. What are you thinking of building? Solenoid control for gas turbine ?

David_Wallis

Dont laugh.. but amongst other considerations... Also looking at freeing up some outputs off the ecu.. I was reading up last night though and it looks like I may be able to use the four spare injector outputs...

Can Also have exhaust gas pressure sensor as well as turbo tacho inputs.. No egt input though

john banks

Nice.

dsmith

I've been looking for somethng similair recently for another project. BasicX do module including the following....

High quality 4 x 20 Backlit Super Twist LCD Display
8 10-Bit Analog to Digital Converters (ADCs)
8 High Current Relay Driver Outputs (500mA Each)
4 x 4 Matrix Keypad Interface
256 Backlight and contrast levels
Frequency definable Buzzer
8 User Definable Characters
2400 - 57,600 Baud Data rate
Built-in Voltage Regulator allows 5 - 15 Volt operation

Here. I had a quote from the UK distributor for about £50 I think.

You'd have to source a keypad - RS do some matrix keypads but they're a bit limited in range and style.

Its designed to be controlled by something else (a PC) via RS232 (which would be perfect from my appliaction). Goodness knows whether they'd release the source and allow you to build your own application on top.

There are some LCDs with small cursor keypads built in now available for PCs (e.g. Here. Again controlled by RS232 so you'd either have to put another PIC in to control them or start again and just use the hardware.

If you do find something let me know

Deano

john banks

When I first saw the LCD I thought it had the uC on it - that would be the dream as it is a good looking display.

http://www.r2-controls.com/r2web/pro...101gazelle.htm This is the nearest I saw, has a lot of features.

[Edited by john banks - 4/25/2003 7:55:45 PM]

john banks

Don't know anything about palms as never fiddled, but could be a nice base? How do you interface them to analogue in/outs?

DuncanG

How about this wee thing: http://www.technologicalarts.com/myf...9S12DP256.html

MCU Features:
* 76 I/O lines with multi-property programmability (eg. input/output, pull-up/pull-down, reduced drive, inverted polarity, etc.)
* 16 inputs (analog or digital)
* 5 x CAN 2.0 A/B
* 1 x J1850
* dual independent 8-channel 10-bit ADCs
* 8 channel/8-bit or 4 channel/16-bit PWM
* 8 channel, 16-bit enhanced capture timer
* dual SCI
* I2C bus
* up to three SPI
* internal memory configuration:
o 256K Flash
o 12K RAM
o 4K EEPROM
* fast, high-endurance Flash (tens of thousands of erase/write cycles)
* advanced security features for protecting program memory

Connected to a Noritaki VFD with keyboard encoder from Farnell.

There's a free Gnu C compiler available for it.

David_Wallis

top

dsmith

Someone else's project

Designed as a PIC Application prototyping board. Support for LCD and I/O from 16F84 style PICs. No direct keypad support but might be a starting point ?

Deano

[Edited by dsmith - 4/28/2003 10:52:19 AM]

john banks

I'm leaning towards the DT006 since I've used it before. Might just plug the laptop into the RS232 to set it up. A coarse adjuster in cabin from a variable resistor would allow on road global adjustments to fuelling/timing.