Introduction: Plant Watering Warning
a super simple circuit for plants
Step 1: Part List
- a PNP transistor (i use CBF493S)
- a N-channel mosfet (i use 4800BDY)
- a trimmer 100k
- resistor 10k
- resistor 1k
- a led (i use a flash led)
- small battery 3.6v
- 2 stainless steel probes
Step 2: Circuit Diagram
you can use most of pnp transistor and N-channel mosfet..
you can adjust the sensitivity with the trimmer
Step 3: Print the Pcb
print the pcb, or make yours for the parts you have
Step 4: Solder the Parts
add a 3 pin connector for the battery
Step 5: Build It
place the probes on a plastic with hot glue
place the pcb
- you can add a test switch between the probes
- add a nice box for the circuit
- you can recharge the battery (i dont know when)
Step 6: End
when the plan need water the led flashing (if you use flashing led)
--you must adjust the trimmer--
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5 years ago
Good job, Just a few questions, Your transistor, stainless steel probes i cant seem to find one online would you perhaps be able to send me a link?
Why dont you consider adding in a mini solar panel?
5 years ago
Excellent!, no more dry plants!
Reply 5 years ago
yes...! but i must to see how it will go in the future!