KitCarlson looking for Beta Tester, KitCarlson EMS nears Beta Release Options

[KitCarlson]

EMS development has gone well. The D-Jet replacement with DIS ignition is a success, very pleased with how well it drives and the ease of setting it up. Now a second opinion is required to gain additional field experience.

One unit will be given away in return for testing the unit, and providing feedback in a timely manner.

This first candidate must have the following qualifications and equipment:

1. Experience in using RS232 terminal program (Hyperterm is an example) on a portable PC.

2. A donor car, Porsche or VW with 1.6L, 1.7L or 2.0L D-jet system, due for replacement. Fuel system and engine should be in good working order.

3. Electrical and mechanical skills: capable of replacing a distributor and TPS, mounting coil and unit, setting dead timing also following a wiring diagram.

4. Engine tuning experience. Basic trouble shooting skills. Experience with multimeter.

5. The ability to work and resolve issues if they arise using e-mail.

6. The time to do it! If everything is ready, a few hours for install.

Beta testing will begin in about two months (after holidays).

"There can only be one!" (Highlander)

If interested please send to me offline in 500 words or less, enough to convince me you are the one.

Please no hard feelings, if you are not chosen at this time.

KitCarlson (IMG:style_emoticons/default/laugh.gif)
Please visit: http://home.mindspring.com/~dave.c/kitcarlson/

[fiid]

Thats ok. None of the cars I plan to tune will have points.

If the brain is mounted in the passenger compartment and I'm tuning from the passenger seat... I dont see a problem.


B

The difference is the wire protocol, not the cable. There is no problem with your plan - I'm just nitpicking.. :-)

AFAIK, Ethernet is TTL - so 0v is off and 5v is on. It's very fast, and the wire goes pretty much directly into the logic circuit that processes it. This is why plugging the phone cord into an ethernet card tends to fry it.

RS232 is +12 on and -12 off. It's much harder to confuse it with little voltage spikes. It's also much slower.

RS232 goes through a shitload of buffering before it gets to any of the logic. You should be able to wire up your RS232 port to a 110volt wall outlet and it still work afterwards (do not try this at home - most RS232 ports are not TRUE RS232 - they are just compatable... but still much better buffered.

Anything capable of delivering a spark is capable of introducing enough noise in ethernet to disrupt transmition, (unless you are using super-shielded cable) - but I would still shy away from it. It might introduce enough noise to fry things. If you want high speed networking as opposed to a point to point link (RS232) you can use the CAN bus which is designed for this type of environment.

Early radio transmiters used exactly this method of signal generation actually - thay had a little wheel which introduced constant sparks - it makes a clean enough sine wave to transmit morse code.

Your plan of using RS232 over CAT5 cable is perfectly solid. There are plenty of adaptor kits available (for cisco gear) that will see you right.