This item came up in a search on ebay for LIR2032 which is a rechargeable lithium cell. I bought it to take a look inside to see what sort of charging circuitry is used for the cell.
I'm afraid it's not very exciting. At first glance it appears that the control of the LEDs and the cell voltage management is all integrated onto a single chip that is a resin blob COB (Chip On Board). The light is clearly not waterproof and is unlikely to handle adverse weather with dignity. the charging port is a common small power-jack connector which was a bit dodgy and is likely to inject any trapped rainwater directly into the case when used.
But hey. It's cheap and kinda works, so if you're prone to losing your bicycle lights then this might be a viable option. It also contains a removable LIR2032 cell which is handy.
I'm afraid it's not very exciting. At first glance it appears that the control of the LEDs and the cell voltage management is all integrated onto a single chip that is a resin blob COB (Chip On Board). The light is clearly not waterproof and is unlikely to handle adverse weather with dignity. the charging port is a common small power-jack connector which was a bit dodgy and is likely to inject any trapped rainwater directly into the case when used.
But hey. It's cheap and kinda works, so if you're prone to losing your bicycle lights then this might be a viable option. It also contains a removable LIR2032 cell which is handy.
I just made cheap front lamp with li-ion charger module[2cmx2cm/1A-TP4056],old 3.7V/1200mAh battery from phone and 3W/350mA cree LED[driver in PCB].Works bright [200lm] and fine,cost about 3$. ;D
can you teardown/review a USB electronic lighter? they can be bought from ebay about 1.50ish, there are only scant reviews and no teardowns of one on youtube
what leds did you order god that will last you along time
I was guessing the charge circuit is the red led in series with the 5V supply, with the 1V5 drop of the LED and some resistance doing the charge current voltage and current limiting. Will charge the cell to "around" the right voltage.
Nearly didn't see some guy on a bike the other day. He had a really dim poundland rear light and nothing on the front. I saw what sort of lighting he had, when I watched him lock up at the supermarket. He spent more on the lock than the light. I would have spent more on the lighting, but I'm fairly lax about bike security.
I can just imagine someone trying to load this in their Blu-ray player to try out the "Smart blu-ray charging" feature… =)
Who's your LED supplier?
Seven thousand LED's? New project you're working on?
im rather hoping to see a 7k led bike light.