Got myself going on a small project using an Arduino Uno for a PWM signal currently just driving some LEDs. Fade In and Fade Out working just fine on three channels. So I decided to get a look at my PWM signal using an old Tektronix 2225 50 MHz scope. The scope is piled on mt computer table with all sorts of junk and I used it a few weeks ago. I could not get a trace. Triggering lights working and tried moving the trace vertically but no trace. Push beam finder and still no trace. What the? I finally give the scope a gentle smack and momentarily I see a trace flicker past and again no trace.
A week ago I dug out a little magnetic parts tray (Harbor Freight) and without thinking set the thing on top of the scope. For a week I have been meaning to take the parts tray and put it with another like it on the Motorcycle Lift but always forgot to move it. I picked up the magnetic tray (little buggers have a strong magnet) and like magic there was my trace. Can't believe I did that! Anyway I thought I would share my moment of sheer stupidity with the class. Just got back from placing the magnetic tray on the motorcycle lift as I have been planning to do for a week. Guess I was motivated.
Ron
A week ago I dug out a little magnetic parts tray (Harbor Freight) and without thinking set the thing on top of the scope. For a week I have been meaning to take the parts tray and put it with another like it on the Motorcycle Lift but always forgot to move it. I picked up the magnetic tray (little buggers have a strong magnet) and like magic there was my trace. Can't believe I did that! Anyway I thought I would share my moment of sheer stupidity with the class. Just got back from placing the magnetic tray on the motorcycle lift as I have been planning to do for a week. Guess I was motivated.
Ron