Mini 2-wheel robot with IR sensor weight 14gr and ATTiny13 Soic

Step 2 Now the realization .....

I assume you have already created a transparent, an insolated an etched PCB and PCB epoxy
I also do not detail the manipulations.
If this is not the case, it is better necks begin by an electronic circuit
easier with components of normal size because the SMC components (surface mount)
are very delicate to handle and so we move to weld the weld.

After burning the PCB place a drop of solder at the point where the components will be
welded and flatten with a fine file (see photo) that allows you to place components more easily.
Then check with a magnifying glass that the tracks do not touch, clean the circuit with a toothbrush or a klinex and acetone.

The micro controller is a circuit that feared the heat, I also solder a tip:
I place it in my car serante tweezers and immersed in a glass of cold water,
I shake the whole, j 'tin pins, I repeat the manipulation with the glass of water and then positioned on the PCB by holding it with the pliers so that emissions of heat sink (see photo)
Then, I welded all the other components with the same precautions to avoid the double-sided
I put the straps on stiff wire wire-like phone.

When welding is completed, I recheck with the magnifying glass and spent my tour with acetone to remove the excess solder flux.
The RR chassis is made from a piece of PVC (30 mm rod power in France) or with materials as light as possible, the wheels are made with box plugs tablets micro motors stuck his staggered with a good glue and the battery is taped to the back for a good balance, it is necessary that the weight is borne on the back.