Search found 153 matches

by John Shreffler
Fri Apr 30, 2010 7:19 am
Forum: Electronics
Topic: Light Pollution
Replies: 7
Views: 2464

Re: Light Pollution

Beginning with the F series Judges, the boards have positions for the components. It is easier of course to install Sunlight Max when first building, since to retrofit means tearing up everything inside the Judge and rebuilding. Not just the main board, but all lane station boards. So I charge an ex...
by John Shreffler
Fri Apr 30, 2010 6:58 am
Forum: Electronics
Topic: Light Pollution
Replies: 7
Views: 2464

Re: Light Pollution

Keep in mind that what looks black to the human eye does not necessarily look black in infrared light. Even if it did, placing the emitter or detector or both at the bottom of a deep hole is not going to help. If you are outdoors or under a skylight, or have a glass brick wall, the entire area and e...
by John Shreffler
Mon Mar 08, 2010 8:45 pm
Forum: Derby Products and Services
Topic: Light Tree $5
Replies: 5
Views: 2037

Re: Light Tree $5

Hi, Sporty. Not at the moment. I am planning to do another production run this summer, and might offer some kind of kit next fall.
by John Shreffler
Tue Feb 02, 2010 8:54 pm
Forum: Tracks
Topic: Where to get the pins for BetaCrafts track plating?
Replies: 3
Views: 1371

Re: Where to get the pins for BetaCrafts track plating?

I have some Beta Craft here. The pin size is .125". You could cut up a 1/8" welding rod, (available at tool rental stores) and do a little touch up chamfering with a file. A roofing nail will also work.
by John Shreffler
Fri Jan 29, 2010 10:09 pm
Forum: Derby Products and Services
Topic: New Mounting Blocks for BestTrack
Replies: 0
Views: 1599

New Mounting Blocks for BestTrack

New Directions is now offering a series of improved mounting blocks for attaching The Judge to the aluminum BestTrack. The blocks come in three heights, giving 3.5, 4.5, and 5.5" of clearance. Taller blocks are available on special order. They also come in a variety of finishes: unfinished, primed, ...
by John Shreffler
Thu Jan 28, 2010 9:52 pm
Forum: Electronics
Topic: Microswitch - older Judge timer
Replies: 3
Views: 1540

Re: Microswitch - older Judge timer

I don't recommend micro switches, and supply only magnetic switches with my equipment. Micro switches are not hermetic allowing H2O and O2 to enter. Internally, the BeCu contacts start out bright orange, but slowly turn brown, then black and finally become unworkable for switching very low currents....
by John Shreffler
Thu Dec 31, 2009 10:11 pm
Forum: Tracks
Topic: Derby Magic Track
Replies: 57
Views: 33258

Re: Derby Magic Track

I have not raced on it, but have pieces of it here. It is very nice material. Not sure, but I believe it is ABS. You can see some photos at http://www.newdirections.ws/DerbyMagic.html
by John Shreffler
Thu Dec 17, 2009 8:59 am
Forum: Electronics
Topic: USB to Serial Adapters
Replies: 27
Views: 18534

Re: USB to Serial Adapters

The shell is the same size, but the VGA has three rows of female contacts totaling 15, whereas the serial port has two rows of male contacts totaling 9. The VGA is known as a high density connector, the serial is standard density.
by John Shreffler
Sun Dec 13, 2009 10:18 pm
Forum: Electronics
Topic: USB to Serial Adapters
Replies: 27
Views: 18534

Re: USB to Serial Adapters

A serial interface on a PC is male, 9 pin. You might be looking at a different type of connector.
by John Shreffler
Wed Jun 03, 2009 7:53 am
Forum: Space Derby
Topic: Best Track
Replies: 12
Views: 7395

Re: Best Track

If you use more line tension, you must use more base weight to compensate. My website shows the use of an 8" solid cement block, which weighs over 50 pounds. but that is probably overdoing it. Regarding some lanes showing .0001, that would seem impossible, since there is a common clock. If somehow t...
by John Shreffler
Tue Jun 02, 2009 5:44 am
Forum: Space Derby
Topic: Best Track
Replies: 12
Views: 7395

Re: Best Track

A time of .0001 for all lanes is transmitted by the Judge if it did not receive the start signal. Make sure your magnet is being pulled away from the switch to a separation of at least 1.5". When the Judge gets that signal, it responds by a steady green light lasting 1.0 seconds. You say the track s...
by John Shreffler
Wed Apr 29, 2009 9:23 pm
Forum: Raingutter Regatta
Topic: Electronic timing
Replies: 3
Views: 3271

Re: Electronic timing

The job I did was one of a kind. The electronics were installed in a small box. The sensor and receiver pairs were looking over the top of the gutters at eachother. The boats' sails eclipsed the infrared light beams, and a LED at the end of the gutter showed the results to the audience. Simulataneou...
by John Shreffler
Thu Apr 16, 2009 5:37 pm
Forum: Raingutter Regatta
Topic: Electronic timing
Replies: 3
Views: 3271

Re: Electronic timing

I did one once.
by John Shreffler
Wed Mar 25, 2009 3:18 pm
Forum: Electronics
Topic: Simple finish line circuit help
Replies: 14
Views: 5163

Re: Simple finish line circuit help

hmmm. It seems like it would have been less work to throw away the tower, and just mount the Judge with 4 screws provided. No painting needed. But as long as you are happy, hey, you are happy customer number 4485, owner of the least expensive Judge ever sold. :D
by John Shreffler
Tue Mar 17, 2009 9:31 pm
Forum: Trading Post
Topic: 42 Foot Track For Sale
Replies: 13
Views: 10447

Re: 42 Foot Track For Sale

I have some short pieces of the SuperTimer track here, and think it is really a great running surface. But the pictures of the support structure look like 1" PVC pipe. How stable is the track when it is set up?