I am trying to use two output pins on a picaxe microcontroller to control two sets of high power LEDs. The LEDs are Luxeon Rebels 700mA and are driven by the buckpuck (http://www.luxdrive.com/content/3021-BuckPuck.pdf for the datasheet). I've got the 6-wire version of the driver which will control an LED bank, and using the circuits in figs 15, 16 in the datasheet can effectively get the strobe pattern I want (using PNP transistor so output high = ON). But I want two different flash patters on two LED banks.
The problem is that I can not yet use two ouputs, with different flash patterns: When I try (i.e. with the outputs controlling two separate buckpucks), both LED banks shine continuously. EVEN when I set up a second microchip for the second driver, sharing the 12v supply, when I connect both LED banks they both shine continuously. The only way round it I have found is to use completely separate power supplies (i.e. a second 9v battery for one of the driver-microprocessor-LED bank set).
The problem is that I can not yet use two ouputs, with different flash patterns: When I try (i.e. with the outputs controlling two separate buckpucks), both LED banks shine continuously. EVEN when I set up a second microchip for the second driver, sharing the 12v supply, when I connect both LED banks they both shine continuously. The only way round it I have found is to use completely separate power supplies (i.e. a second 9v battery for one of the driver-microprocessor-LED bank set).