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dev [2018/03/16 16:37]
jfduval
dev [2019/07/02 15:13] (current)
jfduval
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 //Note: to simplify the text we will use +VB to refer to batteries as well as power supplies.// //Note: to simplify the text we will use +VB to refer to batteries as well as power supplies.//
  
-USB can be used to stream data, and to power the logic portion of the circuits. If you aren't using +VB you may connect the circuit directly to your computer. Always keep in mind that this is experimental hardware and that it is often used without a protective casing; using a USB hub is a cheap insurance policy. A powered hub with a power switch is recommended. It will protect your computer, and it will supply enough current to power all the microcontrollers.+USB can be used to stream data, and to power the logic portion of the circuits. If you aren't using +VB you may connect the circuit directly to your computer. Always keep in mind that this is experimental hardware and that it is often used without a protective casing; using a USB hub is a cheap insurance policy. A powered hub with a power switch is recommended. It will protect your computer, and it will supply enough current to power all the microcontrollers. ​Internally we use [[https://​www.amazon.com/​gp/​product/​B00OTK16FK/​|TP-Link 7-Port USB 3.0 Ultra Slim Hub (UH700)]]
  
 Things start to be dangerous when you decide to connect +VB. What happens if your power ground connection opens (accidental disconnect, safety protection of your power supply, blown fuse, etc.)? It is likely that the only current path available is via USB. It is not designed to support the tens of amps that can be seen when using a motor, and it is likely to be damaged. Using a powered hub adds extra protection, but the degree of protection depends on the specific part number. To be safer, always use an isolated USB adapter (ex.: [[https://​www.amazon.com/​gp/​product/​B00XXPO4UG/​ref=oh_aui_search_detailpage?​ie=UTF8&​psc=1|SMAKN USB Isolator USB Digital Isolator Isolation USB to USB Industrial Isolator]]) Things start to be dangerous when you decide to connect +VB. What happens if your power ground connection opens (accidental disconnect, safety protection of your power supply, blown fuse, etc.)? It is likely that the only current path available is via USB. It is not designed to support the tens of amps that can be seen when using a motor, and it is likely to be damaged. Using a powered hub adds extra protection, but the degree of protection depends on the specific part number. To be safer, always use an isolated USB adapter (ex.: [[https://​www.amazon.com/​gp/​product/​B00XXPO4UG/​ref=oh_aui_search_detailpage?​ie=UTF8&​psc=1|SMAKN USB Isolator USB Digital Isolator Isolation USB to USB Industrial Isolator]])
dev.txt ยท Last modified: 2019/07/02 15:13 by jfduval