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{ Category Archives } PIC

xBee ZNet 2.5 ongoing serial problem fixed

I have had an ongoing problem with the xBee’s for some time. It goes something like this:
Setup:
xBee ZNet 2.5 in API mode using sleep’s.
Problem:
Periodically (aren’t they always the worst!) the xBee would not perform some of the functions that I asked it to. For example, it did not like sending AT commands after [...]

Pic Development on Ubuntu

I am about to try PikLab with SDCC (Both available via Synaptic Package Manager) and an ICD2.  To install the IDC2 I followed this tutorial.  It’s supposed to be for the Pic Kit 2, but its just about the same for the ICD2.  SDCC also requires GPUtils, so install that too.
One problem so far is [...]

Phased array V0.1 Finished :D Doesnt Work :(

I have implemented a new microcontroller that has simultaneous sampling and a slightly higher sampling rate. I could then interpolate the data with pretty good results using a simple padding + band pass filtering technique. The higher the SNR the better it worked.
However, I have hit a great big wall. It all [...]

Phased Array Data

Got the first incarnation of the Phased array working now. Had a few hiccups along the way, but managed to get most of them sorted. Main problems included not having enough RAM to store a significant amount of data, so I fixed that using a simple compression technique (I say simple, took me [...]

More thoughts, keep changing my mind!! - Inked

Still havent had any time to do anything yet but:
Ive decided to run multiple IR modules off one 18F pic then:
I can have a proper multi-master I2C configuration which means proper interrupts.
The IR module will now be smaller/cheaper because of the lack of another pic
Could put some extra fuctions on it too, like voltage/current monitoring [...]

Status of the ZBot

Ive finally had some time to do a little work on this projct.  Being someone that wants everything done right, and to learn, do everything by myself, where it would normally take a weekend to knock some crappy robot together takes a little longer!
Firstoff, I have treated myself to a Robo Jr Chassis from www.active-robots.com, [...]

Start of the ZBot

Basically want to create a cluster of robots using a mesh’ed ad-hoc network. This will be done using zigbee, but the problem is that I havent created any robots before so I will have to go through the motions before I get to the zigbee part.
So far I have created a primitive IR proximit [...]