At 10mm x 10mm, this is one of the smallest 555 I.C circuits you'll ever see!
Step 1: The Idea
So far this has just been a project of mine to shrink down a 555 timer circuit as small as I can using micro electronics.
The circuit is pretty self explanatory.
Experiment with different resistors to get different speeds if you're using it with LEDs.
I used a 0.4mm sized soldering tip to solder all the components too as this was really difficult & I needed a tiny needle point tip to solder most joints.
Step 2: Parts List
Surface mount 555 timer IC - LM555CMM (MSOP-8 size)
100nf 0603 capacitor
All resistors are 0603 size, 1% tolerance
Transistor - SMT 3904, size SOT-323