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10:15 |
Another attempt at Digital Storage Oscilloscope - CH
Ting
"I gave up on Harry Winter's Dual Incremental Sampling scheme, and
will try a more conventional approach with a high speed ADC. I am coding and
testing the digital components on an Altera Stratix II FPGA. The components are
eP32 controller, ADC, FIFO, and a PLL clock generator. For the display, I will
use a GameBoy Advance console, or a graphic LCD display".
Presentation in PDF available soon
- A/D convertors with 130 msamples/sec are available
- Altera
Quartus
- FPGA development software - $995
- Altera
NIOS
II
development
kit with USB blaster - $2000
- Intellectual
Property available for DRAM, SPI, LCD, keyboard, UART interfaces
- Acquire 2 16-bit A/D data for each 32-bit memory
location
Audio Spectrum Analyzer - CH Ting
Presentation in PDF available soon
- Commercial hand-held audio units available for $400
- Design of a spectrum analyzer using ADuC7020 Forth Stamp
- 22-pin cicuit board available now through
Offete
- New: 8-pin smaller circuit board now available
- Uses microphone purchased from Jameco
- Discrete FFT in eForth
- 128-point FFT uses 65 cosine and 64 sine terms
- 15 Khz maximum sampling rate
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14:00 |
Interesting Items, Volume 3 - Dave Jaffe
Dave
will continue his survey of interesting newly-introduced microcontrollers, I/O
peripherals, sensors, products, and gadgets that can provide useful and unique
capabilities to Forth embedded systems.
- Presentation in PDF with
weblinks
- Wired article about the development of
the Lego Mindstorms NXT robot kit
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