Preston Burns Moore

I was browsing the aisles of Harbor Freight a few months ago and noticed 6.5 horsepower engines for a little over $100. I had no idea what I would do with it, but I went ahead and purchased one anyway. I got the motor to the house and it sat on my desk for a week before I decided I needed a mini bike. Why a mini bike? Well, because I never had one as a kid and I had a motor on my desk.

I did some research on the net and found several sources for mini bike kits, but the prices were a little too high. I browsed over to craigslist and found a "Lil' Indian" rolling frame advertised by a local seller for $100 bucks. I responded to the ad and the frame was in my garage in no time. The frame was nice and straight with no bends, but needed a good cleaning and another coat of paint. I completely stripped the frame of all parts and re-painted it in an afternoon.

I can never keep anything in "stock" configuration. My new engine was no different. I completely dismantled and "hotrodded" it before I even put oil and gas in it. I obtained most of the modification tricks from a few karting websites that use the same engines for kart racing. I won't go into how the mods were done, but here is a list of what I did to my engine.

- Governer/limiter removed
- 1.2:1 rocker arms
- ARC billet aluminum flywheel
- flat-top piston
- GX160 ported 14cc cylinder head
- Mikuni 22mm carbuerator (jetted 130main/12.5 pilot)
- Briggs and Stratton "Animal" intake manifold
- Mikuni pulse-type fuel pump
- 8 degree timing advance
- Exhaust header
- 18 lb. valve springs

The listed mods are pretty standard for the GX200 style engines running in the karting world. The compression ratio is raised from the factory 7.9:1 to around 11.3:1 with the smaller combustion chamber of the GX160 head and the flat-top piston thus making premium fuel a must. I was lucky and experienced no detonation problems with 93 octane fuel. I highly recommend the following websites as they greatly assisted me in this project.

Affordable Go Karts
karting.4cycle.com
oldminibikes.com
GFRT

Click here for photos of the build-up

This is not going to be of interest to many, so I will keep it short. My dad gave me a D-Link DWL-800AP+ wireless repeater which he attempted to set up years ago without success. I really had no use for it, but I stumbled onto a post about converting the unit into a wireless bridge. The conversion only requires a firmware change. It has an 802.11b radio, but that's ok for low bandwidth devices such as printers. Click here for the firmware and instructions.


7/1/2008 - Someone sent me an email and said the link to the firmware was broken. I searched and found it again:

http://www.seattlewireless.net/dwl800ap%2Bhack

Here is a link to the firmware:

ftp://ftp.prestonmoore.com/download/firmware

I got interested in Echolink after doing some work with John Habbinga and seeing his well organized system. I found a simple circuit that I slightly modified for use with the Icom commercial mobiles. The connections to the radio are made with an OPC-617 or compatible cable. Don't let the schematic scare you, It's not that hard to build on a small "perf" board. Pic 1, Pic 2

Catch me on node 360935

12-16-07
Just wanted to show how small you can build the interface:

I was recently contacted with a request for a cable to interface an APRS tracking module to an Icom mobile radio. I had prior knowledge of the subject after reading about a group experimenting with 9600 baud UHF APRS using Icom radios and Kantronics TNCs. I did some research and found that the interface connections for most popular APRS tracking modules and packet radio TNCs are the same. The logic connections are generally made through a single DB9 connection which also can be used to supply power the tracker or TNC. I thought this would be great because it allowed for a single point connection to the Icom radio without the need of seperate TNC power wiring. The result of this project was an interface cable which allows for logic and power connections using a single cable and the option of remote ignition control of the radio and TNC/tracker (GPS also). The listed parts below is what I used to get my APRS tracker on the air.

Parts List
Icom IC-F121S (also the "F" jumper mod)
OpenTracker+ kit (easy to assemble.)
Deluo GPS unit (you need the adapter also)
Interconnect cable
Null-modem cable (used for programming only)

Works like a charm! Click here to track my car live using GoogleMaps. The entire system is "plug and play" and does not require any technical knowlege to configure.

Also, the interconnect cable works great on the Kantronics KPC3+



In order to power the Kantronics KPC3 via the DB9 connection, the jumpers must be configured on the main board. I searched the internet and could not find any guides on how to do this. At any rate, the pic below shows proper jumper setting to power the TNC through the DB9 connector.

I needed a way of keeping an eye on the conditions at my ranch. I built a system that sends images every hour to a server in Houston. Click on the live thumb to the left to check out the current conditions. I did this by using an old Dell Optiplex and an Olympus D-460Z camera. The camera is mounted in the window and the server on the floor. The camera snaps a 1.3 megapixel shot every hour from 7a - 7p with the help of PhotoPC software. The software pulls the image from the camera and saves it to the hard drive. The image is resized with ImageMagick and time stamped with jdatestamp. The dialup modem connection to Valley Telephone is established with wvdial and the 100k image is sent to the Houston closet server via FTP. The cycle takes about five minutes to complete. If you check back around 7p CDT you might catch some wildlife like these wild hogs.

I'm sure that most people in the networking world are aware of the m0n0wall open source firewall project. The m0n0wall package really shines when teamed with an embedded computer such as those from Soekris Engineering. I had a spare Soekris Net4521 left over from a rural wireless project that I decided to use to guard the newly formed Burns Ranch network. As you will see, there is very little to installing the m0n0wall package on the Soekris 4521 single board computer.
Parts List

Soekris Net4521 SBC
Compact Flash card (8 megs or more)
m0n0wall "net45xx" image
physdiskwrite utility

Installation

Installation is very easy and you can be up and running in five minutes. First, make sure you have a copy of the m0n0wall image and the physdiskwrite utility on your Windows desktop. Plug in your card reader and insert your Compact Flash module. To copy the m0n0 image to the CF card, you simply "drag" the image and "drop" it onto the physdiskwrite utility icon. This should cause the utility program to spawn a windows shell which will allow you to choose the destination of the CF card. Choose the destination associated with your CF card and the utility will transfer the image in a flash. This completes the software installation.

Plug the CF card into the Soekris board and connect a ethernet cable between the LAN port of the 4521 and the browser equipped computer. The LAN port on the Soekris will be the port nearest the serial port connector (see the above photo, marked "L"). You can now fire up your browser and point it to "http://192.168.1.1" to configure. The default user is "admin" and password is "mono".

It doesn't get any easier than that!

I'm sure a lot of people have heard of the FON internet access system. If you haven 't heard of FON, click here to hear from the CEO of the company. After you review the video, you will see what the general plan is and will have been introduced to the "La Fonera social router." As many already know, the La Fonera routers were available a couple of years ago for $5 and were even given away for free in San Francisco. I ended up buying one of the $5 La Fonera routers after reading an article at the "Nerd Vittles" website. I installed the router at the house and patiently waited for my clients to start making me rich. Well, two years later I was still waiting for my first customer.

I never had a single user for the entire two years I had my La Fonera connected. Granted I live in a residential area, but I would have assumed with all the new construction around me I would have had at least one client. Ok, not big deal. I still have the Linksys-built, La Fonera router that only set me back five bucks. The problem was the original FON firmware is very limiting. A Google search found that the La Fonera could be reflashed with the wildly popular DD-WRT firmware.

I also found that a serial port could be added to the La Fonera in basically the same manner described for the Linksys WRT-54G. I didn't expect to gain much by adding a serial port to the La Fonera, but mainly just wanted to experiment. I planned to use a Compsys serial port kit left over from a project that never got off the ground.

Adding the serial port is pretty easy. I just followed the Rod Whitby guide and made a few changes to the connections. I also made my connections to the rear of the header pins. The use of a Dremel tool made quick work of mounting the 9-pin connector in the case. The Comsys serial board will fit inside the case as the pictures show. The easiest way to insulate the board is just to wrap it in electrical tape. You can then button up the case, fire up your favorite terminal program, and see if it works. Don't forget your port settings will be "9600-8-N-1" with the stock FON firmware.

Flashing the DD-WRT firmware is simple with the added serial port. I followed the guide found here at the DD-WRT WIKI. The baud rate setting will need to be changed to 115200 after flashing to DD-WRT. The screenshot on the right is of the Windows HyperTerminal program and shows the command-line login screen after the DD-WRT flash. Also note the screenshot shows the "cpuinfo" of the La Fonera.

The modifications to the La Fonera router turn what would be a very limited piece of hardware into something that is usable. The device is limited by its single ethernet port, but I intend to mainly use mine for creating a wireless bridge.