Model #2009-H powers a 1 watt LED at 350ma/2.5v with two rechargeable batteries. Model #2009A is the standard single 1 watt driver at 350mA and will drive a 1 watt LED or strings of 5mm LEDs from 2 alkaline cells or another 3v power source.
All 350mA models have been designed to power one or two 1 Watt LEDs or strings of 5mm LEDs. All 700mA models will handle (1) 5 Watt LED, (4) 1 Watt LEDs, or strings of 5mm LEDs.
Unlike standard power supplies, which deliver a fixed voltage to the output, the 3021 is designed to vary the output voltage as required to deliver a constant current to the LED(s) reliably and with stability. See data sheets below.
A fast response current sensing circuit makes the 4015 BoostPuck ideal for applications where flashing or strobe operations of the LED is desired
Good for small confined space applications since it can be easily incorporated into the housing assembly. See how the BuckToot is connected to the amber array image.