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I've ordered an O like 50mW green module. The dc voltage I will using is 4.5 volts. Is this to much and the laser will broke? Otherwise I'm planning to use a potmeter to drop de Voltage and measure it with a voltmeter . Someone an another idea for dropping the voltage and how low I need to go...

I've bougth here my 250mW module for DIY green Jayrob kit. You need too solder a spring for the battery and did some alu-folie for better fitting in the heat sink..... I like the beam , it's thick in de beginning and no much divergence at the end of the beam... It burns holes in black tape...

I've a jayrob 150mW kaleidoscopic Green laser. Now I want to build/buy a blue-ray(or other colour but not red) kaleidoscopic laser which has the beam visibility as my 150mW Jayrob. Is this possible?

I have a Ultrafire cr123a and the PCB (protection board) was broken so I disamble it..Now it's without protection board and working now It wil be still maximum 4.2 volts and if I not overcharge it it wil be safe battery?

Last week I was shining with a kaleidoscopic star Laserpointor over a Christmas tree.... It give a nice romantic Christmas effect like if you hanging a lot off liitle lights into the tree :P ...And only with a smal laserpointer with 2 small AAA battery's So if you can charge the battery at...

Hello! I bought some rcr123 batttery's from Deal-extreme who are 3.7 volts type. I have a Voltcraft CR-123 charger from Conrad electronics and I'm not sure its working with these battery's? Specs Reachargeable Lithium Ion battery's charger PRI: 12 V 500mA 6VA SEC: 2x4.3V 370mA 3.18 VA...

I've bought some rechargeable Lithium Lon battery's (Conrad , Voltcraft) They are sold like 3.7 volt battery but at the battery there is marked 3.0 volts? I want the strongest battery for my 150 mW O-like module and DIY Jayrob :) Is my rechargeable cr123 good and are there any differents into...

I have a 100mW O-like green module, can I do the pot mod with these? I've the Jayrob diy green, so there's good heatsinking,