Improving Phidgets Hardware Reliability - Revision history

Mparadis: /* Pulsed Power Consumption */

2019-10-18T17:00:54Z

Pulsed Power Consumption

← Older revision		Revision as of 17:00, 18 October 2019
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	You should only be concerned if the product documentation for your device mentions a high pulse load, and you are deploying multiple devices. Assurance that your devices are well above the reset voltages can be done in several ways:		You should only be concerned if the product documentation for your device mentions a high pulse load, and you are deploying multiple devices. Assurance that your devices are well above the reset voltages can be done in several ways:
	* Monitor USB voltage during operation with an oscilloscope. Make sure USB stays above 4.75 volts (if your USB device uses the Cypress Microcontroller, listed above)		* Monitor USB voltage during operation with an oscilloscope. Make sure USB stays above 4.75 volts (if your USB device uses the Cypress Microcontroller, listed above)
	* Change the USB cable to a longer cable, ~~run~~ the system for several hours, and ~~then~~ swap back to a shorter cable for deployment.		* Change the USB cable to a longer cable, test the system for several hours, and if there are no issues, swap back to a shorter cable for deployment.
	* Call application engineers at Phidgets Inc.		* Call application engineers at Phidgets Inc.

Mparadis: /* USB Supply Voltage */

2019-10-18T16:14:27Z

USB Supply Voltage

← Older revision		Revision as of 16:14, 18 October 2019
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	=== USB Supply Voltage ===		=== USB Supply Voltage ===

	Unpowered USB hubs can really reduce the USB supply voltage. The power to the hub is shared across multiple devices, and the hubs will often use inexpensive passive fuses that strongly reduce the voltage as current increases. Early versions of the Raspberry PI would typically provide such a low voltage that many USB Phidgets were prevented from working at all. If you suspect this is a problem in your system, try using an externally powered USB hub.		Unpowered USB hubs can really reduce the USB supply voltage. The power to the hub is shared across multiple devices, and the hubs will often use inexpensive passive fuses that strongly reduce the voltage as current increases. Early versions of the Raspberry Pi would typically provide such a low voltage that many USB Phidgets were prevented from working at all. If you suspect this is a problem in your system, try using an externally powered USB hub.

	=== Pulsed Power Consumption ===		=== Pulsed Power Consumption ===

Mparadis: /* USB Supply Voltage */

2019-10-18T16:13:55Z

USB Supply Voltage

← Older revision		Revision as of 16:13, 18 October 2019
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	=== USB Supply Voltage ===		=== USB Supply Voltage ===

	Unpowered USB hubs can really reduce the USB supply voltage. The power to the hub is shared across multiple devices, and the hubs will often use inexpensive passive fuses that strongly reduce the voltage as current increases. Early Raspberry ~~PIs~~ would typically provide such a low voltage that many USB Phidgets were prevented from working at all.		Unpowered USB hubs can really reduce the USB supply voltage. The power to the hub is shared across multiple devices, and the hubs will often use inexpensive passive fuses that strongly reduce the voltage as current increases. Early versions of the Raspberry PI would typically provide such a low voltage that many USB Phidgets were prevented from working at all. If you suspect this is a problem in your system, try using an externally powered USB hub.

	=== Pulsed Power Consumption ===		=== Pulsed Power Consumption ===

Mparadis: /* USB Cable */

2019-10-18T16:12:28Z

USB Cable

← Older revision		Revision as of 16:12, 18 October 2019
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	Some USB Cables have thin power conductors or a poorly bonded shield braid. This is unlikely to be an issue on a 30cm cable, but a longer USB cable needs to be properly built.		Some USB Cables have thin power conductors or a poorly bonded shield braid. This is unlikely to be an issue on a 30cm cable, but a longer USB cable needs to be properly built.

	The maximum length for a USB cable is 5 meters. We don’t recommend using USB extenders, repeaters, or USB over Ethernet products because they are often a source of instability. Implementing control of Phidgets over long distances or wireless is best done with the {{Prod\|HUB5000}} ~~- Wireless VINT Hub~~ if your system is exclusively [[What is VINT?\|VINT]], or the {{Prod\|SBC3003}} ~~- VINT SBC~~ if you also need to use some USB Phidgets.		The maximum length for a USB cable is 5 meters. We don’t recommend using USB extenders, repeaters, or USB over Ethernet products because they are often a source of instability. Implementing control of Phidgets over long distances or wireless is best done with the {{Prod\|HUB5000}} if your system is exclusively [[What is VINT?\|VINT]], or the {{Prod\|SBC3003}} if you also need to use some USB Phidgets.

	=== USB Supply Voltage ===		=== USB Supply Voltage ===

Mparadis: /* USB Cable */

2019-10-18T16:11:55Z

USB Cable

← Older revision		Revision as of 16:11, 18 October 2019
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	Some USB Cables have thin power conductors or a poorly bonded shield braid. This is unlikely to be an issue on a 30cm cable, but a longer USB cable needs to be properly built.		Some USB Cables have thin power conductors or a poorly bonded shield braid. This is unlikely to be an issue on a 30cm cable, but a longer USB cable needs to be properly built.

	The maximum length for a USB cable is 5 meters. We don’t recommend using USB extenders, repeaters, or USB over Ethernet products because they are often a source of instability. Implementing control of Phidgets over long distances or wireless is best done with the {{Prod\|~~SBC3003~~}} - VINT ~~SBC or (~~if your system is exclusively VINT~~) our~~ {{Prod\|~~HUB5000~~}} - ~~Wireless~~ VINT ~~Hub~~.		The maximum length for a USB cable is 5 meters. We don’t recommend using USB extenders, repeaters, or USB over Ethernet products because they are often a source of instability. Implementing control of Phidgets over long distances or wireless is best done with the {{Prod\|HUB5000}} - Wireless VINT Hub if your system is exclusively [[What is VINT?\|VINT]], or the {{Prod\|SBC3003}} - VINT SBC if you also need to use some USB Phidgets.

	=== USB Supply Voltage ===		=== USB Supply Voltage ===

Mparadis: /* USB Cable */

2019-10-18T16:10:14Z

USB Cable

← Older revision		Revision as of 16:10, 18 October 2019
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	=== USB Cable ===		=== USB Cable ===
	[[Image:USBconductors.jpg\|link=\|400px\|right]]		[[Image:USBconductors.jpg\|link=\|400px\|right]]
	Some USB Cables have thin power conductors ~~and/~~or a poorly bonded shield braid. This is unlikely to be an issue on a 30cm cable, but a longer USB cable needs to be properly built.		Some USB Cables have thin power conductors or a poorly bonded shield braid. This is unlikely to be an issue on a 30cm cable, but a longer USB cable needs to be properly built.

	The maximum length for a USB cable is 5 meters. We don’t recommend using USB extenders, repeaters, or USB over Ethernet products because they are often a source of instability. Implementing control of Phidgets over long distances or wireless is best done with the {{Prod\|SBC3003}} - VINT SBC or (if your system is exclusively VINT) our {{Prod\|HUB5000}} - Wireless VINT Hub.		The maximum length for a USB cable is 5 meters. We don’t recommend using USB extenders, repeaters, or USB over Ethernet products because they are often a source of instability. Implementing control of Phidgets over long distances or wireless is best done with the {{Prod\|SBC3003}} - VINT SBC or (if your system is exclusively VINT) our {{Prod\|HUB5000}} - Wireless VINT Hub.

Mparadis: /* Specific USB Phidget */

2019-10-18T16:09:49Z

Specific USB Phidget

← Older revision		Revision as of 16:09, 18 October 2019
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	----		----

	~~Other~~ USB Phidgets have a much lower reset threshold, and would require a very unlikely scenario to produce a low voltage reset.		USB Phidgets other than those listed here have a much lower reset threshold, and would require a very unlikely scenario to produce a low voltage reset.

	=== USB Cable ===		=== USB Cable ===

Mparadis: /* Specific USB Phidget */

2019-10-18T16:06:54Z

Specific USB Phidget

← Older revision		Revision as of 16:06, 18 October 2019
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	=== Specific USB Phidget ===		=== Specific USB Phidget ===

	Older designs of Phidgets that use Cypress microcontrollers need to set a very high reset threshold to guard against erratic behaviour; the device will reset (detach) if USB power drops below 4.55 volts. A complete list of Phidgets with Cypress microcontrollers follows (omitting the revision number, this applies to all devices with the base part number). Click on the "~~expand~~" next to your Phidget listed here to see where to measure with a multimeter if you suspect an issue.		Older designs of Phidgets that use Cypress microcontrollers need to set a very high reset threshold to guard against erratic behaviour; the device will reset (detach) if USB power drops below 4.55 volts. A complete list of Phidgets with Cypress microcontrollers follows (omitting the revision number, this applies to all devices with the base part number). Click on the [<font color="#269964">'''Expand'''</font>] next to your Phidget listed here to see where to measure with a multimeter if you suspect an issue.

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Mparadis: /* Specific USB Phidget */

2019-10-18T15:42:48Z

Specific USB Phidget

← Older revision		Revision as of 15:42, 18 October 2019
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	=== Specific USB Phidget ===		=== Specific USB Phidget ===

	Older designs of Phidgets that use Cypress microcontrollers ~~have~~ to set a very high reset threshold to guard against erratic behaviour; the device will reset (detach) if USB power drops below 4.55 volts. A complete list of Phidgets with Cypress microcontrollers follows (omitting the revision number, this applies to all devices with the base part number). ~~For each~~ Phidget~~, we show a recommended place~~ to measure ~~USB voltage~~ with a multimeter, if you suspect an issue.		Older designs of Phidgets that use Cypress microcontrollers need to set a very high reset threshold to guard against erratic behaviour; the device will reset (detach) if USB power drops below 4.55 volts. A complete list of Phidgets with Cypress microcontrollers follows (omitting the revision number, this applies to all devices with the base part number). Click on the "expand" next to your Phidget listed here to see where to measure with a multimeter if you suspect an issue.

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Mparadis: /* Specific USB Phidget */

2019-10-18T15:41:04Z

Specific USB Phidget

← Older revision		Revision as of 15:41, 18 October 2019
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	----		----

	{{TestPoints\|1002 - PhidgetAnalog 4-Output\|1002_TestPoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints\|1002 - PhidgetAnalog 4-Output\|1002_TestPoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

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	{{TestPoints\|1010 - PhidgetInterfaceKit 8/8/8 Mini-Format\|1010_TestPoints\|Test any 'G' pin and any '5V' pin.}}		{{TestPoints\|1010 - PhidgetInterfaceKit 8/8/8 Mini-Format\|1010_TestPoints\|Test any 'G' pin and any '5V' pin.}}

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	{{TestPoints\|1011 - PhidgetInterfaceKit 2/2/2\|1011_Testpoints\|Connect the cable to the 1011 and measure between any red wire and any black wire.}}		{{TestPoints\|1011 - PhidgetInterfaceKit 2/2/2\|1011_Testpoints\|Connect the cable to the 1011 and measure between any red wire and any black wire.}}

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	{{TestPoints\|1012 - Phidget InterfaceKit 0/16/16\|1012_Testpoints\|Test any '5V' and any 'G' pin.}}		{{TestPoints\|1012 - Phidget InterfaceKit 0/16/16\|1012_Testpoints\|Test any '5V' and any 'G' pin.}}

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	{{TestPoints3\|1014 - PhidgetInterfaceKit 0/0/4\|1014_2 (hardware rev. a,b or c)\|1014_2abc_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1014_2\|1014_2_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1014_1 or 1014_0\|1014_01_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints3\|1014 - PhidgetInterfaceKit 0/0/4\|1014_2 (hardware rev. a,b or c)\|1014_2abc_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1014_2\|1014_2_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1014_1 or 1014_0\|1014_01_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

	----		----

	{{TestPoints2\|1017 - PhidgetInterfaceKit 0/0/8\|1017_1\|1017_1_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1017_0\|1017_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints2\|1017 - PhidgetInterfaceKit 0/0/8\|1017_1\|1017_1_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1017_0\|1017_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

	----		----

	{{TestPoints\|1018 - Phidget InterfaceKit 8/8/8\|1018_Testpoints\|Test any '5V' and any 'G' pin.}}		{{TestPoints\|1018 - Phidget InterfaceKit 8/8/8\|1018_Testpoints\|Test any '5V' and any 'G' pin.}}

	----		----

	{{TestPoints\|1040 - PhidgetGPS\|1040_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints\|1040 - PhidgetGPS\|1040_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

	----		----

	{{TestPoints2\|1045 - PhidgetTemperatureSensor IR\|1045_1\|1045_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1045_0\|1045_0_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints2\|1045 - PhidgetTemperatureSensor IR\|1045_1\|1045_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1045_0\|1045_0_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.}}

	----		----

	{{TestPoints3\|1046 - PhidgetBridge 4-Input\|1046_0 (hardware rev. d)\|1046_2d_Testpoints\|On the top of the board, use the test points as pictured.\|1046_0 (hardware rev. a, b, or c)\|1046_0abc_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1046_0\|1046_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints3\|1046 - PhidgetBridge 4-Input\|1046_0 (hardware rev. d)\|1046_2d_Testpoints\|On the top of the board, use the test points as pictured.\|1046_0 (hardware rev. a, b, or c)\|1046_0abc_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1046_0\|1046_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

	----		----

	{{TestPoints\|1047 - PhidgetEncoder HighSpeed 4-Input\|1047_Testpoints\|Test the '5V' and 'G' pin.}}		{{TestPoints\|1047 - PhidgetEncoder HighSpeed 4-Input\|1047_Testpoints\|Test the '5V' and 'G' pin.}}

	----		----

	{{TestPoints\|1048 - PhidgetTemperatureSensor 4-Input\|1048_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints\|1048 - PhidgetTemperatureSensor 4-Input\|1048_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

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	{{TestPoints3\|1051 - PhidgetTemperatureSensor 1-Input\|1051_2 (hardware rev. a)\|1051_2a_Testpoints\|On the top of the board, use the test points as pictured.\|1051_2\|1051_2_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1051_1 or 1051_0\|1051_01_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints3\|1051 - PhidgetTemperatureSensor 1-Input\|1051_2 (hardware rev. a)\|1051_2a_Testpoints\|On the top of the board, use the test points as pictured.\|1051_2\|1051_2_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1051_1 or 1051_0\|1051_01_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

	----		----

	{{TestPoints\|1054 - Phidget FrequencyCounter\|1054_Testpoints\|Test any '5V' and any 'G' pin.}}		{{TestPoints\|1054 - Phidget FrequencyCounter\|1054_Testpoints\|Test any '5V' and any 'G' pin.}}

	----		----

	{{TestPoints\|1055 - PhidgetIR\|1055_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints\|1055 - PhidgetIR\|1055_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

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	{{TestPoints\|1057 - PhidgetEncoder HighSpeed\|1057_Testpoints\|Test the second and fifth pins on the encoder connector, either where the bent pin enters the plastic housing on top, or where the pins are soldered on the underside.}}		{{TestPoints\|1057 - PhidgetEncoder HighSpeed\|1057_Testpoints\|Test the second and fifth pins on the encoder connector, either where the bent pin enters the plastic housing on top, or where the pins are soldered on the underside.}}

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	{{TestPoints2\|1061 - PhidgetAdvancedServo 8-Motor\|1061_1\|1061_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1061_0\|1061_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints2\|1061 - PhidgetAdvancedServo 8-Motor\|1061_1\|1061_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1061_0\|1061_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

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	{{TestPoints2\|1062 - PhidgetStepper Unipolar 4-Motor\|1062_1\|1062_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1062_0\|1062_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints2\|1062 - PhidgetStepper Unipolar 4-Motor\|1062_1\|1062_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1062_0\|1062_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

	----		----

	{{TestPoints2\|1064 - PhidgetMotorControl HC\|1064_1\|1064_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1064_0\|1064_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints2\|1064 - PhidgetMotorControl HC\|1064_1\|1064_1_Testpoints\|On the top of the board, test the USB connector's power and ground pins as pictured.\|1064_0\|1064_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}

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	{{TestPoints\|1065 - PhidgetMotorControl 1-Motor\|1065_TestPoints\|Test the 'G' pin and '5V' pin.}}		{{TestPoints\|1065 - PhidgetMotorControl 1-Motor\|1065_TestPoints\|Test the 'G' pin and '5V' pin.}}

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	{{TestPoints2\|1066 - PhidgetAdvancedServo 1-Motor\|1066_1\|1066_1_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1066_0\|1066_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}		{{TestPoints2\|1066 - PhidgetAdvancedServo 1-Motor\|1066_1\|1066_1_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.\|1066_0\|1066_0_Testpoints\|On the underside of the board, test the USB connector's power and ground pins as pictured.}}
			----

	Other USB Phidgets have a much lower reset threshold, and would require a very unlikely scenario to produce a low voltage reset.		Other USB Phidgets have a much lower reset threshold, and would require a very unlikely scenario to produce a low voltage reset.