Hey all,
I have been searching for weeks for information about how to make a simple (or not so simple im finding) interface between a vending machine (MDB Plug) and a com port for a pc.
the vending machine MDB Plug has the following connections on a 6 pin plug.
1 = Power Output 34 VCD
2 = Power Return
3 = Not Used
4 = Master Recieve (Min. input current (active) 15 mA @ 1 V)
5 = Master Send (Min. Source current (active) 100 mA @ 4 V)
6 = Communications Common
All i would like to do here is see the data coming from the MDB plug and eventualy write a small program to send data back to the vending machine.
my problem here is im not entirely sure where to even start on a project like this. im new to the electronics side of things and would like some advice more then anything on exactly what im dealing with and where to start out finding the information on a project such as this.
thank you so much for any advice offered.
I have been searching for weeks for information about how to make a simple (or not so simple im finding) interface between a vending machine (MDB Plug) and a com port for a pc.
the vending machine MDB Plug has the following connections on a 6 pin plug.
1 = Power Output 34 VCD
2 = Power Return
3 = Not Used
4 = Master Recieve (Min. input current (active) 15 mA @ 1 V)
5 = Master Send (Min. Source current (active) 100 mA @ 4 V)
6 = Communications Common
All i would like to do here is see the data coming from the MDB plug and eventualy write a small program to send data back to the vending machine.
my problem here is im not entirely sure where to even start on a project like this. im new to the electronics side of things and would like some advice more then anything on exactly what im dealing with and where to start out finding the information on a project such as this.
thank you so much for any advice offered.