@Koresh can you give us an ETA of the sensor? I'm looking forward to buy some
Posts made by hensing
RE: 💬 MySensors Stable Node
@Sander-Teunissen you can modify the motion sensor to work on 3.3V (see http://www.instructables.com/id/Convert-a-5v-PIR-Motion-Sensor-to-33v-for-ESP8266/)
RE: Power external sensors on demand
Thank you for you quick response!
I tried to use the TTL directly and it works
But now I'm afraid that I could kill the arduino by doing this all the time.
The moisture sensor used here is a sensor of this type ebay article with a LM393 comparator chip.
Power external sensors on demand
I'm new to mysensors and wonder myself if it's possible to power up an external sensor (moisture, rain, etc.) only on demand just a few seconds before the readout.
As the most external sensors come with their own PCB / μC they drain battery. So my idea here was to power them up when I really need them with
- a transistor
- or a MOSFET
by pulling up the gate with a digital output of the arduino.
Do you have any experiences which MOSFET (and additional resistors, preferably not SMD) are well suited to switch the sensors on with an 3,3 V arduino mini pro TTL?
Many thanks in advance