Re:Firefly – An open-source $5 DIY hardware wallet
by escherize on Wednesday August 02, 2017 @09:59PM
(#14916374)
Could someone explain how this costs $5? Does that mean if you already have most of the parts laying around? I'm actually curious.
[ Parent
| on HN ]
Re:Firefly – An open-source $5 DIY hardware wallet
by sowbug on Wednesday August 02, 2017 @10:53PM
(#14916607)
radio + application processor $3.18 https://m.aliexpress.com/item/1387904044.html
OLED $2.59 https://m.aliexpress.com/s/item/32233342471.html
The rest is passive junk that's probably about 25¢.
That's more than $5, but this is what 120 seconds of searching on AliExpress turned up.
Software is where a lot of the value comes from. I assume it's using a clever hack like http://dmitry.gr/index.php?r=05.Projects&proj=11.%20Bluetoot...
Re:Firefly – An open-source $5 DIY hardware wallet
by painted on Thursday August 03, 2017 @09:32AM
(#14919366)
well:
arduino [1]: 1.38$
nrf [2]: 0.55$
oled [3]: 2.33$
------------------
total: 4.26$
like you said the passive components are pretty cheap, and you stay under 5$.
[1] https://www.aliexpress.com/item/EYEWINK-1pcs-lot-ATMEGA328P-... [2] https://www.aliexpress.com/item/LCD-Board-T420XW01-V2-06A39-... [3] https://www.aliexpress.com/item/Free-Shipping-Blue-0-96-inch...