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SRAM eTap Blips - Question
I would like to know if the Sram blips - is just a momentary push button switch or is there additional electronics in it ?
If its just a momentary SPST switch - is the connector something i can but off the shelf like digikey or alike Thanks in advance |
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#2
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SRAM eTap Blips - Question
On Sat, 15 Sep 2018 15:30:23 -0700 (PDT), ixiz
wrote: I would like to know if the Sram blips - is just a momentary push button switch or is there additional electronics in it ? If its just a momentary SPST switch - is the connector something i can but off the shelf like digikey or alike Thanks in advance According to this video: https://www.youtube.com/watch?v=2grLsmNIcaY it's a simple normally open momentary switch. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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SRAM eTap Blips - Question
On Sat, 15 Sep 2018 15:30:23 -0700 (PDT), ixiz
wrote: I would like to know if the Sram blips - is just a momentary push button switch or is there additional electronics in it ? If its just a momentary SPST switch - is the connector something i can but off the shelf like digikey or alike Thanks in advance The connector is obscure but quite standard. It's called an: EIAJ-01 plug which is 2.35mm OD, 0.70mm ID. The rubber part seems to be (not sure) 5.0mm OD and about 11.5mm long. Likely substitutes: https://en.wikipedia.org/wiki/Coaxial_power_connector https://en.wikipedia.org/wiki/EIAJ_connector available as: Philmore 48-410 https://www.google.com/search?q=Philmore+48-410 Lundberg 1636 01 https://www.google.com/search?q=Lumberg+1636+01 Kobiconn 3218-EX https://www.google.com/search?q=Kobiconn+3218-EX However, I'm not sure about the dimension of the rubber part of the connector, and have no idea if any of these connectors will fit without modification. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#4
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SRAM eTap Blips - Question
On 9/15/2018 7:36 PM, Jeff Liebermann wrote:
On Sat, 15 Sep 2018 15:30:23 -0700 (PDT), ixiz wrote: I would like to know if the Sram blips - is just a momentary push button switch or is there additional electronics in it ? If its just a momentary SPST switch - is the connector something i can but off the shelf like digikey or alike Thanks in advance The connector is obscure but quite standard. It's called an: EIAJ-01 plug which is 2.35mm OD, 0.70mm ID. The rubber part seems to be (not sure) 5.0mm OD and about 11.5mm long. Likely substitutes: https://en.wikipedia.org/wiki/Coaxial_power_connector https://en.wikipedia.org/wiki/EIAJ_connector available as: Philmore 48-410 https://www.google.com/search?q=Philmore+48-410 Lundberg 1636 01 https://www.google.com/search?q=Lumberg+1636+01 Kobiconn 3218-EX https://www.google.com/search?q=Kobiconn+3218-EX However, I'm not sure about the dimension of the rubber part of the connector, and have no idea if any of these connectors will fit without modification. FWIW, I had to fabricate a plug for an oddball 12V DC connector for an old piece of equipment. After cobbling together the metal contacts, I used Sugru to mold a rubberish plug that held the contacts in the right position. It's worked well. -- - Frank Krygowski |
#5
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SRAM eTap Blips - Question
On 9/15/2018 10:32 PM, Frank Krygowski wrote:
On 9/15/2018 7:36 PM, Jeff Liebermann wrote: On Sat, 15 Sep 2018 15:30:23 -0700 (PDT), ixiz wrote: I would like to know if the Sram blips - is just a momentary push button switchÂ* or is there additional electronics in it ? If its just a momentary SPST switch - is the connector something i can but off the shelf like digikey or alike Thanks in advance The connector is obscure but quite standard.Â* It's called an: Â*Â*Â* EIAJ-01 plug which is 2.35mm OD, 0.70mm ID. The rubber part seems to be (not sure) 5.0mm OD and about 11.5mm long. Likely substitutes: https://en.wikipedia.org/wiki/Coaxial_power_connector https://en.wikipedia.org/wiki/EIAJ_connector available as: Philmore 48-410 https://www.google.com/search?q=Philmore+48-410 Lundberg 1636 01 https://www.google.com/search?q=Lumberg+1636+01 Kobiconn 3218-EX https://www.google.com/search?q=Kobiconn+3218-EX However, I'm not sure about the dimension of the rubber part of the connector, and have no idea if any of these connectors will fit without modification. FWIW, I had to fabricate a plug for an oddball 12V DC connector for an old piece of equipment. After cobbling together the metal contacts, I used Sugru to mold a rubberish plug that held the contacts in the right position. It's worked well. Link: https://sugru.com/ -- - Frank Krygowski |
#6
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SRAM eTap Blips - Question
On Sat, 15 Sep 2018 22:32:23 -0400, Frank Krygowski
wrote: FWIW, I had to fabricate a plug for an oddball 12V DC connector for an old piece of equipment. After cobbling together the metal contacts, I used Sugru to mold a rubberish plug that held the contacts in the right position. It's worked well. Yep, that will work. I've used Sugru a few times but found it to be rather expensive. So, I use RTV, Devcon something hard rubber molding goo, Bondo (for a rock hard connector), https://makezine.com/projects/make-40/fond-o-bondo/ various casting compounds, some weird stuff I picked up at a crafts fai https://www.smooth-on.com urethane molding goo, acrylic resin, etc. For contacts, I use the remains of the old power connector, or I fabricate something out of brass strips, tubing, and shrink tube for insulation. Just about any casting compound will work, as long as you use sufficient mold release to keep it from sticking to the form. I made about ten crude power connectors using slightly tapered holes drilled into a block of wood as a form. The first 10 connectors came out of the mold easily. However, I forgot to add more mold release on the 2nd batch and had to chisel the connectors out of the forms. No matter how much I sand or tape the shells, I continue to get splinters in my fingers when I forget and just grab the shell. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#7
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SRAM eTap Blips - Question
On 9/16/2018 12:39 AM, Jeff Liebermann wrote:
On Sat, 15 Sep 2018 22:32:23 -0400, Frank Krygowski wrote: FWIW, I had to fabricate a plug for an oddball 12V DC connector for an old piece of equipment. After cobbling together the metal contacts, I used Sugru to mold a rubberish plug that held the contacts in the right position. It's worked well. Yep, that will work. I've used Sugru a few times but found it to be rather expensive. So, I use RTV, Devcon something hard rubber molding goo, Bondo (for a rock hard connector), https://makezine.com/projects/make-40/fond-o-bondo/ various casting compounds, some weird stuff I picked up at a crafts fai https://www.smooth-on.com urethane molding goo, acrylic resin, etc. For contacts, I use the remains of the old power connector, or I fabricate something out of brass strips, tubing, and shrink tube for insulation. Just about any casting compound will work, as long as you use sufficient mold release to keep it from sticking to the form. I made about ten crude power connectors using slightly tapered holes drilled into a block of wood as a form. The first 10 connectors came out of the mold easily. However, I forgot to add more mold release on the 2nd batch and had to chisel the connectors out of the forms. No matter how much I sand or tape the shells, I continue to get splinters in my fingers when I forget and just grab the shell. I agree, the Sugru stuff is very expensive. When I heard about it I thought "Oh, I'll buy some to try..." but the price seemed exorbitant. Then I was given a pack of six or eight little sample envelopes as a birthday gift. I've used two of them, and they worked well, but I notice the rest are now past their expiration date. Bondo seems like a good idea. A friend showed me that it's probably the best wood filler available, assuming you'll be painting instead of staining and varnishing. If you time it right, you can sand it to shape very easily while it's partially set. -- - Frank Krygowski |
#8
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SRAM eTap Blips - Question
On 9/16/18 4:33 AM, Frank Krygowski wrote:
On 9/15/2018 10:32 PM, Frank Krygowski wrote: On 9/15/2018 7:36 PM, Jeff Liebermann wrote: On Sat, 15 Sep 2018 15:30:23 -0700 (PDT), ixiz wrote: I would like to know if the Sram blips - is just a momentary push button switchÂ* or is there additional electronics in it ? If its just a momentary SPST switch - is the connector something i can but off the shelf like digikey or alike Thanks in advance The connector is obscure but quite standard.Â* It's called an: Â*Â*Â* EIAJ-01 plug which is 2.35mm OD, 0.70mm ID. The rubber part seems to be (not sure) 5.0mm OD and about 11.5mm long. Likely substitutes: https://en.wikipedia.org/wiki/Coaxial_power_connector https://en.wikipedia.org/wiki/EIAJ_connector available as: Philmore 48-410 https://www.google.com/search?q=Philmore+48-410 Lundberg 1636 01 https://www.google.com/search?q=Lumberg+1636+01 Kobiconn 3218-EX https://www.google.com/search?q=Kobiconn+3218-EX However, I'm not sure about the dimension of the rubber part of the connector, and have no idea if any of these connectors will fit without modification. FWIW, I had to fabricate a plug for an oddball 12V DC connector for an old piece of equipment. After cobbling together the metal contacts, I used Sugru to mold a rubberish plug that held the contacts in the right position. It's worked well. Link: https://sugru.com/ Wouldn't hot glue do the job at a fraction of the price |
#9
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SRAM eTap Blips - Question
On Sunday, September 16, 2018 at 1:37:34 PM UTC-4, Tosspot wrote:
On 9/16/18 4:33 AM, Frank Krygowski wrote: FWIW, I had to fabricate a plug for an oddball 12V DC connector for an old piece of equipment. After cobbling together the metal contacts, I used Sugru to mold a rubberish plug that held the contacts in the right position. It's worked well. Link: https://sugru.com/ Wouldn't hot glue do the job at a fraction of the price? Depends on the task, I think. I remember casting some little gizmo out of hot melt glue, a lens cap for a pair of binoculars. I had to fashion a mold, then carefully inject the glue into the mold. My mold was open on top, and I spent a fair amount of time trying to layer in a reasonably flat top surface. The result was workable, but it was pretty crude looking. The benefit of Sugru (and, if applicable, Bondo) is that you can mold it to shape using your fingers. Instead of casting, it's more like sculpting with clay. - Frank Krygowski |
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SRAM eTap Blips - Question
On Sun, 16 Sep 2018 19:37:32 +0200, Tosspot
wrote: Wouldn't hot glue do the job at a fraction of the price Good idea. Hot melt glue melts at 120C so there's plenty of temperature margin. I've tried to mold hot melt glue and failed because since it's a glue, it stuck to the mold. It might need to be reflowed with a hot air gun in order to get a smooth surface. Maybe some outer reinforcing, like a plastic soda straw. It also doesn't flex very well: http://www.learnbydestroying.com/jeffl/pics/hot-melt-glue/index.html My rubber sole repair job fell apart after about one week. That makes me suspect that bending the hot melt glue connector shell might cause it to crack. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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