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ferrousduke
Joined: 31 Mar 2008 Posts: 29 Location: Mumbai, India
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Piezo legs |
Posted: Sat May 17, 2008 3:34 am |
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Hello all,
I want to control a piezo actuator which is based on Piezo leg technology. To achieve precise motion of actuator stud, I have designed an interface to it. the interface comprises of EEprom, ADC, an amplifier and a counter.
EEPROM is programmed with a set of data. its a waveform that will be an input to Piezo leg. 8 bit Counter is used to access eeprom addresses and will be further provided to DAC. DAC will convert it into an analogue value which will be supplied to an amplifier and to the Piezo leg. I m using PIC18F4550. Is it a good way to use PIC as a counter and its internal EEprom for this purpose? how can I implement it ? I need a little help to work with eeprom thing..
here's the image:
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kender
Joined: 09 Aug 2004 Posts: 768 Location: Silicon Valley
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Posted: Sun May 18, 2008 6:12 pm |
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Look up read_eeprom() and write_eeprom() in the manual. If you think that you have (or expect to have) problems using these functions, tell us why.
- Nick
P.S. Please correct me if I'm wrong. LM1876 is designed for driving an inductive load. Piezos are more of a capacitive load.
P.P.S. Out of curiosity - why is the schematic partially in English and partially in Russian? _________________ Read the label, before opening a can of worms. |
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ferrousduke
Joined: 31 Mar 2008 Posts: 29 Location: Mumbai, India
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Posted: Mon May 19, 2008 1:52 pm |
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kender wrote: | Please correct me if I'm wrong. LM1876 is designed for driving an inductive load. Piezos are more of a capacitive load. |
LM1876 is recommended by Piezo manufacturers so I am using it without any considerations.
kender wrote: | Out of curiosity - why is the schematic partially in English and partially in Russian? |
So that english speaking people in this forum can understand the basic schematic. |
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