EE 330 FINAL PROJECT

LAZER FAST GO-GO RYDER

Alex KittermanRichard Sutton

Project Statement Design circuit to control RC-Car

5 separate receivers○ Forward, Reverse, Left, Center and Right○ Left and Right need to latch

Receivers triggered by a laser○ Up to 3 stories away

Step 1: Motor Control H-Bridge Circuit

NPN and PNP transistors○ Allows for “flipping”

of poles needed to get forward and reverse

Motor Control Testing of H-Bridge With proper Voltages applied

(equivalent of 3AA batteries)Could not read the 3V needed

to get to motorAdjusted Resistance values,

different combinations of NPN and PNP transistors○ Still no luck

After research found a Specialized IC○ Able to run on supplied voltage

Forward and Reverse Controlling the H-Bridge

2 light controlled voltage dividers ○ Fed into inverters ○ Used voltage buffers to ensure

H-Bridge chip receives digital high or low

Included a potentiometer ○ Able to adjust sensitivity of

voltage divider dependent on given ambient light

Steering Control Originally tried with SR latches

Ran into Problem with not being able to apply a third position○ SR latch only have a “Set” and “Reset”

Ended up using a manipulation of the circuit from Lab 9 The laser controlled light

Steering Control Cont. Video shows what

discussed in previous slide

Both lights off show centered car

Lights corresponding to Left and Right directions

To implement this in circuit• We had a left over

Opto-Coupler from another project

• Used to interpret on and off of SCR

Schematic Wanted to further

and implement our designCreated schematic

○ Created layout through Dip-Trace (One member familiar with program already)

Layout Once Schematic

createdCan create the

corresponding layout pattern

Can move the different parts to a desired location○ Allowing PCB to

fit within the RC-Car

Auto Route of Layout This step places all copper traces to hook up

different components

Top Copper and Silk Screens Bottom Copper and Silk Screens

All together Sent needed

files to Advanced Circuits for fabrication

Received fabricated PCB Friday, May 3rd

Assembled/soldered and implemented into car

Completed PCB

Testing Initial testing

Forward/Reverse ○ Functioned properly

Steering○ Worked but needed adjustments ○ While adjusting we fried our chip○ Tried to debug, no luck

Went with our plan BBuild on original breadboard

Conclusion Plan B Final design Nice being able

to apply knowledge in an enjoyable, fulfilling project

Completed Circuit