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- Thu Apr 12, 2018 3:15 am
- Forum: Raspberry Pi Expansion Boards
- Topic: Multiple Pulse Reader Hat
- Replies: 1
- Views: 1378
You can go direct into the GPIO, will need to use hardware or software pull ups, or if the water meters output a voltage pulse you may need to reduce it to 3.3 volts max. I am using a pi on my boat which monitors (among a host of other stuff) two engine tachos. The tacho pickups are magnet/hall effe...