Adrian B.
Mar 20, 2007, 04:54 AM
Hi Guys,
I'm looking for some input into a circuit I would like to put together. I usually hang around the slope forum and have done some composite building of slope airplanes, the latest being a Jart.
The wings get vacuum bagged and here lies my requirements. The vacuum switch I am using is a low pressure differential mechanical switch. I would like to build a digital version. Just to set the scene, the last time I built a microcontroller it was an Intel 8bit controller, used EPROM's to store the code and flash memory was a pipe dream, so please bear with me while I play catch up. :confused:
Requirements:
The circuit needs to read the current Vacuum in inches of Mercury and Milli bar, display current Vacuum level on an LCD display. Should also be able to set a maximum and minimum threshold that will control the vacuum pump through a relay. would also be nice to be able to log and output a graph to a graphical LCD
Ideas so far:
I am planning on using an MPX4100 absolute pressure sensor. I am looking for ideas on what Micro to use and what A/D I should use. Alternatively use a Micro with a built in A/D.
Any ideas would be appreciated.
I'm looking for some input into a circuit I would like to put together. I usually hang around the slope forum and have done some composite building of slope airplanes, the latest being a Jart.
The wings get vacuum bagged and here lies my requirements. The vacuum switch I am using is a low pressure differential mechanical switch. I would like to build a digital version. Just to set the scene, the last time I built a microcontroller it was an Intel 8bit controller, used EPROM's to store the code and flash memory was a pipe dream, so please bear with me while I play catch up. :confused:
Requirements:
The circuit needs to read the current Vacuum in inches of Mercury and Milli bar, display current Vacuum level on an LCD display. Should also be able to set a maximum and minimum threshold that will control the vacuum pump through a relay. would also be nice to be able to log and output a graph to a graphical LCD
Ideas so far:
I am planning on using an MPX4100 absolute pressure sensor. I am looking for ideas on what Micro to use and what A/D I should use. Alternatively use a Micro with a built in A/D.
Any ideas would be appreciated.