i have a chance to get all the gear for a tuned port injection for my 55
chevy truck right now i got a 350 2 bolt with a carb has anyone did this
befor and if soo how hard is it and what do it intail
do anyone have a website showing this ?or is it really worth it
thanks in advance
mike
----- Original Message -----
From: <josiah.bartlett@exgate.tek.com>
To: <GremlinGTs@aol.com>; <oletrucks@autox.team.net>
Sent: Friday, April 05, 2002 3:02 PM
Subject: RE: [oletrucks] Electronic Gadgets for trucks..LED voltmeter/ IC
chip
> Yes, the chip provides all the regulation necessary to drive the LED's. It
> will run on 12 volts, but it gets a little warm at that voltage and it is
> not supposed to be used continuously in bar mode because the package can't
> dissipate that much heat, so a regulator like the LM7805 should be used to
> drop the voltage to 5. That would keep things nice and cool and keep the
LED
> brightness steady, since the voltage supplied in the car will be anything
> from 11 to 15 volts. It would also permit the meter to be used on a six
volt
> electrical system. Here is a link to a similar circuit to mine (I changed
it
> slightly to fit what I needed) http://pages.prodigy.net/bipes/afschem.htm
>
> This is a Dick Bipes circuit. I have a simplified version of the second
> circuit set up on a test board. I changed the input voltage to 5 to allow
6
> volt use and keep the thing from melting on hot days. His circuit will be
a
> little iffy if used in 90+ degree weather.
>
> http://come.to/miata
>
> This page describes the circuit a bit better and has several others. Just
> click on the techie stuff link.
>
> You can also download the data sheet for the chip directly from national:
> http://www.national.com/pf/LM/LM3914.html#Datasheet
> You can figure out how to pick the resistor values from that.
> I hope this stuff helps.
> Regards,
> Josiah
> -----Original Message-----
> From: GremlinGTs@aol.com [mailto:GremlinGTs@aol.com]
> Sent: Thursday, April 04, 2002 8:25 PM
> To: Bartlett, Josiah
> Subject: Re: [oletrucks] Electronic Gadgets for trucks..LED voltmeter/
> IC chip
>
>
> Hey, thanks for that info on the LM3914 ! Ok, let me try to get this
> straight, as I am a Repair Tech, not a Design Tech. :) I can pick a
> resistor
> to have a 12-volt input reduced enough to activate the LED in delayed
> manner?
> Meaning, by staggering the values to the input of the IC chip, I can
> regulate
> when it activates the appropriate 2-volt output to the LED? That WOULD be
> perfect, I was having a HELL of a time trying to figure out how to drop
the
> 12 volts ( er, 10-16 volts ) enough thru each circuit and get 2 volts to
the
>
> LEDs without frying them crispy. I have enough of these little LED strings
> to
> experiment with for awhile, just need to find them again. They're in some
> little anti-static bag somewhere. I also have plenty of metal and plastic
> housings desposed of by my job, so I could go into limited production.
Maybe
>
> sell them for $10 each. Would'nt be fancy, but would be useable.
> Is this IC chip capable of handling the current load directly from the
> auto volt system, or would i need to buffer it thru a current limiting
> device
> somehow? As I said, I'm not up on design theory, just like to dabble a
bit.
> Thanks for any "input" on this subject, I might could even send you one
> after
> I'm done creating a few of them! :)
>
> Jerry Casper
> Tempest repair/production Tech, former X.25 Data Comm Tech...
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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