Hello guys,
Here is something i wanted to do and im confused how to proceed.
Need your expert advice.
Requirement : Need a 32 Digital IO output which can source and sink approx 100mA per output. The output voltage can be in the range 5-18V. There are 3 states - a high state , a low state and an open state. All 32 DIOs can be either an output or an input- (source or sink) and i need to configure it from my Windows PC. The solution im looking for need to be within 150 USD or a max of 200USD. The rpice is excluding the power supply.
My thoughts:
Use an Arduino board and expand the digital out to 32 with shift register. Pass it through a darlington pair and then a analog crosspoint switch.
Challenges: a. Crosspoint switch which can handle 100mA per output.
b. Handle high, low and open with one switch.
Please advise.
jis
DIO
Re: DIO
jismagic,
Sorry about the REALLY slow reply. Sorry to sound like a broken record but phpbb is kind of nightmare for me in the back end.
Did you find the chip/s of your dreams?
Or roll your own solution. I would have started looking at tri-state buffers,
seems like there must be something out there. Hooking up half bridge drivers would probably have been the next step.
Paul
Sorry about the REALLY slow reply. Sorry to sound like a broken record but phpbb is kind of nightmare for me in the back end.
Did you find the chip/s of your dreams?
Or roll your own solution. I would have started looking at tri-state buffers,
seems like there must be something out there. Hooking up half bridge drivers would probably have been the next step.
Paul