S.BatessChangePurse History
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The movement of the lid was neglected in the design so the exposed LED mounts may short circuit with the conductive parts of the lid when moved. This could be fixed with a simple nonconductive covering over the mounts. Also since the LED is sewn onto the same fabric as the rest of the lid, the LED may tilt up as opposed to down into the purse. This could be fixed by pushing the LED farther into the purse and bending it further into the purse before sewing down the mounts. Finally, the lid requires a hook on the inside to clasp the purse closed during transit.
The movement of the lid was neglected in the design, so the exposed LED mounts may short circuit with the conductive parts of the lid when moved. This could be fixed with a simple nonconductive covering over the mounts. Also since the LED is sewn onto the same fabric as the rest of the lid, the LED may tilt up as opposed to down into the purse. One solution might be pushing the LED farther into the purse and bending it further into the purse before sewing down the mounts. Finally, the lid requires an inside hook to clasp the purse closed during transit.
The body of the purse is regular yarn crocheted in the round followed by a rim of a crocheted strip of stretch conductive yarn. The two are bound together with a crochet stitch. The rim has a resistance of 300 kilo-ohms unstretched and 50 ohms stretched. In this way it acts as a stretch sensor. The lid is sewn from conducting and non conducting fabrics with a neoprene battery holder embedded.
The body of the purse is regular yarn crocheted in the round followed by a rim of a crocheted strip of stretch conductive yarn. The two are bound together with a crochet stitch. The rim has a resistance of 300 kilo-ohms unstretched and 50 ohms stretched. In this way it acts as a stretch sensor. The lid is sewn from conducting and non conducting fabrics with a neoprene battery holder embedded. When a conductive thread was used (as in connecting the battery terminal to the rest of the circuit), at least one other path was also sewn. This ensures that even if the purse experiences a small tear, the circuit may still survive.
The movement of the lid was neglected in the design so the exposed LED mounts may short circuit with the conductive parts of the lid when moved. This could be fixed with a simple nonconductive covering over the mounts. Also since the LED is sewn onto the same fabric as the rest of the
The movement of the lid was neglected in the design so the exposed LED mounts may short circuit with the conductive parts of the lid when moved. This could be fixed with a simple nonconductive covering over the mounts. Also since the LED is sewn onto the same fabric as the rest of the lid, the LED may tilt up as opposed to down into the purse. This could be fixed by pushing the LED farther into the purse and bending it further into the purse before sewing down the mounts. Finally, the lid requires a hook on the inside to clasp the purse closed during transit.
- Snap purse flab to back of purse
- Snap purse flap to back of purse
The body of the purse is regular yarn crocheted in the round followed by a rim of a crocheted strip of stretch conductive yarn. The two are bound together with a crochet stitch. The rim has a resistance of 300 k ohms unstretched and 50 ohms stretched. In this way it acts as a stretch sensor. The lid is sewn from conducting and non conducting fabrics with a neoprene battery holder embedded.
The body of the purse is regular yarn crocheted in the round followed by a rim of a crocheted strip of stretch conductive yarn. The two are bound together with a crochet stitch. The rim has a resistance of 300 kilo-ohms unstretched and 50 ohms stretched. In this way it acts as a stretch sensor. The lid is sewn from conducting and non conducting fabrics with a neoprene battery holder embedded.
The movement of the lid was neglected in the design so the exposed LED mounts may short circuit with the conductive parts of the lid when moved. This could be fixed with a simple nonconductive covering over the mounts.
The movement of the lid was neglected in the design so the exposed LED mounts may short circuit with the conductive parts of the lid when moved. This could be fixed with a simple nonconductive covering over the mounts. Also since the LED is sewn onto the same fabric as the rest of the
http://newtextiles.media.mit.edu/uploads/S/Summary1.jpg
http://newtextiles.media.mit.edu/uploads/S/Smaller1.jpg
http://newtextiles.media.mit.edu/uploads/S/Circuit.jpg
http://newtextiles.media.mit.edu/uploads/S/Smaller2.jpg
Role of Conductive Fabrics
Role of Conductive Fabrics
Circuit:
Circuit
Construction The body of the purse is regular yarn crocheted in the round followed by a rim of a crocheted strip of stretch conductive yarn. The two are bound together with a crochet stitch. The rim has a resistence of 300 k ohms unstretched and 50 ohms stretched. In this way it acts as a stretch sensor. The lid is sewn from conducting and non conducting fabrics with a neoprene battery holder embedded.
Opportunities for Improvement In
Construction The body of the purse is regular yarn crocheted in the round followed by a rim of a crocheted strip of stretch conductive yarn. The two are bound together with a crochet stitch. The rim has a resistance of 300 k ohms unstretched and 50 ohms stretched. In this way it acts as a stretch sensor. The lid is sewn from conducting and non conducting fabrics with a neoprene battery holder embedded.
Opportunities for Improvement The movement of the lid was neglected in the design so the exposed LED mounts may short circuit with the conductive parts of the lid when moved. This could be fixed with a simple nonconductive covering over the mounts.
Change Purse Summary
Change Purse Summary
This change purse helpfully illuminates the inside of a purse if it senses the user stretch the rim of the purse as they try to find change in frustratingly dark situations.
Role of Conductive Fabrics
Circuit
Role of Conductive Fabrics In this project we take advantage of textiles as optimum engineering materials that provide integrated functionality, parallel construction leading to robustness, and user friendly softness.
Circuit:
The body of the purse is regular yarn crocheted in the round followed by a rim of a crocheted strip of stretch conductive yarn. The two are bound together with a crochet stitch. The rim has a resistence of 300 k ohms unstretched and 50 ohms stretched. In this way it acts as a stretch sensor. The lid is sewn from conducting and non conducting fabrics with a neoprene battery holder embedded.
In
In
Role of Conductiive Fabrics
_______________________________________________________________________________________________ Role of Conductive Fabrics
Opportunities for Improvement
Opportunities for Improvement In
Change Purse Summary
Change Purse Summary
Features
Operating Instructions
- Snap purse flab to back of purse
- Stretch rim of purse
- Use light to find exact change
Features
- The sensor translates the user's intent into a helpful LED light
- The snap switch leads to environmentally friendly battery power conservation
- With exception of LED and battery, entirely soft construction
- Use of crocheting, duplicate wiring, conductive fabrics lead to continued operation even under wear
- Battery may be replaced
http://newtextiles.media.mit.edu/uploads/S/Summary1.jpg
http://newtextiles.media.mit.edu/uploads/S/Circuit.jpg
Change Purse Summary
Features
Role of Conductiive Fabrics
Circuit
Construction
Opportunities for Improvement