casing is generic and square- no cutout. There is a dot on one of the leads; is this the LED anode?
Here is an easy way to find out: put another LED is series (with its cathode to ground) and use a 4k7 resistor or similar. Apply 9v. If the second LED lights up, the mark on your vac is the anode (my NSL have the mark on the cathode, BTW).
Quote from: madbean on September 26, 2016, 11:24:23 PM
Here is an easy way to find out: put another LED is series (with its cathode to ground) and use a 4k7 resistor or similar. Apply 9v. If the second LED lights up, the mark on your vac is the anode (my NSL have the mark on the cathode, BTW).
I did the obvious thing: used my DAC55 :P
It's cathode.
Cool tip! Thanks!