Posted: Wed Jun 25, 2008 3:50 pm
My initial Master board design will have an onboard lm335 temp sensor input, where the actual sensor can be put were you like, I will bury mine in middle of my pack to get an overall pack temp.
It will also have an input for the slave data bus obviously.
An output to initialise the slave data cascade which connects to slave 1.
An onboard piezo audible warning device.
A 2 pin output for a off board led warning indicator.
A 3 pin output for the serial LCD display.
A 3 pin input for onboard programming (Software upgrade)
A 3 pin isolated current sensor input probably based on a hall effect device.
A 2 pin opto isolated pwm output to control charger.
An onboard micro reset switch in case of hangs during use/testing
A 2 pin input for a conrol switch to be used with the software to select functions /menus etc on lcd.
It will operate from the 12v vehicle aux supply either switched with the ignition or independently. So charging can take place with vehicle ign off.
It will also have a 2 pin opto isolated drive inhibit output so can't be driven while charging from mains.
Also have a 2 pin 12v relay output to control fail safe charger cut off.
Might add more as we go. I'll try and transfer my basic schematic from paper to PC this week.
It will also have an input for the slave data bus obviously.
An output to initialise the slave data cascade which connects to slave 1.
An onboard piezo audible warning device.
A 2 pin output for a off board led warning indicator.
A 3 pin output for the serial LCD display.
A 3 pin input for onboard programming (Software upgrade)
A 3 pin isolated current sensor input probably based on a hall effect device.
A 2 pin opto isolated pwm output to control charger.
An onboard micro reset switch in case of hangs during use/testing
A 2 pin input for a conrol switch to be used with the software to select functions /menus etc on lcd.
It will operate from the 12v vehicle aux supply either switched with the ignition or independently. So charging can take place with vehicle ign off.
It will also have a 2 pin opto isolated drive inhibit output so can't be driven while charging from mains.
Also have a 2 pin 12v relay output to control fail safe charger cut off.
Might add more as we go. I'll try and transfer my basic schematic from paper to PC this week.