This is an LED driver which is designed to provide a fast current pulse, adjustable from about 0-70mA and 0-50ns with fast (sub-ns) risetime to drive an LED. The pulser is composed of two separate units. A control box mounted in an aluminum enclosure accepts an input trigger pulse, and provides adjustments for output current and pulse width. A small driver board which drives the LED is connected by two cables (one BNC and one RJ-45 network-type cable) to the control unit. The driver PCB would typically be mounted inside a dark box with a photo-detector. = Updated Documentation Feb 2013 = * [http://ohm.bu.edu/~hazen/LED_Pulser/LEDPulserUserManual.pdf User Manual] * Control Box * Schematic: [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Control_Box.sch SCH] • [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Control_Box_sch.pdf PDF] * PCB layout: [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Control_Box.pcb PCB] • [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Control_Box_pcb.pdf PDF] * Bill of Materials: [http://ohm.bu.edu/~hazen/LED_Pulser/2013/Control_Box_BOM.xls XLS] * Box Design: [http://ohm.bu.edu/~hazen/LED_Pulser/2013/Final%20Front%20Panel%20Designs/ Final Front Panel Designs] * Driver Board * Schematic: [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Driver.sch SCH] • [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Driver_sch.pdf PDF] * PCB layout: [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Driver_Panelized.pcb PCB] – [http://ohm.bu.edu/~hazen/LED_Pulser/2013/LED_Driver_Panelized_pcb.pdf PDF] * Bill of Materials: [http://ohm.bu.edu/~hazen/LED_Pulser/2013/Driver_Board_BOM.xls XLS] = Current inventory = Link to google spreadsheet of current inventory [https://docs.google.com/spreadsheet/ccc?key=0Avc95PUpsvSidDZEQXVlNlZ4bTlnYUNsV2NQSXhCS3c&hl=en_US#gid=0 GoogleDoc] = Sets Shipped = The following complete sets were shipped on 10/5/2011: * Set1: LED Pulser #4; LED Pulse Generator #4; Box #4; Power Supply; RJ45 Cable; BNC Cable * Set2: LED Pulser #2; LED Pulse Generator #3; Box #3; Power Supply, RJ45 Cable; BNC Cable = Version 2.1 = Design slightly revised; juxtapose R8 and R9 on the LED Driver Board and replace R13 with 820 ohm in parallel with 10k ohm – [http://ohm.bu.edu/~genews/led_pulser/LED_PulserDriver_10.21.11.sch ExpressPCB] Design revised; removed R14 – [http://ohm.bu.edu/~genews/led_pulser/LED.Pulser.10.21.11.sch ExpressPCB] = Version 2 = Design revised in April 2011. This version is essentially the same as Version 1 but with ECOs taken care of. === LED Driver Board == * Bill of Materials – [https://spreadsheets.google.com/ccc?key=0AsqOrxRlvdC9dHkwVmlFTHpBbXh2QzFXUjZPVmcxUFE&hl=en&authkey=CMjB32E Google Doc] [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED_Pulser_Driver_BOM.xls XLS backup] • [http://ohm.bu.edu/~cjlawlor/LED_PulserMark2/LED_Pulser_Driver_BOM_Assembly_ProForma.xls Assembly Pro Forma] * Schematic – [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED_PulserDriver_4.15.11.sch ExpressPCB] [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED_Pulser_Driver_RevB_sch.pdf PDF] * PCB Layout – [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED_PulserDriver_4.15.11.pcb ExpressPCB] [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED_Pulser_Driver_RevB_layout.pdf PDF] === Pulse Generator Board == * Bill of Materials – [https://spreadsheets.google.com/ccc?key=0AsqOrxRlvdC9dFRxcU80WklrM2VoTXVtNXh4ZFY3RWc&hl=en&authkey=CP_ypuEM Google Doc] [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/Driver_BOM.xls XLS backup] (this file is named wrong!) • [http://ohm.bu.edu/~cjlawlor/LED_PulserMark2/PULSer_BOM_Assembly_ProForma.xlsx Assembly Pro Forma] * Schematic – [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED.Pulser.4.13.11sch.sch ExpressPCB] [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED_Pulser_RevF_sch.pdf PDF] * PCB Layout – [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED.Pulser.4.13.11_Edit.pcb ExpressPCB] [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/LED_pulser_RevF_layout.pdf PDF] Or see the [http://ohm.bu.edu/~hazen/LED_Pulser/Mark2/ Design Files] = LEDs = The following P/N high-brightness blue LEDs have been suggested: L53NBC, L7113NBC, NSPB500S, NSPB300S. (We have not yet tested any of these). = Version 1 = See some [http://ohm.bu.edu/~hazen/LED_Pulser/photos/ photos] == Pulse Generator Board == * ExpressPCB design files – [http://ohm.bu.edu/~hazen/LED_Pulser/LED_Pulser.sch Schematic] • [http://ohm.bu.edu/~hazen/LED_Pulser/LED_Pulser.pcb PCB Layout] * Documentation files – [http://ohm.bu.edu/~hazen/LED_Pulser/LED_Pulser_sch.pdf Schematic (pdf)] • [http://ohm.bu.edu/~hazen/LED_Pulser/LED_Pulser_BOM.csv BOM (csv)] • [http://ohm.bu.edu/~hazen/LED_Pulser/LED_Pulser_BOM.ods BOM (ods)] * An ECO needs to be created for this board (11-12-09) == LED Driver Board == * ExpressPCB LED Driver Board – [http://ohm.bu.edu/~pbohn/LED-PULSER/Design_Files/LED.Pulser.sch Schematic] • [http://ohm.bu.edu/~pbohn/LED-PULSER/Design_Files/LED.Pulser.pcb PCB Layout] • [http://ohm.bu.edu/~hazen/LED_Pulser/Driver_BOM.ods BOM (ods)] * Documentation files – [http://ohm.bu.edu/~hazen/LED_Pulser/LED_Driver_RevE.pdf Schematic (pdf)] == Enclosure == The LED Pulser Driver PCB will be housed in a Front Panel Express Enclosure. [http://www.frontpanelexpress.com/en/enclosures/side-profiles.html See: side profile 2] * [http://ohm.bu.edu/~pbohn/LED-PULSER/Drawings/led_pulser_enclosure.dwg Enclosure Drawing] * [http://ohm.bu.edu/~eob/LED_Pulser Front Panel Express Enclosure Design Files] * [http://ohm.bu.edu/~pbohn/LED-PULSER/Drawings/pulser_sidepanel.zip Updated Enclosure Side Panel] * [http://ohm.bu.edu/~pbohn/LED-PULSER/Data_Sheets/Enclosure-Manual-2008.pdf Front Panel Express Enclosure Manual]