Modifying Vistalights

Quoted post said:

Originally posted by Gags
A mate of mine is a self confessed "anal retentive roadie" who is dead against riding anything other
than a road bike. He has two identical frames ("Mausser" i think), one of which he uses to commute
and one to race.

He is also right into having all of his attachments as neat as possible and so recently he asked me
to shorten one of his light leads. This was a pretty simple job......basically just cut out the
"curly bit" in the middle of a standard Vistalight cable, re-solder wires, wrap with black heat
shrink. It now runs straight from the "Nightstick" (that I recently repacked for him using 3000mAh
NiMh cells), up the frame and to the light.....looks really neat.

He also asked me to see what I could do with an old Vistalight rear LED flasher (one of the
rectangular ones with 5 LEDs and a yellow rubber cover on the switch) as he wanted it to be
brighter. Basically he is going to mount it on his Zefal rear mud guard (One of the gucci curved
ones) for use when commuting in the wet.

Anyway, I went to Jaycar and bought 5 red LEDs at 4000mcd (only $1.00 each) and put them in
tonight (not sure of beam angle but they are pretty tight). It is now retina burning bright (I am
still seeing spots). I put it on outside and it throws a red "torch like" spot on the side of the
house from at least 15 metres away. I am going to give it to him tomorrow and i reckon he is
gonna love it.

At Jaycar, they also had some 20,000 mcd red LEDs (the brightest I have ever come across in 5mm
LEDs) but I think they have a forward voltage of over 3V.

Might be the basis for my next home made rear light.....my only concern being that if it is too
bright, it might draw the eye of drivers too much in my direction (like when you are riding
single-track and actually look at a rock or ditch on the trail, you usually end up hitting it).

Could be a good laugh as front lights for a "Stealth Mode" trip down some single-track though.

Gags

Hi Gags,
Can i ask from where did you get the cells to re-pack the nightstick? Was it difficult or not really? Im thinking of doing the same thing...

Cheers,
Troy

Interestingly, for car tail/brake lights there is ADR49 which specifies how bright they must be and
at what angles they must throw light.

For a bike the road rules just say "visable from 200m"

Al.

Gags said:

A mate of mine is a self confessed "anal retentive roadie" who is dead against riding anything
other than a road bike. He has two identical frames ("Mausser" i think), one of which he uses to
commute and one to race.

He is also right into having all of his attachments as neat as possible and so recently he asked
me to shorten one of his light leads. This was a pretty simple job......basically just cut out the
"curly bit" in the middle of a standard Vistalight cable, re-solder wires, wrap with black heat
shrink. It now runs straight from the "Nightstick" (that I recently repacked for him using 3000mAh
NiMh cells), up the frame and to the light.....looks really neat.

He also asked me to see what I could do with an old Vistalight rear LED flasher (one of the
rectangular ones with 5 LEDs and a yellow rubber cover on the switch) as he wanted it to be
brighter. Basically he is going to mount it on his Zefal rear mud guard (One of the gucci curved
ones) for use when commuting in the wet.

Anyway, I went to Jaycar and bought 5 red LEDs at 4000mcd (only $1.00 each) and put them in
tonight (not sure of beam angle but they are pretty tight). It is now retina burning bright (I am
still seeing spots). I put it on outside and it throws a red "torch like" spot on the side of the
house from at least 15 metres away. I am going to give it to him tomorrow and i reckon he is gonna
love it.

At Jaycar, they also had some 20,000 mcd red LEDs (the brightest I have ever come across in 5mm
LEDs) but I think they have a forward voltage of over 3V.

Might be the basis for my next home made rear light.....my only concern being that if it is too
bright, it might draw the eye of drivers too much in my direction (like when you are riding
single-track and actually look at a rock or ditch on the trail, you usually end up hitting it).

Could be a good laugh as front lights for a "Stealth Mode" trip down some single-track though.

Gags

"Gags" <drgagnon@nospam_ozemail.com.au> wrote in message
"]news:[email hidden]...

Quoted message said:

It now runs straight from the "Nightstick" (that I recently repacked for him using 3000mAh NiMh
cells), up the frame and to the light.....looks really neat.

How did you get the stick apart? I had a go at prying mine (a NiCd one) apart with a screwdriver, so
that I could replace the cells with NiMH ones, but couldn't get the caps off.

Regards,

Suzy

"Suzy Jackson" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

How did you get the stick apart? I had a go at prying mine (a NiCd

one)

Quoted message said:

apart with a screwdriver, so that I could replace the cells with NiMH

ones,

Quoted message said:

but couldn't get the caps off.

They are glued in. Squeezing the casing really hard with pliers seemed to crack the glue bond on
mine and allowed me to pry the lid off with a screwdriver. Or you could put the 'cap end' in a vice
- just below the black plastic end cap - and tighten until you hear a cracking noise. Don't crush
the tube totally! ;-)

Put something in between the pliers and the case, otherwise you will end up with plier teeth marks
in the soft alu.

hth hippy

"troyq" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

Hi Gags, Can i ask from where did you get the cells to re-pack the nightstick? Was it difficult or
not really? Im thinking of doing the same thing...

From the dimensions of the battery pack, I'd lay a bet that they're "sub-c" size. These batteries
are commonly used in radio control cars and cordless power tools, and are available from hobby shops
or Jaycar.

Quite a while ago, I modified an old blackburn mini pump (after seeing the visalight batteries)
along the same lines. See groups.google.com.augroupsOpen ↗
8&oe=UTF-8&selm=51Ay9.24750%245u4.75813%40news-server.bigpond.net.au&rnum=3

Regards,

Suzy (who will attack her vistalight battery tomorrow with the vice at work)

Suzy is right.....They are sub-C cells and you can get them from Jaycar for about $9 each from
memory (you need five for a nightstick). They have solder tabs on each end so it is a relatively
simple job to solder them up. I didn't have any heatshrink big enough to put around the
batteries before slotting them back into the tube, so I ended up with a tightly wrapped layer of
electrical tape.

As for how to get the caps off......I have no idea......my mate gave me the tube with the caps
already off. If you are going to remove the caps, only take out the top one (ie the one with the
connector in it). I actually replaced his connector too with one bought from Jaycar as his old one
was cactus.

BTW Suzy.....love the home made battery stick.......wonder if I could make one out of a full size
pump for a 12V battery.......now that would be a good "dog stick".

Cheers,

Gags

"Suzy Jackson" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"troyq" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

Hi Gags, Can i ask from where did you get the cells to re-pack the nightstick? Was it difficult
or not really? Im thinking of doing the same thing...

From the dimensions of the battery pack, I'd lay a bet that they're

"sub-c"

Quoted message said:

size. These batteries are commonly used in radio control cars and

cordless

Quoted message said:

power tools, and are available from hobby shops or Jaycar.

Quite a while ago, I modified an old blackburn mini pump (after seeing the visalight batteries)
along the same lines. See

groups.google.com.augroupsOpen ↗
e=UTF-8&selm=51Ay9.24750%245u4.75813%40news-server.bigpond.net.au&rnum=3

Quoted message said:

Regards,

Suzy (who will attack her vistalight battery tomorrow with the vice at

work)

Gags said:

It now runs straight from the "Nightstick" (that I recently repacked for him using 3000mAh
NiMh cells),

Can you give further details on this ?

What cells did you use ? Can you still use the standrad charger ?

cheers, -kt

"kingsley" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Gags said:

It now runs straight from the "Nightstick" (that I recently repacked for him using 3000mAh NiMh
cells),

Can you give further details on this ?

What cells did you use ? Can you still use the standrad charger ?

cheers, -kt

I used 3000mAh NiMh Sub-C cells with solder tabs attached that I bought from Jaycar (They don't
actually have a brand written on them). The standard charger is no problems to use, you just need to
allow longer if you have discharged the battery further.

From memory, I think that the wall plug type charger that my mate has is rated at 500mA........If
you were to drain the battery completely (not recommended as this shortens battery life, should turn
off lights as soon as you notice them getting dimmer), You would need 6 hours charge time to fully
recharge it. (ie. 6 x 500mAh = 3000mAh - that is assuming 100% efficiency which doesn't happen). In
reality, you should allow some extra charge to make up for any inefficiencies in the charging
process (heat mainly).

Also can do rough calculation depending on run time......10Watt light at 6V draws 10/6 = 1.66 Amps =
1666 mA. So if you run this light for 1 hour, you have used up 1666mAh of battery capacity and so I
would then put battery on charge for about 4 hours = 2000mAh, which should ensure that the battery
is fully charged without causing too much damage from overcharging.

The chargers provided are "dumb" chargers in that they don't sense when a battery is fully charged.
I am currently working out a design for a smart charger that can basically charge a NiMh battery
pack of any voltage using an initial fast charge, that then switches to a trickle charge once
battery is fully charged. This will allow me to simply hook up my battery and leave it connected
until I am ready to use it next time. I am planning on using a PIC as the basis of my charrger.

I know that you can buy chargers like this off the shelf (pretty expensive though), but where is the
fun in that????

Cheers,

Gags

"Gags" <drgagnon@nospam_ozemail.com.au> wrote in message
"]news:[email hidden]...

Quoted message said:

"kingsley" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Gags said:

It now runs straight from the "Nightstick" (that I recently repacked for him using 3000mAh
NiMh cells),

Can you give further details on this ?

What cells did you use ? Can you still use the standrad charger ?

cheers, -kt

I used 3000mAh NiMh Sub-C cells with solder tabs attached that I bought

from

Quoted message said:

Jaycar (They don't actually have a brand written on them). The standard charger is no problems to
use, you just need to allow longer if you have discharged the battery further.

From memory, I think that the wall plug type charger that my mate has is rated at 500mA........If
you were to drain the battery completely (not recommended as this shortens battery life, should
turn off lights as soon

as

Quoted message said:

you notice them getting dimmer), You would need 6 hours charge time to

fully

Quoted message said:

recharge it. (ie. 6 x 500mAh = 3000mAh - that is assuming 100% efficiency which doesn't happen).
In reality, you should allow some extra charge to make up for any inefficiencies in the charging
process (heat mainly).

Also can do rough calculation depending on run time......10Watt light at

6V

Quoted message said:

draws 10/6 = 1.66 Amps = 1666 mA. So if you run this light for 1 hour,

you

Quoted message said:

have used up 1666mAh of battery capacity and so I would then put battery

on

Quoted message said:

charge for about 4 hours = 2000mAh, which should ensure that the battery

is

Quoted message said:

fully charged without causing too much damage from overcharging.

The chargers provided are "dumb" chargers in that they don't sense when a battery is fully
charged. I am currently working out a design for a smart charger that can basically charge a
NiMh battery pack of any voltage using an initial fast charge, that then switches to a trickle
charge once

battery

Quoted message said:

is fully charged. This will allow me to simply hook up my battery and

leave

Quoted message said:

it connected until I am ready to use it next time. I am planning on using

a

Quoted message said:

PIC as the basis of my charrger.

I know that you can buy chargers like this off the shelf (pretty expensive though), but where is
the fun in that????

Cheers,

Gags

Is this the battery? (May have to cut and paste URL...)

STOCK-CODE: SB1710 - Limited RRP: $12.95 Qty 1+ $12.95 Qty 10+ $11.35 Qty 20+ $10.35

4/3 A 3000mAH Ni-Mh

As used in laptop battery packs. Size 67 (L) x 17 (dia)mm Charging: Standard 600mA for 7 hours Fast
3000mA for 1.2 hours Supplied with solder tags

Are they 1.5V?

Thanks,

Tim

Quoted message said:

The chargers provided are "dumb" chargers in that they don't sense when a battery is fully
charged. I am currently working out a design for a smart charger that can basically charge a NiMh
battery pack of any voltage using an initial fast charge, that then switches to a trickle charge
once battery is fully charged. This will allow me to simply hook up my battery and leave it
connected until I am ready to use it next time.

A wide variety of fully automatic chargers of this sort are available from hobby stores for remote
controlled gadgets. You can pay anything from about $70 to over $300 for one that will handle Pb,
NiCad, NiMH and Lion/LiPoly. The one we have ($75) will charge any size packs of NiCad and NiMH from
1 to 10 cells at a user-selectable rate from about 100mA to ~6A. Needs a (separate) 13.6v supply...

You might find the design more challenging than you think. These things are usually microprocessor
controlled and use a variably pulsed charging strategy to detect the battery size, type, charging
response, and also monitor battery temperature...

"Tim Jones" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Is this the battery? (May have to cut and paste URL...)

Quoted message said:

Size 67 (L) x 17 (dia)mm

Nope. Five of these in a line would be 335mm long, a tad longer (and skinnier) than the
vistalight tube.

On the other hand, these ones:

Will do quite well. Sub C 2700mAh, 43mm long, 23mm round. $9 each.

FWIW, radio control toy cars use Sub-C batteries up to 3000mAh, such as:

www2.towerhobbies.comwti0001pOpen ↗

Though you pay a real premium for that extra few hundred mAh.

Quoted message said:

Are they 1.5V?

No, they're 1.2V.

Regards,

Suzy

Gags said:

BTW Suzy.....love the home made battery stick.......wonder if I could make one out of a full size
pump for a 12V battery.......now that would be a good "dog stick".

A few months ago I was looking at the aluminium mouldings(?) (extrusions?) in the hardware store.
They have some fairly neat alu pipe that might be ideal for a pump-sized battery. Not sure how you
would seal the ends though.

I wouldn't mind a battery that would last the week with the 15 watter. It's not the charging that's
the problem, it's remembering to do it. Funny the way the power always drops out coming down the
hill just before the pot-holes...

-kt

"kingsley" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Gags said:

BTW Suzy.....love the home made battery stick.......wonder if I could

make

Quoted message said:

Quoted message said:

one out of a full size pump for a 12V battery.......now that would be a

good

Quoted message said:

Quoted message said:

"dog stick".

A few months ago I was looking at the aluminium mouldings(?) (extrusions?) in the hardware store.
They have some fairly neat alu pipe that might be ideal for a pump-sized battery. Not sure how you
would seal the ends though.

I wouldn't mind a battery that would last the week with the 15 watter. It's not the charging
that's the problem, it's remembering to do it. Funny the way the power always drops out coming
down the hill just before the pot-holes...

The nice bit about the pump was that it had a nice mount to mount it to my bike. With a simple
aluminium tube, you'd have to engineer the lot. Perhaps a water bottle battery would make more sense
for you? You can stick ten 4.5Ah C cells in a water bottle. That would drive your 15W light for a
bit over 3.5 hours.

I only did the modified mini pump because I had one kicking around (complete with mounting hardware)
and it was _just_ the right size.

Regards,

Suzy

Oops.....Suzy is right.....I did use the 2700mAh batteries as per the link below.

My mate was keen for the 3000mAh ones (from a camera battery store I think), but they were $14 each
and so the cost - benefit ratio was too high in the end.

Gags

"Suzy Jackson" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

"Tim Jones" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Is this the battery? (May have to cut and paste URL...)

www1.jaycar.com.auproductView.aspOpen ↗

pageNumber=&priceMin=&priceMax=&SUBCATID=

Quoted message said:

Quoted message said:

Size 67 (L) x 17 (dia)mm

Nope. Five of these in a line would be 335mm long, a tad longer (and skinnier) than the
vistalight tube.

On the other hand, these ones:

www1.jaycar.com.auproductView.aspOpen ↗

r=&priceMin=&priceMax=&SUBCATID=583

Quoted message said:

Will do quite well. Sub C 2700mAh, 43mm long, 23mm round. $9 each.

FWIW, radio control toy cars use Sub-C batteries up to 3000mAh, such as:

www2.towerhobbies.comwti0001pOpen ↗

Though you pay a real premium for that extra few hundred mAh.

Quoted message said:

Are they 1.5V?

No, they're 1.2V.

Regards,

Suzy

"Glen F" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Quoted message said:

The chargers provided are "dumb" chargers in that they don't sense when a battery is fully
charged. I am currently working out a design for a smart charger that can basically charge a
NiMh battery pack of any voltage using an initial fast charge, that then switches to a trickle
charge once battery is fully charged. This will allow me to simply hook up my battery and leave
it connected until I am ready to use it next time.

A wide variety of fully automatic chargers of this sort are available from hobby stores for remote
controlled gadgets. You can pay anything from about $70 to over $300 for one that will handle Pb,
NiCad, NiMH and Lion/LiPoly. The one we have ($75) will charge any size packs of NiCad and NiMH
from 1 to 10 cells at a user-selectable rate from about 100mA to ~6A. Needs a (separate) 13.6v
supply...

You might find the design more challenging than you think. These things are usually microprocessor
controlled and use a variably pulsed charging strategy to detect the battery size, type, charging
response, and also monitor battery temperature...

Glen....I am actually an Electrical Engineer and so I have a pretty good idea of how I am going to
approach it. I am going to use a basic voltage regulator to get a constant current (probably at
least 1 to 1.5 Amps as most of the batteries that I want to charge are above 2700 mAh capacity). I
will then use a PIC with an in-built Analog to Digital convertor to periodically measure the voltage
accross the battery pack and compare it to the previous measurement. A switch will select between
NiCd and NiMh and then I will code the PIC with the appropriate algorithms for each type. Once the
change in voltage reduces to zero for NiMh or the voltage decreases for NiCd, the PIC will then
pulse the output down to an acceptable trickle current.

I reckon that the whole thing will cost me less than $50, and like I said.......where is the fun in
buying something off the shelf????

cheers,

Gags

Quoted message said:

I reckon that the whole thing will cost me less than $50, and like I said.......where is the fun
in buying something off the shelf????

Yeah, I know what you mean. I run a set of home made Fat Hippy lights with a home made auto charger
for the SLA. Just thought some here might be interested what's available in another market
- that they might not be aware of.