Hi.
May be it's my age but I'm a bit confused with a laser diode driver I just bought.
This is the one:
In the image on the left it shows "TTL -" on the bottom right pad of the board next to the Laser Diode "-"
In the image on the right it shows the back of the board and shows "TTL -" that appears to be shared with the GND connection of the power input (5Volts + and GND).
What I don't understand is why are there 2 connections for the "TTL -"
When I connect a multimeter set to continuity, the 2 different pads are not connected.
Any ideas about this would be really helpful.
May be it's my age but I'm a bit confused with a laser diode driver I just bought.
This is the one:
In the image on the left it shows "TTL -" on the bottom right pad of the board next to the Laser Diode "-"
In the image on the right it shows the back of the board and shows "TTL -" that appears to be shared with the GND connection of the power input (5Volts + and GND).
What I don't understand is why are there 2 connections for the "TTL -"
When I connect a multimeter set to continuity, the 2 different pads are not connected.
Any ideas about this would be really helpful.