Ubicomp Development Basics
(mainly for use within
Equator and
Smart-Its)
Albrecht Schmidt,
albrecht@comp.lancs.ac.uk
Computing Department,
Lancaster University,
UK
Hardware Lab - Schematics & Boards - Software development - Components - Protocols- Contact Details
Lab Equipment
- soldering station
e.g. ERSA Soldering Station Digital 80A, Farnell 875-259 - lab power supply
(multi-output,0…30V)
e.g. HM7042 Triple Power Supply, Farnell 853-446 http://www.hameg.de/en/product/ps/hm7042.htm - Multimeter
e.g. Fluke 175, Farnell 355-8678 - (optional) Oscilloscope
e.g. Agilent 54622A 2-Channel 100 MHz, deep memory or
Tektronix TDS220, digital,100MHz - pliers
- screw drivers
- Schematic editor, PCB layout &
autorouter software
e.g. Eagle schematic editor, PCB layout software (www.cadsoft.de)
free download for light version restricted to 100mmx80mm and 2 layers
discussion forum at http://www.cadsoft.de/forum.htm (links to newsgroups) - Board production
e.g. with PCB-Pool (www.pcbpool.com) directly from Eagle .brd-files, 10 working days, double side, minimal order 10cmx10cm, about £30 + £7 delivery
Schematics and Board Design
Compiler & Programmer
- CCS-PCM PIC C-Compiler (http://www.ccsinfo.com/picc.shtml)
Farnell: 791-428, discussion forum at www.pic-c.com
Experiments Kit for CCS, Farnell 329-6908 - MPLab (download at www.microchip.com)
- Programmer
e.g. simple start with PICStart Plus programmer, Farnell: 704-740 - Text editor
Software Development / PIC Programming
Chips etc..
MCU - Microcontroller (www.microchip.com)
- PIC 16F628 – low-cost MCU, 16 i/o, no external components
- PIC 16F876 – midrange MCU, large ROM
- PIC 16F877 – midrange MCU, large ROM, many i/o
Novolatile RAM
- Serial FRAM – replacement for
serial EEPROM (www.ramtron.com)
e.g. FM24CL64, http://www.ramtron.com/products/datasheets.htm
Serial Line Driver (convert from TTL to +/-12V)
- MAX232 (4 external capacitors)
- MAX233 (no external capacitors)
http://pdfserv.maxim-ic.com/arpdf/MAX220-MAX249.pdf
RF communication
- BIM2 FM-Transceiver (http://www.radiometrix.co.uk/products/bim2.htm)
- Mini-Low power AM
http://www.rfsolutions.co.uk/products/radio/am.htm
Transmitter: QAMT2-434 (Farnell 309-6580) or AM-RT4-433FR (Farnell 722-5647)
Receiver: AM-HRR3-433 (Farnell 676-585)
Oscillators
- 20MHz Crystal
- basic schematic using inverters and R/C
Load cells and strain gauges
- Load cells 1kg, 50kg, 100kg (http://www.picotech.com/accessories/load_cells.html)
RS components 200kg, 300kg (e.g. RS 414-0859) - Strain gauges (to build load
cells)
e.g. (RS order code 632-180) - FSR (force sensitive resitors, www.conrad.de)
A/D Conversion
- PIC internal (10Bit, 100us)
- External (faster and/or higher
resolution)
e.g. texas instruments (TI) ADS8320 (16Bit)
http://focus.ti.com/docs/analog/analoghomepage.jhtml
e.g. analog devices
http://www.analog.com/technology/dataConverters/adc/index.html
D/A Conversion
- Max517
- …
- or digital potentiometer
Op-amps and instrumentation amplifier
- LM324 (low cost op-amp)
- INA122 (inst-amp)
- INA118 (inst-amp)
- AD623 (inst-amp)
Voltage regulators
- 780X, LDO
- voltage refs
- +/- Voltage modules (e.g. Farnell 200-098)
integrated circuits
- 74HC00
- 74HC01
- 74HC04
- 74HC14
- CD4066
Multiplexer/switches
- 8-1 mux
- analog switch
Misc
- Resistors
- Capacitors
- LEDs
Components
Some protocols of interest
- serial line, RS232 http://www.epanorama.net/links/tele_interface.html#rs232
- I2C - http://www.semiconductors.philips.com/buses/i2c/facts/
- SPI
Protocols
Computing Department
Engineering Building,
Room A13
Lancaster University
Lancaster, UK
LA1 4YR
Tel: +44 (0) 1524 593786
Fax: +44 (0) 1524 593608
E-Mail: albrecht@comp.lancs.ac.uk
Web:
http://www.comp.lancs.ac.uk/~albrecht/