reverse polarity – Experimental Engineering

Power Requirements for He-Ne Lasers

Power for a He-Ne laser is provided by a special high voltage power supply and consists of two parts (these maximum values depend on tube size – a typical 1 to 10 mW tube is assumed): Operating voltage of 1,000 to 3,000v DC at 3 to 8mA.Like most low current

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Hacks, Personal Project, Randoms

ZyXel WAP3205 Repair

November 20, 2014 The Engineer

Here is a ZyXel WAP3205 WiFi Access Point that has suffered a reverse polarity event, due to an incorrect power supply being used with the unit. While most electronic gadgets are protected against reverse polarity with a blocking diode, this unit certainly wasn’t. Applying +12v DC the wrong way round

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