BS2p40 carrier

jmalaysia

I've been using a BS2e for a little while for a commercial product.· The end user wants me to add a couple of features,· but unfortunately I don't have enough IO pins to do it.· Switching to a BS2p40 would easily solve that problem,· but I haven't been able to find a suitable carrier board for the it.· I don't mind getting the PDB for programming,· but I want something cheap and friendly in the product,· and would really prefer a programming port on each for modifications.· Any suggestions?

Mike Green

There's no ready-made carrier board for the BS2p40. You'll probably have to design your own. Depending on your I/O needs, you might be able to use some kind of I/O expander like the 74HC595 for outputs or the 74HC165 for inputs along with your BS2e. If you switched to a BS2p, you could easily use any of several I2C I/O Expanders. There are several Nuts and Volts columns that deal with I/O expansion.

RobotWorkshop

I've got a PCB that can be used for the BS2p40 OEM chip itself if you are looking for a way to use to OEM chip.

On the other hand if you want a carrier for the 40-pin module you could just use a generic prototype PCB. There are a lot of choices out there depending upon how you prefer to do your wiring. There really isn't anything too special about some of the carrier boards i've seen anyhow. Just adding a db-9 connector with two .1uf caps will get you the programming port for the BS2p40 module.

Robert