r/ArduinoProjects

My arduino watch

I made a watch, it took me two days. It runs on a 24 hour clock I am very happy it works. It has a basic rtc module and a copy arduino uno r3

u/Honest_Role_5078 — 10 days ago

▲ 1 r/ArduinoProjects

Two Arduinos, Two Wires, No Extra Power Can Two Arduinos Talk Over Their Power Wires for data communication (voltage vs current modulation)?

I’m trying to make two Arduinos talk over the same two wires, with the slave getting its power from the master.

Master → Slave:

24 V = 1, 12 V = 0. A buck gives the slave 5 V from these supply line but it varies 24/12 also a voltage divider scales down voltage variation and decode bits.

Slave → Master:

50 mA = 0, 70 mA = 1 for 0.5 sec. A Hall sensor detects the current change in master, created by a constant load grounded for 20 ma to make data communication

So the same two wires carry power + two-way data. Is this practical, or is there a simpler way or references?

reddit.com

u/Relevant_Pumpkin9190 — 9 days ago