5 ms·

Oddly enough, the "energy harvesting switches" they used in this are commercial products! https://www.digikey.com/en/products/detail/zf-electronics/AFIG-0007/52

Oddly enough, the "energy harvesting switches" they used in this are commercial products! https://www.digikey.com/en/products/detail/zf-electronics/AFIG-0007/5250515 https://www.digikey.com/en/products/detail/zf-electronics/AF... https://switches-sensors.zf.com/us/product/energy-harvesting-generators/ https://switches-sensors.zf.com/us/product/energy-harvesting...

testmasterflex 4y ago
Love this kind of stuff. I made this slim PCB a few years ago with a super tiny NFC chip on it that can harvest energy from NFC: https://youtu.be/_BSfO9LAIqg https://youtu.be/_BSfO9LAIqg Made it into a business card as you can see.
- rexreed 4y ago
  I'd love to make that as well or find a source for it. Curious as to costs to manufacture and ease of reproducibility. Any tips / pointers / guides?
  - testmasterflex 4y ago
    Can’t find the tutorial I used but here is one https://reddit.com/r/electronics/comments/efz9xf/my_nfc_powered_blinky_business_card/ https://reddit.com/r/electronics/comments/efz9xf/my_nfc_powe...
    - deleted 4y ago
      [deleted]
    - rexreed 4y ago
      I found this one: https://www.instructables.com/PCB-Business-Card-With-NFC/ https://www.instructables.com/PCB-Business-Card-With-NFC/ Looks closer to yours? Not sure how you did the 24k gold part tho ;)
      - testmasterflex 4y ago
        Yes, that’s the one I used afaik. The gold is one of the materials you can choose to plate your copper on the board at manufacturing. “Enig”. Increases conductivity but also looks sexy :D I think every board was $8 on MOQ.
        rexreed 4y ago
        awesome - thanks - going to pull this together!
- seedboot 4y ago
  now use that energy to mine bitcoin and you'll be rolling in ~~money~~ decimal places before you know it!
  - testmasterflex 4y ago
    A big ass inductor sucking up all phone batteries from the whole neighbourhood. On it.
RockRobotRock 4y ago
is this how they make wireless doorbells that dont need a battery?
Aachen 4y ago
Neither lists a price, and it seems the former has a minimum quantity of "5,000" which I take to mean 5'000 but might be localised to mean 5, you never know
- pqb 4y ago
  The Mouser website says 5000, not 5, unfortunately. Do you know if there is a retailer that sells them in smaller quantities (like <100)?
  - sbierwagen 4y ago
    Oops, sorry, thought I linked to one of the pages that show price. Octopart has a few: https://octopart.com/search?q=AFIG-0007&currency=USD&specs=0 https://octopart.com/search?q=AFIG-0007&currency=USD&specs=0 Around fifteen bucks each.
planede 4y ago
From the datasheet: > Energy Generated: 0.33 mWs actuating and releasing I assume it means that it generates 0.33 mWs (or mJ, come on) in a full cycle of actuating and releasing. So you have to make 3 button presses per second to generate 1 mW of power.

testmasterflex 4y ago

Love this kind of stuff. I made this slim PCB a few years ago with a super tiny NFC chip on it that can harvest energy from NFC: https://youtu.be/_BSfO9LAIqg https://youtu.be/_BSfO9LAIqg Made it into a business card as you can see.

rexreed 4y ago
I'd love to make that as well or find a source for it. Curious as to costs to manufacture and ease of reproducibility. Any tips / pointers / guides?
- testmasterflex 4y ago
  Can’t find the tutorial I used but here is one https://reddit.com/r/electronics/comments/efz9xf/my_nfc_powered_blinky_business_card/ https://reddit.com/r/electronics/comments/efz9xf/my_nfc_powe...
  - deleted 4y ago
    [deleted]
  - rexreed 4y ago
    I found this one: https://www.instructables.com/PCB-Business-Card-With-NFC/ https://www.instructables.com/PCB-Business-Card-With-NFC/ Looks closer to yours? Not sure how you did the 24k gold part tho ;)
    - testmasterflex 4y ago
      Yes, that’s the one I used afaik. The gold is one of the materials you can choose to plate your copper on the board at manufacturing. “Enig”. Increases conductivity but also looks sexy :D I think every board was $8 on MOQ.
      - rexreed 4y ago
        awesome - thanks - going to pull this together!
seedboot 4y ago
now use that energy to mine bitcoin and you'll be rolling in ~~money~~ decimal places before you know it!
- testmasterflex 4y ago
  A big ass inductor sucking up all phone batteries from the whole neighbourhood. On it.

RockRobotRock 4y ago

is this how they make wireless doorbells that dont need a battery?

Aachen 4y ago

Neither lists a price, and it seems the former has a minimum quantity of "5,000" which I take to mean 5'000 but might be localised to mean 5, you never know

pqb 4y ago
The Mouser website says 5000, not 5, unfortunately. Do you know if there is a retailer that sells them in smaller quantities (like <100)?
- sbierwagen 4y ago
  Oops, sorry, thought I linked to one of the pages that show price. Octopart has a few: https://octopart.com/search?q=AFIG-0007&currency=USD&specs=0 https://octopart.com/search?q=AFIG-0007&currency=USD&specs=0 Around fifteen bucks each.

planede 4y ago

From the datasheet: > Energy Generated: 0.33 mWs actuating and releasing I assume it means that it generates 0.33 mWs (or mJ, come on) in a full cycle of actuating and releasing. So you have to make 3 button presses per second to generate 1 mW of power.