Neil,
My 68 seems to like about 8 volts. See Tom's post below regarding making one
from a lm317 .... be careful on the polarity of the tantilum output cap,
they explode when reversed =:o
Todd Osborn
San Jose, CA
>From Tom Walter:
There have been a few versions of the solid state regulator made up. I
posted the version below, to which Lou in Australia pointed out a LM7808
(fixed regulator) would have saved me a few resistors. ;-)
Barrie reported his roadster "liked" 7.3 volts, someone else cameback
with 7.6 volts, and my
car seemed to prefer closer to 8.0 volts for a fixed voltage to replace
the mechanically instrument voltage regulator.
Have fun!
Cheers,
Tom
wrote this a while back:
> For the voltage regulator, those electronic hobbyist
> on the list should be able to make a simple replacement.
>
> Parts list:
>
> LM317T (T0-220 package)
> R1 (out to adj pin) 220 Ohm
> R2 (adj to gnd) 1200 Ohm
> Diode (Voltage to in) IN4007
> input cap 0.1ufd (disc 60V is fine)
> output cap 1.0ufd (tant. atleast 16V)
>
> For the circuit, look at a LM317 datasheet. Check the
> LINEAR Databook's (Motorola, National Semiconductor, etc).
> The diode just prevents reverse voltage spikes from damaging
> the regulator.
>
> Mount the heatsink tab with mica washers (pin 2 is connected
> to the tab). Output voltage is apprx 8V.
>
> Note: I think the system, as a whole, was temperature
> compensated. The electronic regulator may cause the gauges
> to read a little higher when it is HOT outside (haven't
> investigated this).
>
> Everything should fit back inside the original case,
> keeping a stock appearance.
>
> For thosee who are NOT electronic hobbyist, it is still
> much simplier to replace the OEM unit with one from
> NISSAN (about $13).
----- Original Message -----
From: "Neil Levine" <nalevine@dcn.davis.ca.us>
To: <datsun-roadsters@autox.team.net>
Sent: Friday, August 10, 2001 3:40 PM
Subject: gauge regulator
> The gauge voltage regulator under the dash of my '66 just started acting
up
> with my fuel and water temp gauges floating to the left side. Anyone got
an
> extra used one in good working order? I suppose I could build one with a
> voltage regulator chip. Does anyone know the required voltage and current
> specs.?
>
> Neil Levine
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