Finally! Mr Transistor ignites laser

I say finally because after a lull of no posts in a week, I finally post something. However, more importantly I say “FINALLY” because after putting an old project away for months, a year, longer (?), I’ve finally managed to get a transistor to turn my last diode on and off, producing enough light to be seen across the room! A green laser too! This means I can draw on the wall with a laser…

Where it all began.. I ordered and received my Arduino open source electronics prototyping platform (Arduino Uno) a long time ago, maybe a year.. maybe less, anyway sometime ago, a while back, in a time unknown, I needed something to make.

I had plenty of ideas but they would involve some outlay of cash, I needed something else.. something from bits of rc planes.. Electric motors, speed controllers and servos. whilst tethered to my Arduino, I didn’t want moving ideas with spinning propellers, so I was left with servos… ooo, and a laser pointer.. Why not…

after a stroll along the Arduino learning curve, I’d managed to:

draw a box, a circle and a sine wave with a laser..
Use a mouse to control the laser dot on the wall..
Added buttons and LEDs for input and info
Made it draw a couple of stars and write my name..
built a PC app that allows someone to program a routine from a PC where dots are drawn

Now I can switch the laser on and off in the program, it makes for much better fit drawing. There Ste some bus to remove and tweaks to be here but it’s functional!

Lastly, thanks to all of those reading this blog. anyway, it’s way past my bed time, and I’m bit going to proof read this. It may not make sense!

More soon..

Composed on my phone. Eek  mistakes?