Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Electronics, Lighting, & Gadgets HRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-01-07, 12:40 PM   #1526
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Bikes: Some silver ones, a black one, a red one, an orange one and a couple of titanium ones
Posts: 17,956
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 157 Post(s)
Quote:
Originally Posted by robtown
I bought that tractor light and sent it back because it was sealed - I couldn't change the bulb. It was also too heavy.
For a nice, small, light light, look for the NiteRider NR 50 Sport. It's made for using with c or d cell batteries. It has only a 5 or 7 W MR-11 bulb in it but it's also pretty cheap...about $50... with the mounting hardware and cable. But you can swap out the bulb for a 15 or 20 W MR-11 (about $3) and have a great light. I use the NiteRider heads all the time and they are very rugged and nicely weather proof.
__________________
Stuart Black
New! Pokin' around the Poconos A cold ride around Lake Erie
New! Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
An Good Ol' Fashion Appalachian Butt Whoopin'.
cyccommute is offline   Reply With Quote
Old 02-01-07, 09:14 PM   #1527
BikeManDan
Senior Member
 
BikeManDan's Avatar
 
Join Date: Jul 2006
Location: Oakland, CA
Bikes:
Posts: 1,300
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
I bought a red xenon flasher from allelectronics and got it today but its light is rather...pink opposed to red.
Is this normal?
Will either exchange it for another red and hope its actually red or get the amber version
BikeManDan is offline   Reply With Quote
Old 02-01-07, 09:27 PM   #1528
sherpa93
Senior Member
 
sherpa93's Avatar
 
Join Date: Apr 2006
Location: Upper Pooristan
Bikes: 1993 Dorado sherpa
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by cyccommute
For a nice, small, light light, look for the NiteRider NR 50 Sport. It's made for using with c or d cell batteries. It has only a 5 or 7 W MR-11 bulb in it but it's also pretty cheap...about $50... with the mounting hardware and cable. But you can swap out the bulb for a 15 or 20 W MR-11 (about $3) and have a great light. I use the NiteRider heads all the time and they are very rugged and nicely weather proof.
Heres the NiteRider NR50 Sport on closeout for $24.99

http://www.speedgoat.com/product.asp?part=108378
sherpa93 is offline   Reply With Quote
Old 02-02-07, 11:29 AM   #1529
uphillbiker
A Serious Mountain Biker
 
uphillbiker's Avatar
 
Join Date: Jan 2007
Bikes:
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
hHh Intensity MR11

OK guys,

I'm sure the answer's all ready in here, but don't quite have the patience to read all 15,000 posts.

If you're buying MR11 bulbs for building your own light or replacing burn out ones, is there any meaning to the phrase "high intensity"? That is, are some halogen bulbs more efficient than others? If so, what is the most efficient halogen bulb out there? Regretfully, I bought a bunch of bulbs 5 W 6 V MR11's from 1000bulbs.com thinking they were all the same.

When applying a greater voltage to a bulb to obtain more performance at the expense of the life, how do you calculate the expected life for the increase in wattage?
uphillbiker is offline   Reply With Quote
Old 02-02-07, 11:58 AM   #1530
acroy
Senior Member
 
acroy's Avatar
 
Join Date: Jun 2005
Location: Dallas Suburbpopolis
Bikes:
Posts: 1,480
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by uphillbiker
OK guys,

I'm sure the answer's all ready in here, but don't quite have the patience to read all 15,000 posts.

If you're buying MR11 bulbs for building your own light or replacing burn out ones, is there any meaning to the phrase "high intensity"? That is, are some halogen bulbs more efficient than others? If so, what is the most efficient halogen bulb out there? Regretfully, I bought a bunch of bulbs 5 W 6 V MR11's from 1000bulbs.com thinking they were all the same.

When applying a greater voltage to a bulb to obtain more performance at the expense of the life, how do you calculate the expected life for the increase in wattage?
I'm no expert at bulbs but i've had very good luck purchasing from lightbulbs05 on Evilbay. I'm running 10w 6v (at 7.2v) and 20W 12volt (at 14.8v) and like them both, good even beam, nice looking, no issues.

As far as longevity, rule of thumb is % increase in volts = % decrease in life. ie 10% more volts = 10 % less light.

7.2v on a 6v rated bulb (20% more volts) should decrease life 20%
acroy is offline   Reply With Quote
Old 02-02-07, 04:20 PM   #1531
uphillbiker
A Serious Mountain Biker
 
uphillbiker's Avatar
 
Join Date: Jan 2007
Bikes:
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hey, thanks again for the help.

I'm really not happy with 1000bulb.com ones for selling me such crappy bulbs compared to those at batteryspace (which are really good if they're similar at all to Nightrider’s). So I'm just going to power the snot out of them on a 9 volt source (bulbs are 6 volt).

Also, there's another question on a slightly different topic. Sorry if there's a better place to ask this question, but have any of you guys tried the Trail Tech 30W HID light?

I just got one and am very happy with it’s initial performance. However, one thing caught my attention is the manufacturer recommends a power source of 12 volts minimum. Now, I know that batteryspace.com sells it with a lithium pack of 11 volts, but still--are there any issues with running these off lithium batteries. I know one thing the bulbs really hate is insufficient voltage, which causes hard ion impacts (or something) and destroys the filament. It seems like you might your lithium pack could get low enough to still have 1/3 or more power left but be at a voltage that cuts down the bulb life.

My goal is to make this bulb last as long as possible and I'll buy a whole new battery if necessary.

What do people think?

Thanks again.
uphillbiker is offline   Reply With Quote
Old 02-02-07, 08:50 PM   #1532
GlowBoy
GN BIKN
 
Join Date: Sep 2005
Location: Portland OR
Bikes: 1990ish MTB converted to 'cross, custom Vulture 29"er, Swift 2-speed Automatix folder, Madsen cargo bike
Posts: 255
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Cheap MR11 bulb woes

Uphillbiker, I have the same question about finding quality MR11 bulbs. I bought a Hikari one (same brand as sold by lightbulbs05) last year, and the beam pattern is awful, with terrible dead spots and bright spots. My primary commuter light is MR16 based, but my MTB light is still MR11, and I'm wondering if there's anything better out there. All the bulbs associated with bike light companies (NiteRider, etc.) are rated for either 6V, 7.2V or 13.2V -- not 12V, and everything else I've found is el cheapo.
GlowBoy is offline   Reply With Quote
Old 02-03-07, 10:20 AM   #1533
kgatwork
Senior Member
 
kgatwork's Avatar
 
Join Date: Jun 2004
Bikes:
Posts: 250
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by uphillbiker
Hey, thanks again for the help.

I'm really not happy with 1000bulb.com ones for selling me such crappy bulbs compared to those at batteryspace (which are really good if they're similar at all to Nightrider’s). So I'm just going to power the snot out of them on a 9 volt source (bulbs are 6 volt).

Also, there's another question on a slightly different topic. Sorry if there's a better place to ask this question, but have any of you guys tried the Trail Tech 30W HID light?

I just got one and am very happy with it’s initial performance. However, one thing caught my attention is the manufacturer recommends a power source of 12 volts minimum. Now, I know that batteryspace.com sells it with a lithium pack of 11 volts, but still--are there any issues with running these off lithium batteries. I know one thing the bulbs really hate is insufficient voltage, which causes hard ion impacts (or something) and destroys the filament. It seems like you might your lithium pack could get low enough to still have 1/3 or more power left but be at a voltage that cuts down the bulb life.

My goal is to make this bulb last as long as possible and I'll buy a whole new battery if necessary.

What do people think?

Thanks again.

I have a trailtech MR16 HID and use a 12 NiMh battery pack that I made from some discarded sub-c cells I found at work. Its a very bright light

It has failed once already, luckily I had my 12v halogen helmet light. I used the light approximately 12 commuter hours when the light failed to stay on for more than 20 seconds. The night it failed I was on a fun ride and had just run the one pack till the cutoff voltage of the light was hit, approximately 10.5 volts under load or 1 hour 10 minutes of run time. When I put the light on a second pack, thats when my problems started. When I got home I put it on a freshly charged pack and a 12v 10Ah SLA battery with the same results. I spoke with a Trailtech tech and RMA'd it back. Turn-around was approximately 1 day after they received the unit. I got it back and they replaced the bulb and installed a re-strike ballast new for 07'. The light seems to be working fine now but I only have about 6 hours on the unit now. Time will tell.
kgatwork is offline   Reply With Quote
Old 02-03-07, 02:02 PM   #1534
BikeManDan
Senior Member
 
BikeManDan's Avatar
 
Join Date: Jul 2006
Location: Oakland, CA
Bikes:
Posts: 1,300
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by dwoloz
I bought a red xenon flasher from allelectronics and got it today but its light is rather...pink opposed to red.
Is this normal?
Will either exchange it for another red and hope its actually red or get the amber version
^^^^ Anyone? Need to know whether to exchange for another or get the amber
BikeManDan is offline   Reply With Quote
Old 02-03-07, 04:33 PM   #1535
DCCommuter
52-week commuter
 
DCCommuter's Avatar
 
Join Date: Mar 2005
Location: Washington, DC
Bikes: Redline Conquest, Cannonday, Specialized, RANS
Posts: 1,929
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by dwoloz
^^^^ Anyone? Need to know whether to exchange for another or get the amber
I don't have the red one, but the amber one is more white than yellow.
__________________
The United States of America is the only democratic nation in the world to deny citizens living in the nation's capital representation in the national legislature. District residents have no vote in either the U.S. Senate or U.S. House of Representatives. www.dcvote.org
DCCommuter is offline   Reply With Quote
Old 02-03-07, 07:21 PM   #1536
ken cummings
Senior Member
 
ken cummings's Avatar
 
Join Date: Dec 2005
Location: northern California
Bikes: Bruce Gordon BLT, Cannondale parts bike, Ecodyne recumbent trike, Counterpoint Opus 2, miyata 1000
Posts: 5,601
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Pink does sound odd. I haven't gotten one of their strobes having used the same Radio Shack amber one for nearly 15 years. Try having a friend with good color vision look at it at night from 40 or 50 yards away. My amber light seems almost white when I am right by it. If it is still pink consider wrapping a few pennies of clear red tape or plastic sheet around it first. If that fails consider getting an amber one, keeping the pinkish one for back-up or run it along with the amber one.
ken cummings is offline   Reply With Quote
Old 02-03-07, 10:05 PM   #1537
fordfasterr
One speed: FAST !
 
fordfasterr's Avatar
 
Join Date: Dec 2005
Location: Ft. Lauderdale FL
Bikes: Ebay Bikes... =)
Posts: 3,375
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
12v solar panel for recharging batteries...

I have been looking on ebay for something to recharge my spare batteries during the day...

Does anyone know of a GOOD and reliable charger that is weatherproof ? , something that can charge a 12v 5ah sla battery?
fordfasterr is offline   Reply With Quote
Old 02-03-07, 10:35 PM   #1538
uphillbiker
A Serious Mountain Biker
 
uphillbiker's Avatar
 
Join Date: Jan 2007
Bikes:
Posts: 107
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Batteryspace has some good size 12 volt solar pannels, including one that is flexible. I don't know which place is the best.
uphillbiker is offline   Reply With Quote
Old 02-04-07, 01:18 AM   #1539
BikeManDan
Senior Member
 
BikeManDan's Avatar
 
Join Date: Jul 2006
Location: Oakland, CA
Bikes:
Posts: 1,300
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
I'm working on making my own blinky now that will run along side a xenon flasher. Thinking of mounting the LEDs just under the saddle

Created a circuit that alternates flashes between two banks of LEDs (plus one acting as a protection diode). Will scale up to a whole lot of LEDs; Im planning to use about 20.
Pretty basic stuff, few transistors and a 555



Video http://www.youtube.com/watch?v=tcUDzX6UaQY
BikeManDan is offline   Reply With Quote
Old 02-04-07, 03:25 AM   #1540
foolish heart
Senior Member
 
Join Date: Mar 2006
Bikes:
Posts: 127
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by uphillbiker

I'm sure the answer's all ready in here, but don't quite have the patience to read all 15,000 posts.
That caught me. I had to look it up. I think it's 1500.
foolish heart is offline   Reply With Quote
Old 02-05-07, 11:57 AM   #1541
fordfasterr
One speed: FAST !
 
fordfasterr's Avatar
 
Join Date: Dec 2005
Location: Ft. Lauderdale FL
Bikes: Ebay Bikes... =)
Posts: 3,375
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Does anyone know of a good led blinker circuit (perhaps on ebay?) that will blink continuously or possibly strobe continuously ?
fordfasterr is offline   Reply With Quote
Old 02-05-07, 12:13 PM   #1542
jeff-o
Recumbent Evangelist
 
Join Date: Mar 2005
Location: Kitchener, Ontario
Bikes: Rebel Cycles Trike, Trek 7500FX
Posts: 2,991
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fordfasterr
Does anyone know of a good led blinker circuit (perhaps on ebay?) that will blink continuously or possibly strobe continuously ?
You can get blinking LEDs... How many LEDS do you want to have flash at the same time (I assume, in sync with each other?)
jeff-o is offline   Reply With Quote
Old 02-05-07, 12:27 PM   #1543
fordfasterr
One speed: FAST !
 
fordfasterr's Avatar
 
Join Date: Dec 2005
Location: Ft. Lauderdale FL
Bikes: Ebay Bikes... =)
Posts: 3,375
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by jeff-o
You can get blinking LEDs... How many LEDS do you want to have flash at the same time (I assume, in sync with each other?)

I currently have a large 4 led trailer tail-light hooked to a 5ah 12v slab. I want to make it flash / strobe all the time...

It is currently just always ON.
fordfasterr is offline   Reply With Quote
Old 02-05-07, 12:44 PM   #1544
jeff-o
Recumbent Evangelist
 
Join Date: Mar 2005
Location: Kitchener, Ontario
Bikes: Rebel Cycles Trike, Trek 7500FX
Posts: 2,991
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fordfasterr
I currently have a large 4 led trailer tail-light hooked to a 5ah 12v slab. I want to make it flash / strobe all the time...

It is currently just always ON.
In that case, you might just want to replace one of the LEDs with a flashing LED, which will make all four LEDs flash at the same time. You need to be able to solder, though.

At least, I'm about 95% sure this is what will happen....
jeff-o is offline   Reply With Quote
Old 02-05-07, 01:52 PM   #1545
fordfasterr
One speed: FAST !
 
fordfasterr's Avatar
 
Join Date: Dec 2005
Location: Ft. Lauderdale FL
Bikes: Ebay Bikes... =)
Posts: 3,375
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by jeff-o
In that case, you might just want to replace one of the LEDs with a flashing LED, which will make all four LEDs flash at the same time. You need to be able to solder, though.

At least, I'm about 95% sure this is what will happen....

the existing 4 LED's are on a pcb with 12v resistors and such...

How would I wire in a regular blinkie LED to that circuit ?
fordfasterr is offline   Reply With Quote
Old 02-05-07, 01:59 PM   #1546
jeff-o
Recumbent Evangelist
 
Join Date: Mar 2005
Location: Kitchener, Ontario
Bikes: Rebel Cycles Trike, Trek 7500FX
Posts: 2,991
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fordfasterr
the existing 4 LED's are on a pcb with 12v resistors and such...

How would I wire in a regular blinkie LED to that circuit ?
Well, you'd desolder one of the LEDs, and replace it with a blinking one.
jeff-o is offline   Reply With Quote
Old 02-05-07, 02:02 PM   #1547
fordfasterr
One speed: FAST !
 
fordfasterr's Avatar
 
Join Date: Dec 2005
Location: Ft. Lauderdale FL
Bikes: Ebay Bikes... =)
Posts: 3,375
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by jeff-o
Well, you'd desolder one of the LEDs, and replace it with a blinking one.

Understood !


Thanks =)

Now, where can I get a bright flashing led to solder in there ?
fordfasterr is offline   Reply With Quote
Old 02-05-07, 02:14 PM   #1548
jeff-o
Recumbent Evangelist
 
Join Date: Mar 2005
Location: Kitchener, Ontario
Bikes: Rebel Cycles Trike, Trek 7500FX
Posts: 2,991
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fordfasterr
Understood !


Thanks =)

Now, where can I get a bright flashing led to solder in there ?
Got any good electronics hobbyist shops in your city? EBay is sure to have what you need, but by the sime you add shipping and stuff it'll be cheaper just to buy another whole light!
jeff-o is offline   Reply With Quote
Old 02-05-07, 02:41 PM   #1549
BikeManDan
Senior Member
 
BikeManDan's Avatar
 
Join Date: Jul 2006
Location: Oakland, CA
Bikes:
Posts: 1,300
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Well here's the schematic I used. Employs a 555 timer IC to pulse the LEDs



It gives a 6V input but you can use any voltage as the input, just need to adjust your resistor values on the LEDs so they don't get too much current
BikeManDan is offline   Reply With Quote
Old 02-05-07, 02:57 PM   #1550
jeff-o
Recumbent Evangelist
 
Join Date: Mar 2005
Location: Kitchener, Ontario
Bikes: Rebel Cycles Trike, Trek 7500FX
Posts: 2,991
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by dwoloz
Well here's the schematic I used. Employs a 555 timer IC to pulse the LEDs



It gives a 6V input but you can use any voltage as the input, just need to adjust your resistor values on the LEDs so they don't get too much current
Yup, that circuit will work just fine. If you only need to drive four LEDs, you can even skip the second LED bank (driven by the 2905), the 220 ohm resistor, AND the 3053 transistor. The 555 timer can drive up to 200mA, ten times what you'll need to run four LEDs.
jeff-o is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:20 PM.