Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Any interest in developing an open source fuel economy gauge/computer?

dcb · 03-22-2008, 11:09 AM

I'm sorry, when I say basic stamp, I'm thinking of the *dunio, that is not technically accurate. I'll calm down once we get something that works, I promise.

LostCause, or metroschultz? can I ask you to do some analysis of the following? I'd like to get a handle on how much potential there is for these devices and maybe we can focus on where the need is, and blow our own horn a bit:
1. How many vehicles on the road are 1996 and newer?
2. How many vehicles on the road have electronic fuel injection but are pre '96?
3. How many vehicles on the road are Carbureted
4. How many vehicles on the road are Diesel?
Vehicles can be cars, trucks, semis, motorcycles, etc. US numbers are probably easiest to get but the world picture would be nice too.

Note, you don't have to buy a palm for developing the fuel injection interface, someone can just convert the java laptop thingie to use the same serial port protocol as the palm is planning on. Heck, use the dunio to write the fuel injection interface circuit, if no one comes up with a cheap pic version it might be all we have for starters. If someone does step up to the cheap pic/circuit version then you can focus on the dunio user interface if you like.

Coyote? S2? Can you gentlemen agree to sort out a low cost vehicle injector/vss monitor to rs232 circuit? Here is the el cheapo programmer I ordered: http://cgi.ebay.com/ws/eBayISAPI.dll...m=310032761189 but I'm not married to it. It mentions some free programming utilities, etc. Should work with the following microchip pics:
PIC12F629 Flash 8-pin 1kb 20MHz Microcontroller http://www.futurlec.com/Microchip/PIC12F629.shtml
PIC12F635 Flash 8-pin 1kb 8MHz Microcontroller
PIC12F675 Flash 8-Pin 1kb 20MHz Microcontroller with A/D
PIC12F683 Flash 8-Pin 2kb 8MHz Microcontroller with A/D
PIC16F636
PIC16F639
PIC16F684 Flash 14-pin 3.5kB Microcontroller with PWM (might be fun for an analog mpg gauge)
PIC16F685
PIC16F687
PIC16F688
PIC16F689
PIC16F690 Flash 20-pin 4kB Microcontroller
PIC18Fx6x0
PIC18Fx550

Also for fun, I discovered and played with the preferences screen last night, it supports six languages! I added a selection for OpenGauge setup

I don't think I want to fight the layout management in obd gauge very much, basically I am planning on adding "computed" rows that you can add or delete from various pages, i.e.: Instant MPG, tank MPG, current MPG and maybe set it up so you can get 8 items on one screen.

03-22-2008, 11:09 AM	#80 (permalink)
dcb needs more cowbell Join Date: Feb 2008 Location: ÿ Posts: 5,038 pimp mobile - '81 suzuki gs 250 t 90 day: 96.29 mpg (US) schnitzel - '01 Volkswagen Golf TDI 90 day: 53.56 mpg (US) Thanks: 158 Thanked 269 Times in 212 Posts	I'm sorry, when I say basic stamp, I'm thinking of the dunio, that is not technically accurate. I'll calm down once we get something that works, I promise. LostCause, or metroschultz?* can I ask you to do some analysis of the following? I'd like to get a handle on how much potential there is for these devices and maybe we can focus on where the need is, and blow our own horn a bit: 1. How many vehicles on the road are 1996 and newer? 2. How many vehicles on the road have electronic fuel injection but are pre '96? 3. How many vehicles on the road are Carbureted 4. How many vehicles on the road are Diesel? Vehicles can be cars, trucks, semis, motorcycles, etc. US numbers are probably easiest to get but the world picture would be nice too. Note, you don't have to buy a palm for developing the fuel injection interface, someone can just convert the java laptop thingie to use the same serial port protocol as the palm is planning on. Heck, use the dunio to write the fuel injection interface circuit, if no one comes up with a cheap pic version it might be all we have for starters. If someone does step up to the cheap pic/circuit version then you can focus on the dunio user interface if you like. Coyote? S2? Can you gentlemen agree to sort out a low cost vehicle injector/vss monitor to rs232 circuit? Here is the el cheapo programmer I ordered: http://cgi.ebay.com/ws/eBayISAPI.dll...m=310032761189 but I'm not married to it. It mentions some free programming utilities, etc. Should work with the following microchip pics: PIC12F629 Flash 8-pin 1kb 20MHz Microcontroller http://www.futurlec.com/Microchip/PIC12F629.shtml PIC12F635 Flash 8-pin 1kb 8MHz Microcontroller PIC12F675 Flash 8-Pin 1kb 20MHz Microcontroller with A/D PIC12F683 Flash 8-Pin 2kb 8MHz Microcontroller with A/D PIC16F636 PIC16F639 PIC16F684 Flash 14-pin 3.5kB Microcontroller with PWM (might be fun for an analog mpg gauge) PIC16F685 PIC16F687 PIC16F688 PIC16F689 PIC16F690 Flash 20-pin 4kB Microcontroller PIC18Fx6x0 PIC18Fx550 Also for fun, I discovered and played with the preferences screen last night, it supports six languages! I added a selection for OpenGauge setup I don't think I want to fight the layout management in obd gauge very much, basically I am planning on adding "computed" rows that you can add or delete from various pages, i.e.: Instant MPG, tank MPG, current MPG and maybe set it up so you can get 8 items on one screen. __________________ WINDMILLS DO NOT WORK THAT WAY!!!