Search found 16 matches

by jdboy3020
Fri Sep 11, 2015 3:27 pm
Forum: General Discussion
Topic: Motor as generator
Replies: 5
Views: 1258

Motor as generator

I have an old exercise bike that I would like to fool around with putting on a generator. I think I know that you can use a DC motor as a generator but I have some questions. 1. Does it have to be a permanent magnet motor? 2. As an example, if the stats on an imaginary motor says: 12v. 1amp, 700 rpm...
by jdboy3020
Sun Nov 16, 2014 2:27 pm
Forum: General Discussion
Topic: Beeper chirp
Replies: 9
Views: 1720

Re: Beeper chirp

Thanks for the help guys.
Lenp wrote: Here's a link that will help. http://555-timer-circuits.uk/operation/one-shot.html
That looks like a handy website, would something like that be available as a download so it would be usable for the times you don't have web access?

Lamar
by jdboy3020
Sun Oct 26, 2014 3:33 pm
Forum: General Discussion
Topic: Beeper chirp
Replies: 9
Views: 1720

Beeper chirp

I am helping my friend set up a 12v actuator on his harvester. I am going to set a limit switch to turn on a indicator light when it reaches end of travel. What would be the simplest way to set up a piezo beeper to chirp once every time the light goes on. Maybe there is a beeper for sale that is des...
by jdboy3020
Sun May 05, 2013 2:23 pm
Forum: General Discussion
Topic: electronic dice
Replies: 13
Views: 2267

Re: electronic dice

:eek: What ? Add them together! Can't you just do that in your head. :mrgreen: Yeah it's possible but I would use a microchip. Steve G I've always wanted to get started with micro-controllers, maybe this would be a good reason. Next I need to figure out which. I'm thinking I need a micro that would...
by jdboy3020
Sun Apr 07, 2013 1:04 pm
Forum: General Discussion
Topic: electronic dice
Replies: 13
Views: 2267

Re: electronic dice

Thanks a lot. How complicated would it be to have the to numbers added together, for example instead of showing a 3 and 4 it would show 7? Lamar
by jdboy3020
Sat Apr 06, 2013 4:01 pm
Forum: General Discussion
Topic: electronic dice
Replies: 13
Views: 2267

electronic dice

I've always wanted to have electronic dice but can not find any that output in decimal numbers. How easy would it be to add a circuit to this kit to output to two seven segment LEDs? http://www.ramseyelectronics.com/cgi-bi ... &key=K3400 Lamar
by jdboy3020
Fri Apr 05, 2013 7:39 am
Forum: General Discussion
Topic: alternator question
Replies: 16
Views: 3730

Re: alternator question

Sorry I'm late to the discussion but as an electrical rebuilder your question caught my eye. Alternators can be rebuilt to deliver more amps to a certain degree BUT watch out, more amps mean more heat with the same surface area so that means a hotter running alt. which cuts the life. Also if you twe...
by jdboy3020
Sun Sep 30, 2012 1:03 pm
Forum: General Discussion
Topic: Old N&V Issues!
Replies: 6
Views: 1346

Re: Old N&V Issues!

If you're pitching those issues, please pitch them my way! I'll pay the shipping.
319-679-9865
by jdboy3020
Sat Sep 24, 2011 6:53 pm
Forum: General Discussion
Topic: wireless counter
Replies: 21
Views: 2981

Re: wireless counter

If I read this post correctly, the problem is not in how to measure the rotations but rather how to get the readings from the measured point to the ground. I envision that the turbine is mounted on a bearing assembly that has a concentric air line. The whole turbine is free to rotate to the wind, w...
by jdboy3020
Fri Sep 23, 2011 7:20 pm
Forum: General Discussion
Topic: wireless counter
Replies: 21
Views: 2981

Re: wireless counter

I am assuming that the compressor is in the top thats rotates, if so than the air line has a coupler that swivels. It's a shame the compressor is not stationary and the shaft comes down to turn the compressor. True. Is the shaft to the compressor in the center of the head that rotates? if so then y...
by jdboy3020
Thu Sep 22, 2011 11:21 pm
Forum: General Discussion
Topic: wireless counter
Replies: 21
Views: 2981

Re: wireless counter

sorry I meant 42000 rounds on the counter.
by jdboy3020
Thu Sep 22, 2011 4:54 pm
Forum: General Discussion
Topic: wireless counter
Replies: 21
Views: 2981

Re: wireless counter

If I would use a couple of rare earth magnets on the shaft and a coil to pick it up, do you guys think it would be possible to get enough power from that to transmit a "pulse" from an antenna to a receiver 100' away? The transmitter antenna could not be directional because the head rotates 360 deg. ...
by jdboy3020
Wed Sep 21, 2011 7:34 pm
Forum: General Discussion
Topic: wireless counter
Replies: 21
Views: 2981

Re: wireless counter

Thanks for all the reply's and ideas so far. The wireless bike computer is a good idea that I will have to think about. I'm not so interested about RPM as I am about counting total rounds but it would be an interesting side benefit. Here's my reasoning for counting the rounds: if for example a 13 HP...
by jdboy3020
Tue Sep 20, 2011 10:55 pm
Forum: General Discussion
Topic: wireless counter
Replies: 21
Views: 2981

Re: wireless counter

I already had and discarded the slip ring idea because I figured it would be hard to keep good contact through them over time, especially with low voltage but maybe I'm wrong. Miguel's suggestion about reflective tape and a laser sounded intriguing but the blades don't stay in the same spot as the h...
by jdboy3020
Tue Sep 20, 2011 6:49 pm
Forum: General Discussion
Topic: wireless counter
Replies: 21
Views: 2981

Re: wireless counter

An air compressor/wind turbine is an air compressor mounted on a tower with three blades attached so the wind can pump air, looks very similar to a small electric wind generator. It's a new product on the market made by an Amishman in ME under the brand name "Winpressor".Since on some days it runs a...