Range Finder problem

[jonathanwein]

Hi,
no matter what I do, the range finder ALWAYS returns 0. I followed the assembly instructions, to the best I can. I did receive a different transistor than the one on the assembly tutorial.
can someone please tell me where i can troubleshoot this? or find out what's wrong?
thanks,
jonathan

[simonmonk]

The important thing about the transistor is that it is PNP NOT the more common NPN.

What transistor did you use?

Si

On 17 Aug 2013, at 13:23, jonathanwein notifications@github.com wrote:

Hi,
no matter what I do, the range finder ALWAYS returns 0. I followed the assembly instructions, to the best I can. I did receive a different transistor than the one on the assembly tutorial.
can someone please tell me where i can troubleshoot this? or find out what's wrong?
thanks,
jonathan

—
Reply to this email directly or view it on GitHub.

Simon Monk. http://www.simonmonk.org

[jonathanwein]

Hi,
I used the transistor found in the kit I bought. it says: "2N2907 8529".
I'm a novice at this, and don't really know the difference between PNP and NPN.
what can the problem her? if it isn't the transistor?

thanks,
Jonathan

On Aug 18, 2013, at 1:16 AM, simonmonk notifications@github.com wrote:

The important thing about the transistor is that it is PNP NOT the more common NPN.

What transistor did you use?

Si

On 17 Aug 2013, at 13:23, jonathanwein notifications@github.com wrote:

Hi,
no matter what I do, the range finder ALWAYS returns 0. I followed the assembly instructions, to the best I can. I did receive a different transistor than the one on the assembly tutorial.
can someone please tell me where i can troubleshoot this? or find out what's wrong?
thanks,
jonathan

—
Reply to this email directly or view it on GitHub.

Simon Monk. http://www.simonmonk.org
—
Reply to this email directly or view it on GitHub.

[jonathanwein]

Hi,

Please help me solve this problem with my rang finder. i'm not a technician and have no idea what's wrong.
thanks,
jonathan

Begin forwarded message:

From: yoyo yowtravelblog@gmail.com
Subject: Re: [raspirobotboard] Range Finder problem (#1)
Date: August 20, 2013 10:36:15 AM GMT+03:00
To: simonmonk/raspirobotboard reply@reply.github.com

Hi,
I used the transistor found in the kit I bought. it says: "2N2907 8529".
I'm a novice at this, and don't really know the difference between PNP and NPN.
what can the problem her? if it isn't the transistor?

thanks,
Jonathan

On Aug 18, 2013, at 1:16 AM, simonmonk notifications@github.com wrote:

The important thing about the transistor is that it is PNP NOT the more common NPN.

What transistor did you use?

Si

On 17 Aug 2013, at 13:23, jonathanwein notifications@github.com wrote:

Hi,
no matter what I do, the range finder ALWAYS returns 0. I followed the assembly instructions, to the best I can. I did receive a different transistor than the one on the assembly tutorial.
can someone please tell me where i can troubleshoot this? or find out what's wrong?
thanks,
jonathan

—
Reply to this email directly or view it on GitHub.

Simon Monk. http://www.simonmonk.org
—
Reply to this email directly or view it on GitHub.

[simonmonk]

Hi Jonathan,

That transistor should be fine.

Check the stripboard very carefully for any bridges.

Si.

On 24 Aug 2013, at 20:48, jonathanwein notifications@github.com wrote:

Hi,
Please help me solve this problem with my rang finder. i'm not a technician and have no idea what's wrong.
thanks,
jonathan

Begin forwarded message:

From: yoyo yowtravelblog@gmail.com
Subject: Re: [raspirobotboard] Range Finder problem (#1)
Date: August 20, 2013 10:36:15 AM GMT+03:00
To: simonmonk/raspirobotboard reply@reply.github.com

Hi,
I used the transistor found in the kit I bought. it says: "2N2907 8529".
I'm a novice at this, and don't really know the difference between PNP and NPN.
what can the problem her? if it isn't the transistor?

thanks,
Jonathan

On Aug 18, 2013, at 1:16 AM, simonmonk notifications@github.com wrote:

The important thing about the transistor is that it is PNP NOT the more common NPN.

What transistor did you use?

Si

On 17 Aug 2013, at 13:23, jonathanwein notifications@github.com wrote:

Hi,
no matter what I do, the range finder ALWAYS returns 0. I followed the assembly instructions, to the best I can. I did receive a different transistor than the one on the assembly tutorial.
can someone please tell me where i can troubleshoot this? or find out what's wrong?
thanks,
jonathan

—
Reply to this email directly or view it on GitHub.

Simon Monk. http://www.simonmonk.org
—
Reply to this email directly or view it on GitHub.

—
Reply to this email directly or view it on GitHub.

Simon Monk. http://www.simonmonk.org

[sgriset]

Simon not sure if you still checking since this is an old board. Give the form factor of my robot project I want to use LV-MaxSonar-EZ and not the HR-SR-04, so I moved back to the version one of your board I got several years back from Sparkfun. I have setup your inverter circuit on a breadboard using PNP 2N3906 transistor. The problem I'm having is I get the following error when running the program:
File "/usr/local/lib/python2.7/dist-packages/serial/serialposix.py", line 289, in open
self.fd = os.open(self.portstr, os.O_RDWR|os.O_NOCTTY|os.O_NONBLOCK)
OSError: [Errno 2] No such file or directory: '/dev/ttyAMA0'

Any suggestions on troubleshooting this would be greatly appreciated

Thank you in advance for your help