whatthephoton
New member
- Joined
- Nov 26, 2021
- Messages
- 6
- Points
- 3
hi,
This is my first post and first laser (other than those $2 diode laser modules from Aliexpress), a helium neon one I got for about $40 w/ power supply. The problem is the power supply has three wires on its input. I assume black is ground, red is +Vcc, but am not sure what to do with the purple/violet wire. The info plate on the power supply has been partially spray painted black to obscure the info, for whatever nefarious purpose I don't know. The info I can see: Data Logic, output 1500VDC @ 0.5mA. It looks like model is 111-1500-5-? but I don't find anything relevant despite many search keyword variations (I also searched laserpointerforums for general hene power supply info mentioning a third wire but didn't anything useful). I guess that Data Logic is the same as Datalogic which was Spectra Physics (wikipedia, /wiki/PSC_Inc.). I think the voltage should be 24V but am not sure and will take the approach of just increasing the DC input from 0V up to where the laser starts lasing as per Sam's ...laserhps.htm#hpstoc (sorry can't post links as a new user) "...voltage for such a supply if not labeled or listed below can be found by driving it from a variable DC source..." ... after I figure out this purple wire business.
So, does anyone know what to do with this third purple wire? I read Sam's laser page on HeNe laser power supplies and it mentions "Violet wire loop enables CDRH delay (cut to disable)", but this is not a loop on the supply I have, at least not that I can tell. It also mentions many DC supplies having a third wire that's yellow. I suppose it is some kind of enable line that needs to be tied either to ground or some positive voltage (5V TTL? +Vcc?). I'm hesitant to tie it either high or low for fear of causing some logic gate in the power supply to source or sink too much current and burn out (but I will try via a 1k resistor if nobody replies to this).
p.s. Three other newbie questions, in case anyone knows:
1. Can I assume that the sticker on the laser is probably correct, that the laser is <5mW (perhaps even 3.15? which is marked near the output), and that I don't need to use laser goggles with it?
2. Based on the pictures I'm attaching, are there any exposed parts I shouldn't touch (that are high voltage)? Obviously not the end where the high voltage (yellow) wire is attached, but what around that is charged, what other surfaces farther away would be at high voltage?
3. The power input connector is some kind of Dupont connector. Can anyone identify exactly what so I can order the mating connector to crimp onto my power supply leads?
This is my first post and first laser (other than those $2 diode laser modules from Aliexpress), a helium neon one I got for about $40 w/ power supply. The problem is the power supply has three wires on its input. I assume black is ground, red is +Vcc, but am not sure what to do with the purple/violet wire. The info plate on the power supply has been partially spray painted black to obscure the info, for whatever nefarious purpose I don't know. The info I can see: Data Logic, output 1500VDC @ 0.5mA. It looks like model is 111-1500-5-? but I don't find anything relevant despite many search keyword variations (I also searched laserpointerforums for general hene power supply info mentioning a third wire but didn't anything useful). I guess that Data Logic is the same as Datalogic which was Spectra Physics (wikipedia, /wiki/PSC_Inc.). I think the voltage should be 24V but am not sure and will take the approach of just increasing the DC input from 0V up to where the laser starts lasing as per Sam's ...laserhps.htm#hpstoc (sorry can't post links as a new user) "...voltage for such a supply if not labeled or listed below can be found by driving it from a variable DC source..." ... after I figure out this purple wire business.
So, does anyone know what to do with this third purple wire? I read Sam's laser page on HeNe laser power supplies and it mentions "Violet wire loop enables CDRH delay (cut to disable)", but this is not a loop on the supply I have, at least not that I can tell. It also mentions many DC supplies having a third wire that's yellow. I suppose it is some kind of enable line that needs to be tied either to ground or some positive voltage (5V TTL? +Vcc?). I'm hesitant to tie it either high or low for fear of causing some logic gate in the power supply to source or sink too much current and burn out (but I will try via a 1k resistor if nobody replies to this).
p.s. Three other newbie questions, in case anyone knows:
1. Can I assume that the sticker on the laser is probably correct, that the laser is <5mW (perhaps even 3.15? which is marked near the output), and that I don't need to use laser goggles with it?
2. Based on the pictures I'm attaching, are there any exposed parts I shouldn't touch (that are high voltage)? Obviously not the end where the high voltage (yellow) wire is attached, but what around that is charged, what other surfaces farther away would be at high voltage?
3. The power input connector is some kind of Dupont connector. Can anyone identify exactly what so I can order the mating connector to crimp onto my power supply leads?
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