Guys, I have been doing quite a bit of work with microcontrollers. I thought I'd mention that the BasicX BX24s are more capable than basic stamps by almost every measure. They are faster, have more RAM, do multitasking, and have 10-bit ADCs. I have these interfaced to embedded pentiums with some interesting and powerful results, and also have them interfaced to 12-bit ADC chips. I am right now working on interfacing EEG circuitry, which is very similar to seismic signal processing. I am working towards building a very small EEG data acquisition module using AD620 instrumentation amps and OP-90 op amps for low pass filtering. I will be trying two approaches to data massaging, in one scenario the microcontroller will pass the raw EEG data to an embedded pentium for FFT processing for spectral analyis, and if that works I will try doing the same on the microcontroller itself. In the case of EEG data, 8-bit ADCs are sufficient. If I succeed with the EEG project, I may try interfacing a 16-bit ADC and doing some seismic signal processing. Most of the techniques and components are the same for EEG as for seismic data, so I can probably reuse or adapt a lot of the same code. The EEG software challenge goes further because there are many possible protocols for user feedback as it related to neurofeedback training. -- Doug __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>