Search found 153 matches

by John Shreffler
Mon Feb 23, 2009 11:05 am
Forum: Derby Products and Services
Topic: Pinewood Derby Video
Replies: 0
Views: 1600

Pinewood Derby Video

One of my good customers, Gary Woodward, sent me a link to this Pinewood video he just created. Gary's mastery of video editing is quite apparent.

http://www.youtube.com/watch?v=2e-Grr1uf9M
by John Shreffler
Fri Feb 20, 2009 4:33 pm
Forum: Electronics
Topic: Phototransistor sensitivity question
Replies: 12
Views: 6560

Re: Phototransistor sensitivity question

Am I reading the datasheet on that right? 100mA? That does not sound right, but there is a lot of errors in data specs That could be the max current at a low duty cycle pulse. Remember catalog writers are not engineers. They don't have an idea of what specs mean. I use 10 ma of current into my emit...
by John Shreffler
Wed Feb 18, 2009 10:01 am
Forum: Electronics
Topic: Phototransistor sensitivity question
Replies: 12
Views: 6560

Re: Phototransistor sensitivity question

Your photosensor has peak response at 870 nm, so it helps if the emitter is also putting out that light wavelength. For example using Digikey's HSDL-4250-ND should help immensely. Also, only that portion of the light cone that actually hits the sensor does any good. So go for narrow beam focus. The ...
by John Shreffler
Sun Feb 15, 2009 3:51 pm
Forum: Derby Products and Services
Topic: New Product: GrandPrix Start Gate Interface, Model GPI
Replies: 0
Views: 1921

New Product: GrandPrix Start Gate Interface, Model GPI

http://www.newdirections.ws/images/GPI.jpg This interface will trigger all of my start gate mechanisms with a mouse click from within the GrandPrix Race Manager application program, and provides an alternate solution to starting a race. Check out the start gates for various tracks at http://www.new...
by John Shreffler
Thu Feb 12, 2009 7:20 am
Forum: Tracks
Topic: Track purchase advice
Replies: 32
Views: 10349

Re: Track purchase advice

If using John's start gate with a MW timer, then John does need to make a modification to it, so it will not auto reset the gate before the heat is over. I offer a device for MicroWizard or other timers that do not tolerate the re-closing of the start switch prior to cars finishing. You can see it ...
by John Shreffler
Fri Feb 06, 2009 8:29 pm
Forum: Electronics
Topic: Simple finish line circuit help
Replies: 14
Views: 5163

Re: Simple finish line circuit help

My mailing address is on all pages of my web site www.newdirections.ws You will be much happier with infrared detection, nothing touches the cars. Along with center line separation, give me the width of the track deck.
by John Shreffler
Fri Feb 06, 2009 7:16 pm
Forum: Electronics
Topic: Simple finish line circuit help
Replies: 14
Views: 5163

Re: Simple finish line circuit help

Send me the distance between lane center lines and $20 and I will send you a Judge made from left over parts of early years. I don't mean to spoil your fun, and I do like the skill of the woodworking.

Randy: At this price, you can't consider this commercial.
by John Shreffler
Sun Feb 01, 2009 2:26 pm
Forum: Derby Products and Services
Topic: Another New Electric Start Gate Design
Replies: 1
Views: 1266

Another New Electric Start Gate Design

We are now offering a start gate latch that fits most all plywood tracks. Stop by and see it at http://www.newdirections.ws/PTG.htm All of our start gates are designed with our Light Tree in mind. However, they can also be activated with a mouse click while using GrandPrix Race Manager.
by John Shreffler
Mon Dec 01, 2008 9:03 pm
Forum: Derby Products and Services
Topic: Light Tree $5
Replies: 5
Views: 2037

Light Tree $5

I have a quantity of programmed microprocessors that are the heart of my light tree http://www.newdirections.ws/lighttree.htm available at $5 plus $5 S&H. This is an 8 pin chip with an internally programmed oscillator. Just add 5 volts and the pins provide a low-going voltage exactly as the animated...
by John Shreffler
Sat Oct 18, 2008 5:32 pm
Forum: Derby Products and Services
Topic: Another New Product Preview: Electric Start Gate
Replies: 0
Views: 1442

Another New Product Preview: Electric Start Gate

I have developed another modestly priced solenoid gate activator, this one to fit the Piantedosi (now Microwizard) aluminum Freedom track. It is designed to work with my Light Tree for a dramatic start to each race. The web site is at http://www.newdirections.ws/MWG.htm
by John Shreffler
Sun Sep 28, 2008 8:02 am
Forum: Derby Products and Services
Topic: New Product Preview - Remote Controlled Start Gate
Replies: 7
Views: 2594

Re: New Product Preview - Remote Controlled Start Gate

Stan, your point is taken. There is nothing that beats a snap-open gate, so that the pegs are instanteously away from the cars. This approach eliminates the bumper height effect that has engendered a virtual cult following. I have always considered the bumper height stuff as distracting and somethin...
by John Shreffler
Thu Sep 25, 2008 3:14 pm
Forum: Derby Products and Services
Topic: New Product Preview - Remote Controlled Start Gate
Replies: 7
Views: 2594

Re: New Product Preview - Remote Controlled Start Gate

Stan: The toggled solenoid gate was a one-of-a-kind design that I don't intend to make a permanent part of my product line. I hung a picture of it at http://www.newdirections.ws/images/togglegate.JPG To answer your question, no I have not investigated your concern, although I don't think there would...
by John Shreffler
Wed Sep 24, 2008 8:50 pm
Forum: Derby Products and Services
Topic: New Product Preview - Remote Controlled Start Gate
Replies: 7
Views: 2594

Re: New Product Preview - Remote Controlled Start Gate

Hi TAL: Returning the BestTrack gate to the closed position would require a lot of solenoid power. Since somebody has to be at the gate anyway to set the cars, it is not a big deal to [censored] the gate for the next race. Just a flick of the thumb. I did make a gate last week for a 6 lane BestTrack...
by John Shreffler
Wed Sep 24, 2008 7:11 pm
Forum: Derby Products and Services
Topic: New Product Preview - Remote Controlled Start Gate
Replies: 7
Views: 2594

New Product Preview - Remote Controlled Start Gate

I am offering a new electric start gate design, which will be controlled by my Light Tree. For now, it will configured only for the BestTrack. A similar concept for other tracks is under consideration.

http://www.newdirections.ws/BTG.htm
by John Shreffler
Sat Apr 05, 2008 7:10 pm
Forum: Software
Topic: RaceView software discontinued
Replies: 0
Views: 3513

RaceView software discontinued

I note with a bit a sadness that Doug Wilson has dropped out of the Pinewood Derby software market. See www.raceview.com