hello ;i am leila
i found a laser diode drive circuit in internet but the thing is that i have some difficulties to understand how it works
if someone can help me on it or suggest me another circuit more simple please im waiting your help .here is the circuit

 

You tried to post a link to your computer, and that won't work.

You need to upload the circuit image to the forum. .PNG format files are preferred, because they are not "lossy" like .jpg images, and are much more compact than .gif images.

Click the "Go advanced" button below the text box, then "Manage attachments" on the next screen. Navigate to the file on your computer, and select it for uploading.