By Composite Design
The Composite
Design Lamp Test Circuit Assembly provides an easy means
to test up to ten lamp/annunciator circuits.
It is connected in line between
typically used warning switches & senders
found in most aircraft.
The circuit is
programmable such that there is a setup switch for each
channel. The switches are set according
to the type of sender used for
each channel so that when the unit is activated
it will provide the
proper stimulus to the lamp or annunciator
being used.
Some examples:
* A 'PUMP ON' lamp, connected to an electric
fuel pump, will light when
power is on to the
fuel pump & other end of the lamp is to ground.
The switch for that
channel will be set to SENDER TYPE = HI
* A 'LOW OIL PRESSURE' lamp usually has
one end connected to +12V and
is turned on when
the sender on the engine provides a GROUND path...
The switch for that
channel would be set to SENDER TYPE = LO
The Lamp Test Circuit
Assembly consumes NO power when NOT activated.
The power required when in test mode is
less that 1/4 Amp, not including
power for the lamps or annunciators. Each
channel can handle a load of
1/5 Amp, or about 2 Watts maximum!
Each channel is wired
with ~330 ohm series resistor for driving LED's.
If a lamp or other type of annunciator
is to be used, short that
resistor with a short length of solid wire
soldered into the extra pads
that are found by the end of each resistor.
Price:
$150 ($160
for 28 Volt System). International Shipping Available,
6% Sales Tax For Units Shipped Within The State
Of Florida.
copyright 1997-2008, Custom
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