3 ms·
“ I will ignore the “powered from mains” requirement for this round of the board and feed in 5V elsewhere.” I feel this will be a challenge. The wall wart is t
by hans-moleman 5y ago
“ I will ignore the “powered from mains” requirement for this round of the board and feed in 5V elsewhere.”
I feel this will be a challenge. The wall wart is the size it is because that’s the size of a transformer/rectifier for 120/240 to 5v. Trying to add a Linux machine to that but keep the same size is the tricky part.
- Epskampie 5y agoThe example he shows is pretty big (but not suspisiously big) https://miro.medium.com/max/720/0*jUoQD3Udknc9b5Lx.jpg https://miro.medium.com/max/720/0*jUoQD3Udknc9b5Lx.jpg Since there are a lot smaller chargers out there this should still be possible. https://store.storeimages.cdn-apple.com/4668/as-images.apple.com/is/MU7V2_GEO_EMEA?wid=1144&hei=1144&fmt=jpeg&qlt=95&.v=1544468120362 https://store.storeimages.cdn-apple.com/4668/as-images.apple...
- dijit 5y agoI’m sure there’s something that can be done with Gallium Nitride. The chargers coming from that method are many times smaller than the contemporary. Often you can get a 90w charger where a 40w charger used to fit. https://www.howtogeek.com/509209/what-is-a-gan-charger-and-why-will-you-want-one/ https://www.howtogeek.com/509209/what-is-a-gan-charger-and-w...
- sokoloff 5y agoSeveral smart plugs run OpenWRT already.
- fy20 5y agoIKEA Koppla chargers would be perfect for this. https://www.ifixit.com/Guide/IKEA+KOPPLA+Connector+(fix)/126573 https://www.ifixit.com/Guide/IKEA+KOPPLA+Connector+(fix)/126... I expect you could even fit a Raspberry Pi Zero inside if you replaced the charger electronics with something smaller.
- zibzab 5y agoTransformers are fairly uncommon these days due low efficiency and large size. You can build a much smaller (1-3 cm3) and more efficient system using more modern technology.