Thin wall to block LED light from hitting photodiode?IR Thermometer DesignMinimizing PCB size of a 192 RGB LED arrayAlternatives to Arduino for controlling LED's and Audio files?photodiode, ldr and light sourceHelp me Help Students! (Solar Powered, Switched, Red and Green Light Device)Human perceived (relative) brightness of indicator LEDsopt 101P photodiode for light communicationLow-cost way of shining a wide line of light, kind of like some bar code scanners doWhat lens/reflector when bouncing off ceilingPhotodiode to detect light
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Thin wall to block LED light from hitting photodiode?
IR Thermometer DesignMinimizing PCB size of a 192 RGB LED arrayAlternatives to Arduino for controlling LED's and Audio files?photodiode, ldr and light sourceHelp me Help Students! (Solar Powered, Switched, Red and Green Light Device)Human perceived (relative) brightness of indicator LEDsopt 101P photodiode for light communicationLow-cost way of shining a wide line of light, kind of like some bar code scanners doWhat lens/reflector when bouncing off ceilingPhotodiode to detect light
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I'm designing a small heart rate sensor using green smd LEDs and a photodiode. The photodiode needs to measure the reflected light, and not direct light from the LEDs. The LEDs are near the perimeter of the photodiode, so I'm trying to figure out some sort of thin wall to block their light from hitting the photodiode. The LEDs have a relatively wide viewing angle (110˚) and are ~1mm tall, so ideally something that is about 2mm tall.
I'm wondering if anyone has suggestions for some type of wall or component I could place between each LED and photodiode to block light?
led sensor surface-mount photodiode light-sensor
asked 8 hours ago
Joey CostelloJoey Costello
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Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |
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I'm designing a small heart rate sensor using green smd LEDs and a photodiode. The photodiode needs to measure the reflected light, and not direct light from the LEDs. The LEDs are near the perimeter of the photodiode, so I'm trying to figure out some sort of thin wall to block their light from hitting the photodiode. The LEDs have a relatively wide viewing angle (110˚) and are ~1mm tall, so ideally something that is about 2mm tall.
I'm wondering if anyone has suggestions for some type of wall or component I could place between each LED and photodiode to block light?
led sensor surface-mount photodiode light-sensor
asked 8 hours ago
Joey CostelloJoey Costello
111 bronze badge
New contributor
Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
$begingroup$
Get some thin brass shim stock. Cut into strips and wrap around the diode. A drop of 5-minute epoxy will hold it in place. If the brass doesn't appeal, get some heavyweight paper and use that. 20 pound bond should do pretty well, and if you need more absorption, wind a couple of layers. I expect handling these small pieces will try your patience. Or get some thin-wall tubing of the correct size, cut off a small length and slip over the diode. Again, you won't have fun will the small sizes, so you'll have to be patient.
$endgroup$
– WhatRoughBeast
8 hours ago
add a comment |
$begingroup$
I'm designing a small heart rate sensor using green smd LEDs and a photodiode. The photodiode needs to measure the reflected light, and not direct light from the LEDs. The LEDs are near the perimeter of the photodiode, so I'm trying to figure out some sort of thin wall to block their light from hitting the photodiode. The LEDs have a relatively wide viewing angle (110˚) and are ~1mm tall, so ideally something that is about 2mm tall.
I'm wondering if anyone has suggestions for some type of wall or component I could place between each LED and photodiode to block light?
led sensor surface-mount photodiode light-sensor
asked 8 hours ago
Joey CostelloJoey Costello
111 bronze badge
New contributor
Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I'm designing a small heart rate sensor using green smd LEDs and a photodiode. The photodiode needs to measure the reflected light, and not direct light from the LEDs. The LEDs are near the perimeter of the photodiode, so I'm trying to figure out some sort of thin wall to block their light from hitting the photodiode. The LEDs have a relatively wide viewing angle (110˚) and are ~1mm tall, so ideally something that is about 2mm tall.
I'm wondering if anyone has suggestions for some type of wall or component I could place between each LED and photodiode to block light?
led sensor surface-mount photodiode light-sensor
led sensor surface-mount photodiode light-sensor
asked 8 hours ago
Joey CostelloJoey Costello
111 bronze badge
New contributor
Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 hours ago
Joey CostelloJoey Costello
111 bronze badge
New contributor
Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 hours ago
Joey CostelloJoey Costello
111 bronze badge
New contributor
Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 hours ago
Joey CostelloJoey Costello
111 bronze badge
asked 8 hours ago
Joey CostelloJoey Costello
111 bronze badge
111 bronze badge
New contributor
Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Joey Costello is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$begingroup$
Get some thin brass shim stock. Cut into strips and wrap around the diode. A drop of 5-minute epoxy will hold it in place. If the brass doesn't appeal, get some heavyweight paper and use that. 20 pound bond should do pretty well, and if you need more absorption, wind a couple of layers. I expect handling these small pieces will try your patience. Or get some thin-wall tubing of the correct size, cut off a small length and slip over the diode. Again, you won't have fun will the small sizes, so you'll have to be patient.
$endgroup$
– WhatRoughBeast
8 hours ago
add a comment |
$begingroup$
Get some thin brass shim stock. Cut into strips and wrap around the diode. A drop of 5-minute epoxy will hold it in place. If the brass doesn't appeal, get some heavyweight paper and use that. 20 pound bond should do pretty well, and if you need more absorption, wind a couple of layers. I expect handling these small pieces will try your patience. Or get some thin-wall tubing of the correct size, cut off a small length and slip over the diode. Again, you won't have fun will the small sizes, so you'll have to be patient.
$endgroup$
– WhatRoughBeast
8 hours ago
$begingroup$
Get some thin brass shim stock. Cut into strips and wrap around the diode. A drop of 5-minute epoxy will hold it in place. If the brass doesn't appeal, get some heavyweight paper and use that. 20 pound bond should do pretty well, and if you need more absorption, wind a couple of layers. I expect handling these small pieces will try your patience. Or get some thin-wall tubing of the correct size, cut off a small length and slip over the diode. Again, you won't have fun will the small sizes, so you'll have to be patient.
$endgroup$
– WhatRoughBeast
8 hours ago
$begingroup$
Get some thin brass shim stock. Cut into strips and wrap around the diode. A drop of 5-minute epoxy will hold it in place. If the brass doesn't appeal, get some heavyweight paper and use that. 20 pound bond should do pretty well, and if you need more absorption, wind a couple of layers. I expect handling these small pieces will try your patience. Or get some thin-wall tubing of the correct size, cut off a small length and slip over the diode. Again, you won't have fun will the small sizes, so you'll have to be patient.
$endgroup$
– WhatRoughBeast
8 hours ago
add a comment |
3 Answers
3
active
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$begingroup$
My advice is to not bother doing what you're doing, and spend the $3.50US to get the part designed for the task, like https://www.digikey.com/product-detail/en/osram-opto-semiconductors-inc/SFH-7060/475-3174-2-ND/6137022
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
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add a comment |
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I've had luck with drilling holes in lids to microcentrifuge tubes (or other small bottles), cut pieces of copper tubing from the hardware store, or even a piece of black electrical tape in a pinch (my least favorite option). I have also made little barriers out of thin cardboard stock cut from packaging...easy to cut and form...that worked well.
Hotglue, epoxy, and silicone all make decent adhesives. Be careful with silicone, as the RTV stuff can sometimes corrode electronics.
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
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add a comment |
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Make some slots in the PCB and solder a small piece of metal there. I've seen it work remarkably well in real-life applications.
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
$endgroup$
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
My advice is to not bother doing what you're doing, and spend the $3.50US to get the part designed for the task, like https://www.digikey.com/product-detail/en/osram-opto-semiconductors-inc/SFH-7060/475-3174-2-ND/6137022
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
$endgroup$
add a comment |
$begingroup$
My advice is to not bother doing what you're doing, and spend the $3.50US to get the part designed for the task, like https://www.digikey.com/product-detail/en/osram-opto-semiconductors-inc/SFH-7060/475-3174-2-ND/6137022
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
$endgroup$
add a comment |
$begingroup$
My advice is to not bother doing what you're doing, and spend the $3.50US to get the part designed for the task, like https://www.digikey.com/product-detail/en/osram-opto-semiconductors-inc/SFH-7060/475-3174-2-ND/6137022
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
$endgroup$
My advice is to not bother doing what you're doing, and spend the $3.50US to get the part designed for the task, like https://www.digikey.com/product-detail/en/osram-opto-semiconductors-inc/SFH-7060/475-3174-2-ND/6137022
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
edited 6 hours ago
JYelton
16.6k28 gold badges94 silver badges195 bronze badges
16.6k28 gold badges94 silver badges195 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
answered 8 hours ago
Scott SeidmanScott Seidman
23.2k4 gold badges32 silver badges89 bronze badges
23.2k4 gold badges32 silver badges89 bronze badges
add a comment |
add a comment |
$begingroup$
I've had luck with drilling holes in lids to microcentrifuge tubes (or other small bottles), cut pieces of copper tubing from the hardware store, or even a piece of black electrical tape in a pinch (my least favorite option). I have also made little barriers out of thin cardboard stock cut from packaging...easy to cut and form...that worked well.
Hotglue, epoxy, and silicone all make decent adhesives. Be careful with silicone, as the RTV stuff can sometimes corrode electronics.
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
$endgroup$
add a comment |
$begingroup$
I've had luck with drilling holes in lids to microcentrifuge tubes (or other small bottles), cut pieces of copper tubing from the hardware store, or even a piece of black electrical tape in a pinch (my least favorite option). I have also made little barriers out of thin cardboard stock cut from packaging...easy to cut and form...that worked well.
Hotglue, epoxy, and silicone all make decent adhesives. Be careful with silicone, as the RTV stuff can sometimes corrode electronics.
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
$endgroup$
add a comment |
$begingroup$
I've had luck with drilling holes in lids to microcentrifuge tubes (or other small bottles), cut pieces of copper tubing from the hardware store, or even a piece of black electrical tape in a pinch (my least favorite option). I have also made little barriers out of thin cardboard stock cut from packaging...easy to cut and form...that worked well.
Hotglue, epoxy, and silicone all make decent adhesives. Be careful with silicone, as the RTV stuff can sometimes corrode electronics.
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
$endgroup$
I've had luck with drilling holes in lids to microcentrifuge tubes (or other small bottles), cut pieces of copper tubing from the hardware store, or even a piece of black electrical tape in a pinch (my least favorite option). I have also made little barriers out of thin cardboard stock cut from packaging...easy to cut and form...that worked well.
Hotglue, epoxy, and silicone all make decent adhesives. Be careful with silicone, as the RTV stuff can sometimes corrode electronics.
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
answered 8 hours ago
evildemonicevildemonic
3,4671 gold badge11 silver badges29 bronze badges
3,4671 gold badge11 silver badges29 bronze badges
add a comment |
add a comment |
$begingroup$
Make some slots in the PCB and solder a small piece of metal there. I've seen it work remarkably well in real-life applications.
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
$endgroup$
add a comment |
$begingroup$
Make some slots in the PCB and solder a small piece of metal there. I've seen it work remarkably well in real-life applications.
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
$endgroup$
add a comment |
$begingroup$
Make some slots in the PCB and solder a small piece of metal there. I've seen it work remarkably well in real-life applications.
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
$endgroup$
Make some slots in the PCB and solder a small piece of metal there. I've seen it work remarkably well in real-life applications.
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
answered 5 hours ago
Jan DorniakJan Dorniak
7864 silver badges11 bronze badges
7864 silver badges11 bronze badges
add a comment |
add a comment |
Joey Costello is a new contributor. Be nice, and check out our Code of Conduct.
Joey Costello is a new contributor. Be nice, and check out our Code of Conduct.
Joey Costello is a new contributor. Be nice, and check out our Code of Conduct.
Joey Costello is a new contributor. Be nice, and check out our Code of Conduct.
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$begingroup$
Get some thin brass shim stock. Cut into strips and wrap around the diode. A drop of 5-minute epoxy will hold it in place. If the brass doesn't appeal, get some heavyweight paper and use that. 20 pound bond should do pretty well, and if you need more absorption, wind a couple of layers. I expect handling these small pieces will try your patience. Or get some thin-wall tubing of the correct size, cut off a small length and slip over the diode. Again, you won't have fun will the small sizes, so you'll have to be patient.
$endgroup$
– WhatRoughBeast
8 hours ago