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| Forum name | Engine Management Systems & Controllers |
| Topic subject | Help with shift light and launch control circuit |
| Topic URL | http://forums.2gnt.com/dcboard.php?az=show_topic&forum=54&topic_id=5203 |
5203, Help with shift light and launch control circuit
Posted by freakingbori617, Dec-31-69 06:00 PM
Ive searched all over and dont fully understand what i need to do. For the shift light all im going to use is 1 simple led. 
Second is the launch control i found this on tuners http://www.dsmtuners.com/forums/420a-engine-management/381707-help-2-step-schematic-megasquirt.html VelocitàPaola explains it just want to verify that is correct.
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5208, RE: Help with shift light and launch control circuit
Posted by VelocitaPaola, Dec-31-69 06:00 PM
Originally posted by freakingbori617
Ive searched all over and dont fully understand what i need to do. For the shift light all im going to use is 1 simple led.
What kind of MegaSquirt ECU do you have? MS1? MS2? The schematic you posted only applies to a particular kind of shift light for use with MS1. For MS2, you want to build a programmable output circuit. Be sure to use about a 330 ohm resistor inline with the LED:
http://www.msextra.com/doc/ms2extra/MS2-Extra_Hardware.htm#outputs
(The diode isn't necessary if you're only driving an LED)
Yep, that's correct. ;-)
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5210, RE: Help with shift light and launch control circuit
Posted by freakingbori617, Dec-31-69 06:00 PM
I have ms1 v3. and I want to use a 12v light that I bought at radio shack I just noticed its not an led it says lamp, package didnt have any specifications on it.
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5211, RE: Help with shift light and launch control circuit
Posted by VelocitaPaola, Dec-31-69 06:00 PM
Originally posted by freakingbori617
I have ms1 v3. and I want to use a 12v light that I bought at radio shack I just noticed its not an led it says lamp, package didnt have any specifications on it.
In that case you want the "single light" option as described here:
http://www.msextra.com/doc/ms1extra/MS_Extra_Hardware_Manual.htm#shiftled
The circuit you will have to build can be found here:
http://www.msextra.com/doc/ms1extra/MS_Extra_Hardware_Manual.htm#outputs
Just connect the input of the circuit to JS2. Since the "lamp" you have could be an incandescent bulb, I'd recommend using the diode; in other words, build the circuit exactly like you see it in the link.
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5212, RE: Help with shift light and launch control circuit
Posted by freakingbori617, Dec-31-69 06:00 PM
and that whole circuit is to be built in the pronto area?
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5213, RE: Help with shift light and launch control circuit
Posted by VelocitaPaola, Dec-31-69 06:00 PM
Originally posted by freakingbori617
and that whole circuit is to be built in the pronto area?
Yes. It's only three components... a resistor, a transistor, and a diode.
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5214, RE: Help with shift light and launch control circuit
Posted by freakingbori617, Dec-31-69 06:00 PM
in the diagram it shows a relay coil also.
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5215, RE: Help with shift light and launch control circuit
Posted by VelocitaPaola, Dec-31-69 06:00 PM
Originally posted by freakingbori617
in the diagram it shows a relay coil also.
The relay coil represents the load; in your case the load is the indicator lamp.
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5216, RE: Help with shift light and launch control circuit
Posted by freakingbori617, Dec-31-69 06:00 PM
ok that got me super confused because the relay coil had a part number. Seems pretty straight foward, hopefully ill get it to work.
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