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From: jeffj@sfmin.UUCP (J.S.Jonas)
Newsgroups: net.analog,net.wanted
Subject: arc lamp power supply design needed
Message-ID: <632@sfmin.UUCP>
Date: Wed, 18-Dec-85 11:28:12 EST
Article-I.D.: sfmin.632
Posted: Wed Dec 18 11:28:12 1985
Date-Received: Fri, 20-Dec-85 01:33:43 EST
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Xref: watmath net.analog:567 net.wanted:7789

[spritzensparken!]

	I need the design for a power supply for a Sylvania C10/DC
Concentrated Arc Lamp, 10-watt, DC.

	Here are the lamp specs:
AVERAGE CHARACTERISTICS
voltage across lamp	21 VDC
current through lamp	0.5 amps
candlepower		4.7 cp
diameter of light source .4mm.; 0.016 in.
	This lamp has a negative volt ampere characteristic,
so must be provided with a suitable ballast whose resistance
will depend upon the d-c supply voltage.  It is recommended
that a d-c voltage of at least 50 volts be used with
sufficient resistance in series with the lamp to
limit the current to 0.5 ampere.  The lamp requires a momentary
starting potential of 1,000 volts or higher.

	The bulb has two connections: cathode and anode.

	Thanks in advance
				Jeff 'more bright ideas?' Skot
				{ihnp4 | allegra | mcnc} attunix ! jeffj