Hi
I have a project to build a laser trip timer using a 5v small laser and an LDR.
The laser requires 5v and I can only think of using a 9v battery as it is portable and am thinking of using an 7805, 9v to 5v regulator and connect it in the following manner. Do I replace the 1K resistor and the LED with the load or just the LED.
It will be used outside.
I hope this won't run into that problem described in one of these threads that the battery usually drops to 7.2v and the 78m05 performs poorly under 8v.
It won't be constantly on, only when I plan to use it. for about 10 mins then turn it off until I want to use it again in about 10 mins later and turn it on again.
The LDR will be connected to the arduino to detect the trip in the laser.
Do I need a driver for the laser and which one would you recommend.
Thanks
I have a project to build a laser trip timer using a 5v small laser and an LDR.
The laser requires 5v and I can only think of using a 9v battery as it is portable and am thinking of using an 7805, 9v to 5v regulator and connect it in the following manner. Do I replace the 1K resistor and the LED with the load or just the LED.
It will be used outside.
I hope this won't run into that problem described in one of these threads that the battery usually drops to 7.2v and the 78m05 performs poorly under 8v.
It won't be constantly on, only when I plan to use it. for about 10 mins then turn it off until I want to use it again in about 10 mins later and turn it on again.
The LDR will be connected to the arduino to detect the trip in the laser.
Do I need a driver for the laser and which one would you recommend.
Thanks