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| en:ztex_boards:ztex_fpga_boards:cluster_power_supplies [2012/02/09 17:33] – stefan | en:ztex_boards:ztex_fpga_boards:cluster_power_supplies [2023/10/30 16:20] (current) – removed stefan | ||
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| - | ====== Cluster Power Supplies ====== | ||
| - | Since ZTEX FPGA Board communicate via USB it is easily possible to build low cost FPGA clusters using USB hubs. For this purpose typically | ||
| - | [[http:// | ||
| - | |||
| - | This article presents some suggestions for the power supply of such FPGA Board Clusters. | ||
| - | |||
| - | ===== Small clusters ===== | ||
| - | |||
| - | For small clusters 60W PSUs and 5-waqy DC splitter cables from the online shop can be used | ||
| - | * [[http:// | ||
| - | * [[http:// | ||
| - | |||
| - | ===== Large clusters ===== | ||
| - | For larger FPGA clusters high efficient ATX PSU's with plugable cables are the best choice. The following guide explains how such a PSU can | ||
| - | be modified for an FPGA cluster. | ||
| - | |||
| - | Requirements: | ||
| - | * ATX PSU | ||
| - | * power cables with 2.1/5.5mm plug for the FPGA boards, e.g. from [[http:// | ||
| - | * bootlace ferrules and a crimp tool (e.g. from Ebay) | ||
| - | * luster terminal (e.g. from Ebay) | ||
| - | * heat shrink tubing (optional, e.g from Ebay) | ||
| - | |||
| - | Procedure: | ||
| - | - Connect FPGA board power cables (the ones with the 2.1/5.5mm plug) to the cables from PSU. GND wires from PSU (black) should not power more than 3 FPGA Boards and +12V wires (yellow) should not power more than 5 FPGA Boards. (GND wires are more critical in order to reduce current flows through USB cable) | ||
| - | - Cut off the HD connector / GPU connector / ATX12V connector (i.e. not the to-PSU plug) from the PSU cable and cut FPGA power cables to the desired length. | ||
| - | - Strip off the insulation of the wire ends:\\ {{: | ||
| - | - Crimp the bootlace ferrules to the wire ends. In the picture below wires from FPGA power cables are crimped together in groups of five (+12V) and 3 (GND).\\ {{: | ||
| - | - Not required but recommended: | ||
| - | - Connect the cable from PSU to FPGA power cable using the luster terminal. In the picture each GND wire from the PSU is connected to 3 GND wires to FPGA Board and each +12V wire is connected to 5 +12V wires to FPGA Board, i.e. all together 15 power cables to FPGA boards are connected to 3 +12V wires and 5 GND wires from PSU (was a GPU cable).\\ {{: | ||
| - | - Connect the "Power on" (green wire) signal to a GND wire (black), see http:// | ||
