Reset button of Servopod

[Yang Dazhi]

Hi,
I am from Singapore.

I was tring to use my new servopod to control some motors. I tried to use Minipod and Isopod before, and they all work just fine. however when I used servopod things go differently.

I could not power up servopod..........

When I turn on the power, there should be "Isomax V0.82" display on the NMITerm screen (It does for Minipod and Isopod). However, there is nothing for servopod.

I tried to use the reset button, things are even stranger.Everytime I touch (not click) the reset button, the line of words "Isomax V0.82" will pop up twice. And then, when i tried to type something. nothing display on the screen, unlike other pods, whatever I type will display in the terminal.

What is going on here, can anyboby help? Thanks in advance.

[gtiani]

Hi Yang Dazhi,
It sounds like your reset button might be faulty. Check it with a meter with the power off. It should read about 10K Ohm open (there is a 10K Ohm resistor in the circuit) and zero Ohms closed. Touching (not clicking) should not reset the ServoPod.
Any chance that the board is resting on a conductive surface and shorting the reset?
Gary

[nmitech]

Hi Yang Dazhi,

What you described is stranged to me as well, cuz i know we tested throughly before we shipped it out. I just talked with my production dept. regarding to your order. He told me, you have one of the ServoPod-USB. So here is what i think. Your pc or laptop USB port does not put out enough power for the ServoPod-USB to operate. To prove this, you can use the external power with atleast 6Vdc @ 350mA, or higher. Connects on PJ1 power jack, or J4 header pin. Also J13 needs to be jumpered on pin 2 & 3 (from center pin toward leds). Besure to power the board first, and plug in the USB cable last, if you decide to use external power.

[RMDumse]

You know, when you touch the reset switch body, you are not touching reset, but ground. The case of the reset switch body is connected to ground. Would touching the ground pins elsewhere produce the same result?

Sounds to me also like a power or ground problem. How are you powering this board? Maybe before applying and external power (I seem to remember your last returned order seemed burned out from being over voltaged) maybe you could read the +5V and 3.3V rails with a meter, to see what is currently on the board.