Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Best place to switch the circuit.

WWC

0
Joined
Oct 26, 2014
Messages
19
Points
0
I am wanting to find the best place to switch my laser on and off. I uploaded a terrible picture of my circuit.

Basically what i have drawn is switching the ground from the power supply to the driver circuit via a transistor and a relay. Is this the best place to switch this circuit?
 





WWC

0
Joined
Oct 26, 2014
Messages
19
Points
0
Ah darn. Ok i hosted on Photobucket. Hopefully it is working now.

IMG_20141117_163209_zps91e445a9.jpg
 
Joined
Feb 5, 2008
Messages
6,252
Points
83
Yes this is correct.

Most important thing is that you do not place the switch after the driver. The diode and driver must be permanently connected.
 

WWC

0
Joined
Oct 26, 2014
Messages
19
Points
0
How about if i just used a MOSSFET instead of the transistor and relay so the relay is not clicking all the time. Another variation i was thinking of is switching the ground of the laser for on / off control.
 
Joined
Feb 5, 2008
Messages
6,252
Points
83
That is up to you. Transistor switching should be more reliable, and MUCH faster than relay. If you are using it for CNC application, relay would be too slow to switch the laser ON/OFF fast enough for the laser to draw the patterns you need.
 

WWC

0
Joined
Oct 26, 2014
Messages
19
Points
0
It is in fact for a CNC so i will probably go with a transistor or MOSSFET

Thanks Eudaimonium for your help in answering my question.
 
Joined
Feb 5, 2008
Messages
6,252
Points
83
No problem, glad I could help.

If you need anything else, feel free to send me a personal message.
 




Top