Its Alive ...its ALIVE!!!

Today andy and I finally got the buggy to follow the line.

What we did:

1. Firstly we attached the leds to the chassis and with a bit of soldering we connected them to the circuit board. one of the main problems we encountered doing this was that the leds kept on short circuiting due to the meccano struts. To get round this we had to wrap the legs in insulation tape.
2. Next we did the same with the LDRS. we decided to have the LDR's 6cm apart as we found that when they were any closer the buggy would over correct itself and when they were further apart the buggy the was not sensitive enough.The LDR's were also 2cm from each led, we found that this arrangement provided the LDR ' s with enough light to adequately read this light differences produced as the buggy rolled over the black line. The LDR's were also placed aproximately half way between the front and back wheels. we thought this best because when our buggy turns, the wheels rotate in opposite directions, however sometimes the back wheels slip which makes the centre of the buggy the axis of rotation.which is where we tried to place the LDR's.
3. finally we created a paper guard that we coloured in black to absorb an outside light (i.e. from sun etc.) and provide a constant environment at which the LDR's could work under.
4. After this it we began calibrating the LDR' which was simply a case of trial and error.