woodylv
Can anyone help me.
I am having an issue where I am using a TTL serial board with a Micro USB that is connecting to the EZB instead of the blue tooth.
I am having issues where I am connected and things are all good but then sometime it spontainiously disconnecting or unable to connect.
Sometimes if I switch usb ports it connects but will disconnect really quick.
Here is a brief description of my setup.
EZB v3.5 board
Micro USB to TTL Serial Adapter board
Sabretooth 25 amp Motor Controler setup as serial connected to 2 jazzy scooter wheels (Setup as my Movement panel)
L298 Motor controler setup as Digital on /off controling 2 actuators for the arms.
Power is provided by 2 12v gel batteries connected to a inverter for the adapters (Reason for the adapters is that some of the AV equip needs special power)
new USB Cable
Power to the EZ B is provided from the USB adapter and also a 12v 2A ac adapter.
Blue Tooth Adapter connecting a sony playstation Navigator controler.
As a Note of interest I have had this exact setup other then the playstation controler working in another bot with no issues.
The only difference is that I am using 12v before I supplied 5v to the EZB.
Any Advice would be greatly appreciated.
I need to get this done by Thursday. Thanks as always to the great EZB community
If I'm reading this right you were only feeding the EZB 5vdc? I think that's may be to low. I feed 12vdc to all my EZB's and have never had a power porblem. These little control boards will accept up to 17vdc. As mentioned, try a power supply instead of your battires to see if that solves your problems. Also make sure all your connections and wires are tight and true.
@wodylv, Correct, the board will only pull the amps it needs. Only thing with high amps is be really careful making your connections and not arcing or you can easily blow things up.
Alan
Hey guys i just thought of something we encountered in another thread, remember that you won't need the VCC connection from the serial adapter plugged into the EZ-B as the computer and EZ-B will both be supplying 5V at that point so it may be causing issues as they both try to provide a stable 5V to the circuit. I would just remove that connection and keep the computer 5V and EZ-B 5V separate, grounds still need to be hooked together though.
Thanks for the great info guys and I will let you know how it goes tonight.
I am definitely separating the 5 volts from the computer and I am going to run the 12v right from the batteries to the EZB.
Worse comes to worse I still have my Bluetooth mod that I can use but my sony PS3 controller hijacks one whole blutooth adapter so I will need to add another.
And I am going to run my ground from the sabre tooth directly to my negative terminal.
The L298 uses the 12V from the battery for power and logic so I am assuming that the negative on that is already the ground.
Thanks again everyone for your input. It has to be something stupid I am sure.
mine would not connect to EZB when the diode on the pc was not soldered in the circuit. But, these other guys are probably right about the voltage and you should get yourself some BUCK regulators if you are going to drive servos.
you might want to re-seat your chips in their sockets.
my 2 cents.