Let's Make Robots!

Error-hardware not found?

Hey LMR,

this is probably some silly thing i missed but i kinda need the answer fairly quick so, uuhh...ya

I'm getting close to finishing my start here robot and i need to get the servo to centre position... (I'm using the usb cord and windows vista basic). I downloaded the picaxe programming editor and the drivers for the usb cord and the cord is showing up when i go to options> serial port>com 4. But when i plug in my picaxe 28x1 to the usb and press check firmware this shows up: 

Hardware not found on com 4:

Possible causes:

1) Hardware  not connected 

I'm pretty sure it is, unless the usb cord is broken, but i JUST bought it so it shouldn't be...

2) Hardware not powered

It should be, i'm using 3 non-rechargebles (1.5 volts) and a dead battery, does that work? Also, i've checked the connections, i think that there ok, but i'm not a great solderer...

3) Hardware needs a reset

Which iv'e done like 10 times...

So i'm stumped.. As i said, i need some possible solutions pretty quick, so if you could help that would be great! thanks


Edit: Here's a photo of my picaxe, hope it helps!

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Ya i'm using the picaxe programming cable, i bought it with the Start here kit...

right now im letting a friend borrow my multimeter, so i cant use it... On the outside of the batteries i'm using they all say 1.5 volts and i've got a battery tester that says that they have power in them...

Thanks!, if you have any other ideas please tell me...

Well, your set up with a copper pipe to complete the battery circuit seems suspect to me. Can you hook the output wires of the battery holder to something that will definitely show you are getting voltage? Like a motor or a 5V lamp or an LED with a 330 ohm resistor in series?

No that doesn't seem to be the problem, i put in some copper pipe and its still not showing up, thanks tho.... Any other ideas?

Do you have a multimeter or other way to verify the power from the batteries is at least 4.5V?

Is the USB cable you are using the Picaxe programming cable? This is a specific cable that translates the USB signal to and inverted serial signal that the Picaxe uses. If you are using a normal USB to serial cable, it will not work.

Kk thx,that might be the problem...I'll check it out...

"i'm using 3 non-rechargebles (1.5 volts) and a dead battery, does that work?"

Nope, won't work. Although you'll get a voltage equal to the sum of all 4 batteries, the dead battery will have a large internal resistance, which will limit the current able to flow through the circuit. Get rid of that dead cell, and use batteries with the same remaining charge where possible.