1. Electronic Drum Set Zachary Dziczkowski – EGRE 631 – Dr. Tucker

2. What’s the Difference Acoustic Set Electronic Set

3. Sound Processing Pintech RS-5 Piezoelectric Transducer

4. Sound Processing Pearl MFH Mesh Drumheads

5. Sound Processing Drum Module

6. My Design RS-5 University DC Computer Sensor Drum Module Amplifier UART, A/DJava

7. Drum Trigger Piezoelectric Transducer RS-5 ¼” Jack RS-5 Sensor

8. University DC Drum Module UART, A/D Used ADC1 to read sensors Problems with ADC0 Used UART1 to send data to computer Problems with UART0

9. Configuring ADC1 Used ADC1 to read sensors ADC1 can be connected to Port 1 8-channel 8-bit 500ksps

10. Configuring ADC1 Setting up ADC1 1.Set Port 1 to analog input. Set P1MDIN to 0x00 2.Tell Timer 3 to use the system clock Set TMR3CN to 0x00 3.Initialize Timer 3 with a value 4.Enable Timer 3 Set TMR3CN to 0x04 5.Set the reference voltage for ADC1 6.Tell the mux which input to read first Set AMX1SL to 0x00

11. Configuring UART1 Used UART1 to send data to computer UART1 can be connected to Port 0 Uses Timer 4 Mode 1, Asynchronous, 10-bit 115,200 Baud

12. Configuring UART1 Setting up UART1 1.Set crossbar to output UART1 to P0 Set XBR2 to 0x44 2.Tell Port 0 to be digital ouputs Set P0MDOUT to 0xF0 3.Tell UART1 to use Timer 4 Set T4CON to 0x30 4.Initialize Timer 4 to the appropriate value for the Baud rate. 5.Enable Timer 4 6.Tell Timer 4 to run off of the system clock Or CLKCON with 0x40

13. Configuring UART1 Setting up UART1, continued 7.Tell UART1 to run in Mode 1 Set SCON to 0x50

14. Command Specs A (0x41) = Trigger #1 B (0x42) = Trigger #2 (unimplemented) C (0x43) = Trigger #3 (unimplemented) and so on… Eventually, Java program sends back an ACK, perhaps.

15. Computer Responsibilities 1.Read data from Microprocessor 2.Load/Play appropriate WAV 3.Amplify output Computer Amplifier Java

16. Java Program Algorithm 1.Initialize serial communication 2.Initialize WAV player 3.Listen for data on serial line 1.Read command 2.Play corresponding WAV file

17. Final Prototype RS-5 Transducer RS-232 Line Driver University DCScope Probe 

18. Issues UART0 Electromagnetics Ugh… Redundant Data Sensor Sensitivity is too high Ways to mitigate this? Deploy Design Use the University DC, PIC Serial Communication Move to USB

19. Future Work Add seven more sensors Move to USB Construct frame to support drums. Increase usability of GUI

20. Questions? REFERENCES I. Silicon Laboratories. (2009, Mar.) C8051F020/1/2/3. PDF Datasheet. I. Microchip Technology. (2007) PIC18F2455/2550/4555/4550 Datasheet. PDF Datasheet. (2009) Pintech Electronic Percussion. [Online]. http://www.pintechworld.com/shop/scripts/prodView/asp?product=100 (2009, Apr.) RXTX: serial and parallel I/O libraries supporting Sun's CommAPI. [Online]. http://rxtx.org (2009) Java Sound API. [Online]. http://java.sun.com/products/java-media/sound/ (2009) Java Communications API. [Online]. http://java.sun.com/products/javacomm/ (2003, Aug.) jUSB for Windows 2000/XP Project. [Online]. http://www.steelbrothers.ch/jusb I. Tektronix, TDS1000B and TDS2000B Series Digital Storage Oscilloscope User Manual. Beaverton, United States, 2009.