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sambul83

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Last Activity: 07-31-2018, 08:32 AM

Joined: 03-19-2015

Location: London, ON

sambul83 replied to Converting Spotlight Power Supply

in Troubleshooting Power Supplies and Power Supply Design

07-30-2018, 08:58 AM
Re: Converting Spotlight Power Supply

Lets move the discussion about power grids in US and UK to a separate thread it deserves. Otherwise it creates chaos in this thread as obvious offtop making it hard to find useful info on topic for any reader. Asked the moderator to separate threads.

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sambul83 replied to Converting Spotlight Power Supply

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07-30-2018, 06:40 AM
Re: Converting Spotlight Power Supply

Power adapter I use now is 5V rated, but it actually heats up more when hooked to the Buffalo router compare to the lamp. Can someone link a cheap power supply in 2-5A range with manually adjustable voltage that can feed the lamp and other similar things in 5-12V range?

Also, can you guys link a very bright low cost compact flashlight as a replacement of this spotlight? I don't care about "tactical military" marketing crap, just [I]real[/I] high LM figure.Re: Converting Spotlight Power Supply
...

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sambul83 replied to Converting Spotlight Power Supply

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07-29-2018, 06:43 PM
Re: Converting Spotlight Power Supply

Since the thread is apparently still alive, let me interrupt your happy exchange with more relevant info. The modded spotlight draws 3A at 5.4V with both lamps lit, meaning at 6V it'll draw 2.7A. The adapter is slightly heatup now, I wonder if it limits the passing current as its a Buffalo Wireless router adapter, i.e. smarter than generic CN gear? The main lamp is likely a bit lower power rated than 25W figure I found on the web, unless the adapter limits power, possibly to prevent "router" damage? I'm hesitant to test...

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sambul83 replied to Converting Spotlight Power Supply

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07-27-2018, 07:12 PM
Re: Converting Spotlight Power Supply

I wonder if this [URL=https://www.aliexpress.com/store/product/LED-strip-5630-waterproof-IP65-12V-flexible-light-300led-60-leds-m-white-warm-white/1925593_32474298457.html]LED strip[/URL] will do the job? Steel wire or plastic tube may be used to push it along the tunnel, unless uneven non-smooth cement walls prevent movement. I wonder if brightness 20-30LM at power 20W at 5m length of cold white strip is bright enough to lit the tunnel sufficiently well for video recording by a small cam without night vision? This is a costlier [URL="https://www.lichtundwasserwelt.de/epages/64592233.sf/de_DE/?ObjectPath=/Shops/64592233/Products/90010-14/SubProducts/90013"]NeoFlex[/URL]...

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sambul83 replied to Converting Spotlight Power Supply

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07-27-2018, 04:14 PM
Re: Converting Spotlight Power Supply

While people are willing to contribute good ideas to the topic, there is no reason for the thread to be finalized, even if the topic seems exhausted. In fact, this is one of threads where OP direct questions were in fact directly answered and the solution found, which is not always the case. Meaning its more useful than average for future readers.

What would be a good Spotlight to evenly lite up from one end a 5-10m 1.5x1.5 ft narrow square tunnel or pipe to take periodic short videos? The spotlight must entirely fit...

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sambul83 replied to Converting Spotlight Power Supply

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07-26-2018, 08:37 PM
Re: Converting Spotlight Power Supply

It balances out your previous suggestion to buy a new lamp. ...

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sambul83 replied to Converting Spotlight Power Supply

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07-25-2018, 04:53 PM
Re: Converting Spotlight Power Supply

@ petehall347
Buying a "new nice modern lamp" would be too trivial thing to do, not exactly what this forum is about. The lamp is far not the only target in the budget hole .

@ Curious.George
With one project I need to evenly lit up a small tunnel compartment 1.5x1.5 ft about 5-10m (200-400 inches) through its length for 5min periodically. In another project, I need a small workspace 4x4m lit up at night for a few hours. One lamp may need to fit both tasks despite differences.

Can you post a...

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sambul83 replied to Converting Spotlight Power Supply

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07-25-2018, 11:58 AM
Re: Converting Spotlight Power Supply

I know its long obsolete tech with plenty of heat dissipated. Speaking about efficiencies, can you guys suggest a modern cree led 50W spotlight at low cost? I've small cree or similar flashlights brighter than this spotlight, but larger cree lamps seems to be on a costlier side.

@ stj

Thanks for pointing to this nice recovery charger.

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Last edited by sambul83; 07-25-2018, 12:00 PM.
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sambul83 replied to Converting Spotlight Power Supply

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07-25-2018, 07:16 AM
Re: Converting Spotlight Power Supply

Wouldn't adjusting the resistor value on that board, soldered in sequence now with the diode, and shorting the diode allow to use 12V power adapter instead of 6V? And what can possibly happen with the jack at 12V instead of 6V - melting is not likely I guess? Laptop 12V power adapters are seemingly all switching converters?

I can look at a 12V lamp, but current lamp seems soldered now to the wires in a way hard to get to. I couldn't shake it by hand in its sit after removing the holder, and using pliers on the lamp seems prohibitive....

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Last edited by sambul83; 07-25-2018, 08:02 AM.
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sambul83 replied to Converting Spotlight Power Supply

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07-24-2018, 06:06 PM
Re: Converting Spotlight Power Supply

Just confirmed using an old Buffalo router power adapter 5V 2.5A. Both lamps are lit now with diode-resistor combo short and also the 2 jack terminals short. It draws 3.5A current, but initial voltage 5.9V drops to 5V, so the lamp is not so bright. I guess I need to buy a 6V 4A adapter now. Is there a way to use a 12V adapter by modding the board, since I've a few with 2.5-3A rating, so they will heat up a bit at 3.5-4A but still working?

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Last edited by sambul83; 07-24-2018, 06:15 PM.
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sambul83 replied to Converting Spotlight Power Supply

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07-24-2018, 08:50 AM
Re: Converting Spotlight Power Supply

Yes, that's why the trick with shorting the resistor-diode combo didn't work by itself, so I [URL="https://www.badcaps.net/forum/showpost.php?p=840774&postcount=18"]short[/URL] 2 power jack mounts too, as it has 3. Will try with the right adapter now. If still not working, will draw the diagram. I don't remember, if the lamp was ever lit when the power adapter was hooked in and the battery charging.

@ Curious.George

Thanks for the explanation and suggested solution. I'm working on...

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Last edited by sambul83; 07-24-2018, 08:58 AM.
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sambul83 replied to Converting Spotlight Power Supply

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07-23-2018, 09:35 PM
Re: Converting Spotlight Power Supply

The rating 25W for for this spotlight lamp I found on the web. Its not seen anywhere on the lamp, so I don't know if its accurate. I'm a little confused, how this PCB normally works? Once connected to a power adapter (the bad one with small transformer ), it starts charging the battery. Once the battery charging current drops near 0, the charging circuit then drops slowly, while the battery (only?) supplies voltage to the lamps? So, if I short the diode and resistor combo, what should I do with black and red wires hooked to the (former) battery?...

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Last edited by sambul83; 07-23-2018, 10:28 PM.
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sambul83 replied to Converting Spotlight Power Supply

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07-23-2018, 06:52 AM
Re: Converting Spotlight Power Supply

@ kaboom

I have another 6V 2A adapter with the same plug size. I just need to rewire the board to hook it directly to the lamps through the existing jack without charging a battery. No such batteries on Aliexpress either, and they won't hold the charge for a long anyway, so the lamp was bright only for a short time on a battery, and then faded. An suggestions namely on rewire, since I don't won't to spend more on this old spotlight?

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Last edited by sambul83; 07-23-2018, 06:54 AM.
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sambul83 replied to Converting Spotlight Power Supply

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07-22-2018, 08:27 PM
Re: Converting Spotlight Power Supply

Is your above advice related to improving the charger? But I don't have a reasonably priced battery for it. Can you suggest, how to rewire the board to power the lamps straight from the power adapter?

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sambul83 replied to Converting Spotlight Power Supply

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07-22-2018, 07:30 PM
Re: Converting Spotlight Power Supply

The 6V 4Ah battery won't fit for sure, its longer and somewhat bigger. I'm looking for "no battery" solution now.

I wanted to reuse the existing jack that is firmly mounted in the plastic case and is preferred to a 2nd standalone jack wired to battery terminals. I just need to figure out how to disable the charging circuit without affecting other functionality like switching btw front and side lamps, red power led, and a lamp handle power switch. Its likely a very simple rewire, I'm just not good enough in PCB schematics...

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Last edited by sambul83; 07-22-2018, 07:52 PM.
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sambul83 posted a Visitor Message for budm

07-22-2018, 03:39 PM
Hi budm, pls suggest how to rewire the board to power the lamp directly from Power Adapter 6V 2A without using a battery? [url]https://www.badcaps.net/forum/showthread.php?p=840538[/url]https://Hi budm, pls suggest how to ...p=840538[/url]

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sambul83 replied to Converting Spotlight Power Supply

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07-22-2018, 03:09 PM
Re: Converting Spotlight Power Supply

Thanks for the battery hint, though its too costly in Canada for the task, like CAD45 shipped. And if I use 3W led module, I'd need to replace the internal battery charger with some different board? There might be a problem with holding the 3W module in place or cooling it well.

I prefer to power the front and side lamps directly from a 6V 2A power adapter I have, and don't use any battery. Would that be the right spec adapter, and how should I rewire the existing board? I can post more pics if the board layout is unclear.

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Last edited by sambul83; 07-22-2018, 03:35 PM.
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sambul83 started a topic Converting Spotlight Power Supply

in Troubleshooting Power Supplies and Power Supply Design

07-22-2018, 01:44 PM
Converting Spotlight Power Supply

I've an old Canadian Tire 37-9452 Halogen Spotlight, which seems to have 2mln candle H3 6v 25W halogen lamp, powered by lead battery SD620 6v 2Ah (cycle 7.25-7.45, standby 6.8-6.9 Yuyao SanDing Electric Ltd, size 3x1.85x1.5 inch), which is charged by the power adapter TL-9B 9V 300mA.

The battery is now dead, and I can't find replacement of the same size that would fit inside the Spotlight. Can you guys suggest & link a suitable battery model? May be using Li-Ion battery will be the best choice, but which one and how to charge it regularly without the Spotlight disassembly, as...

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Last edited by sambul83; 07-22-2018, 01:54 PM.
sambul83 replied to APC Back-UPS 1500 erratic behavior

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04-16-2018, 06:29 PM
Re: APC Back-UPS 1500 erratic behavior

Battery University would be incomplete without this [URL="http://jgdarden.com/batteryfaq/"]CAR AND DEEP CYCLE BATTERY FAQ 2018[/URL].

But sadly no cigar - meaning no Smart UPS for $5 deal. Re: APC Back-UPS 1500 erratic behavior

Battery University would be incomplete without this [URL="http://jgdarden.com/batteryfaq/"]CAR AND DEEP CYCLE BATTERY FAQ 2018[/URL].

But sadly no cigar - meaning no Smart UPS for $5 deal. Re: APC Back-UPS 1500 erratic behavior

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sambul83 replied to APC Back-UPS 1500 erratic behavior

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04-16-2018, 01:26 PM
Re: APC Back-UPS 1500 erratic behavior

Would measuring a battery [I]Cell internal resistance[/I] give a hint whether it has short internal cells? If yes, how to measure it in a meaningful way?Re: APC Back-UPS 1500 erratic behavior

Would measuring a battery [I]Cell internal resistance[/I] give a hint whether it has short internal cells? If yes, how to measure it in a meaningful way?Re: APC Back-UPS 1500 erratic behavior

Would measuring a battery [I]Cell internal resistance[/I] give a hint whether it has short internal cells? If yes,...

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Last edited by sambul83; 04-16-2018, 01:27 PM.
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