1. Alex Kitterman Richard Sutton

2. 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

3. Step 1: Motor Control  H-Bridge Circuit NPN and PNP transistors ○ Allows for “flipping” of poles needed to get forward and reverse

4. Motor Control Testing of H-Bridge  With proper Voltages applied (equivalent of 3AA batteries) Could not read the 3V needed to get to motor Adjusted Resistance values, different combinations of NPN and PNP transistors ○ Still no luck After research found a Specialized IC ○ Able to run on supplied voltage

5. 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

6. 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

7. 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

8. Schematic  Wanted to further and implement our design Created schematic ○ Created layout through Dip-Trace (One member familiar with program already)

9. Layout  Once Schematic created Can create the corresponding layout pattern Can move the different parts to a desired location ○ Allowing PCB to fit within the RC- Car

10. Auto Route of Layout  This step places all copper traces to hook up different components Top Copper and Silk ScreensBottom Copper and Silk Screens

11. All together  Sent needed files to Advanced Circuits for fabrication  Received fabricated PCB Friday, May 3 rd Assembled/sol dered and implemented into car Completed PCB

12. 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 B Build on original breadboard

13. Conclusion  Plan B  Final design  Nice being able to apply knowledge in an enjoyable, fulfilling project Completed Circuit