The weirdest head torch yet.
Added 2020-01-30 04:34:07 +0000 UTCI'm not going to recommend this head torch. While it's commendable that it has a built in mains charger rated up to quarter of a thousand volts and a solar panel too, the device is rather bulky and heavy compared to many others.
If you don't mind having a big plastic brick on your forehead then it's certainly usable as a light. The COB provides a wide but dim wash of light and the beam is bright, but just a little too tight for close work. The LED options are just off and on. No dim mode for longer battery run time, other than the progressively dimmer operation as the battery discharges.
I'd guestimate the battery capacity at around 500mAh, but it's hard to say given the unusual choice of battery technology.
Comments
I still like SLA batteries. Lead-acid batteries are among the easiest to maintain as long as you know where they like to be kept happy.
Michael Thompson
2020-02-01 12:30:05 +0000 UTCI should watch the entire video before commenting ;)
Ryan Coleman
2020-01-31 20:19:06 +0000 UTCAs a regular user of SLA batteries... they have their uses. They're used in all sorts of slow-charge devices that have low-ish power output (Emergency lighting, for example). Also I am using them in a project in series. They're heavy, that's for sure, but they last a while and don't have the fire issue that LiPo does. They'll explode, but that's about it. This is why you don't see cars with LiPo vehicle batteries for starting and maintaining.
Ryan Coleman
2020-01-31 20:10:43 +0000 UTCIt does look like a camera. complete with flash.
Mike Hughes
2020-01-31 16:45:03 +0000 UTCPaint it silver. We need props for the next edition of "Johnny Spaceman"! Quickly there's no time!
Michael Thompson
2020-01-31 09:26:33 +0000 UTCIt's current limited so will be capped by the battery voltage.
Big Clive
2020-01-31 08:33:51 +0000 UTCIt does look a lot like a camera.
Big Clive
2020-01-31 08:33:12 +0000 UTCI'm trying not to step on electroboom's toes.
Big Clive
2020-01-31 08:32:40 +0000 UTCThe capacitive dropper acts like a current limiter. So the voltage will be affected by the load. The capacitor value is usually between 100nF and 1uF.
Big Clive
2020-01-31 08:31:46 +0000 UTCThat thing is U.G.L.Y. It ain't got no alibi...
Wim
2020-01-31 00:17:58 +0000 UTCBridge Rectifier not been said right. please take note..
2020-01-30 21:47:44 +0000 UTCYou didn't say
2020-01-30 21:47:05 +0000 UTCIt's almost like they had some cheap camera housing and thought "What terrible thing could we do with this?"
Chris Plater
2020-01-30 19:28:31 +0000 UTCThat was very interesting, however it raises a question for me- That had a 1uf capacitor that apparently gives 4 v after the FULL BRIDGE RECTIFIER (sorry - ElectroBoom will have to answer for that eventually! hahaha) How do you work out the voltage that you want , say to power x no of leds using a capacative dropper circuit? is there a formula or are you just going on experience when you design circuits requiring a cap dropper?
Mike Hughes
2020-01-30 16:58:19 +0000 UTCNot only Alarm systems. But very commonly in consumer UPS systems as well. These type of AGM (absorbed glass mat) Lead acid batteries only last 3 to 5 years and can go into thermal overrun.
Charles Bruckner
2020-01-30 11:56:43 +0000 UTCWould lead acid in cheap stuff be an attempt to side step shipping limitations on lithium cells?
2020-01-30 10:28:21 +0000 UTCIt looks like someone's high school design project
The Tinkering Shed
2020-01-30 07:50:44 +0000 UTCwhat drops the voltage coming out of the rectifier down to 4 volts?
Ruthsarian
2020-01-30 05:18:44 +0000 UTCIf you aren't going to eat the lead how are we ever going to know how it tastes?
Mark Trombley
2020-01-30 05:16:54 +0000 UTC
