8 Battery Lead Acid Slave Board
Posted: Sat Jan 22, 2011 4:27 pm
This board is for 12v lead acid batteries. The board can look after up to eight batteries. I will be making a master board which will allow the connection of two slave boards, this means up to 192v packs will be usable.
The main bits are summarised as follows:
1. Fibre optic communication for the master bus. This should eliminate interference as my car is electrically noisy.
2. Onboard load resistors to shunt 900mA
3. Using precision resistors for the potential divider. No more pesky unreliable pots!
4. Using open source software to develop the board. I'm going for KiCad on linux, power to the penguin!
5. Decent input protection for reliability.
6. I'll try to fit it onto a 100 x 160 eurocard, then it should be easier to find an enclosure (I hope).
7. Still using the trusty Picaxe 08M for the slave board.
Initial schematic is available to view at http://www.dillonworld.co.uk file is called slavemulti.png D33 on the diagram is the led in the fibre optic transmitter.
All comments and suggestions welcomed
Derek
The main bits are summarised as follows:
1. Fibre optic communication for the master bus. This should eliminate interference as my car is electrically noisy.
2. Onboard load resistors to shunt 900mA
3. Using precision resistors for the potential divider. No more pesky unreliable pots!
4. Using open source software to develop the board. I'm going for KiCad on linux, power to the penguin!
5. Decent input protection for reliability.
6. I'll try to fit it onto a 100 x 160 eurocard, then it should be easier to find an enclosure (I hope).
7. Still using the trusty Picaxe 08M for the slave board.
Initial schematic is available to view at http://www.dillonworld.co.uk file is called slavemulti.png D33 on the diagram is the led in the fibre optic transmitter.
All comments and suggestions welcomed
Derek