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Re: AD7730 problems
Hi,
I had also problems with avr and spi. The problem is that: if I am using the spi built-in from avr it happened that some time didn't worked because ad7730 requires clock both when sending and reading data. Therefore I made by my self the spi routines and I had no such...
AD7730 problems
Hi again,
Some pcb and schematic considerations:
-keep signal lines between ad7730 and your micro as short as possible
-use decoupling caps for every supply pin as is specified in datasheet for ad7730 and for your micro connect all supply pins to supply line. Decouple each...
Stepper Moror Grounding
If the power supply of the digital part is different from the power supply of the motor and you are not using optos, then you have to connect both grounds together. The best place to connect it's a the stepper motor ground point. Try to avoid grounding loops and take...
ad7710 codevision
Hi,
I didn't understood well what is your problem. In datasheet is specified that is no need to wait between falling edge of rdy and falling edge of cs (page 4 & 36). Anyway if you are using interrupts, there is some time till the read sequence will begin after a rdy falling...
adc+controller interfacing
You asked about ad7730, therefore you already choosed your adc. You can use any microcontroller on the market which have spi and connect it to the adc. That's all you need! All commands are sent via spi interface.
connect ad7730 to avr
First what is the peak-to-peak resolution (no flicker code) that you need for your application? 10bits?
If it's more then 12 bits then you have to take very much care of clean supply, noiseless ground, good decoupling. If you accomplish these items then you have a chance...
avr division
Hi,
Does anyone know a fast method to integer divide 2 long numbers (6 bytes)? I searched on the net and i found one which might apply also for avr
https://www.convict.lu/Jeunes/Math/Fast_operations2.htm
Does anyone implemented or used such kind of methods?
Thanks!
ad7730 site:edaboard.com
this convertor is converting differential voltages, therefore you have to check that the voltages applied to AIN+ and AIN- pins are in the range Vref/2 - input range ... Vref/2 + input range if it's bipolar, and Vref/2 - input range/2 ... Vref/2 + input range/2 if it's...
RS485 problem!
Can you be more specific! RS485 converters are noisy when you are changing between receive and transmit state. Therefore you have to take care with the supply voltage. One solution could be to use a voltage regulator with good load regulation to overcome this issue. Bypass cap...
I made some trials with ir2184 and ir2104 gate drivers and these drivers are working fine also with no load. regarding the boot cap, depending on your total gate input cap of your mosfet you will choose the value for the boot cap. 100nF will be a prefered value. with such boot cap you will keep...
Normally signal conditioners for load cell have thermal compensation. But if you want to build your own signal conditioner from discrete parts it will be a challenge for higher resolutions. I faced also the same problem some time ago when i built my own signal conditioner. Now i am considering...
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