Hacker News
new
|
past
|
comments
|
ask
|
show
|
jobs
|
submit
|
from
login
Using a Raspberry Pi and LED to send morse code to a smartphone
(
dmtechtalk.wordpress.com
)
43 points
by
onli
on Oct 19, 2019
|
past
|
13 comments
Guidelines
|
FAQ
|
Lists
|
API
|
Security
|
Legal
|
Apply to YC
|
Contact
Search:
