Step 1: Preparation
+ basic soldering
+ zero programming skills
+ a plant
+ an Arduino
+ 4-10 LEDs
+ resistors ( one 10k Ω and 4-10 220Ω if it is a red LED)
+ dozens of jumper wires
* We highly recommend you to use smaller LEDs such as 3 mm LED and thinner jumper wire so they can be nicely hiden in the plant.
+ Soldering iron and solder
Step 2: Soldering
+ blend both legs of all LEDs horizentally
+ solder both legs with jumper wires and a 220 Ω resistor on either side.
( Don‘t forget to take a look at the long (+) and short (-) legs of LEDs. Legs with the same polarity should be placed in the same side)
Step 3: Build the Circuit on Arduino
+ connect LEDs to PWM pin like D3 and to the ground
+ connect a 10k resistor to D8 and D7
+ connect a wire to D8 and to the plant in its stem
Step 4: Complete Programming on Mind+
Instead of writing codes on IDE, you can easily make a program with only 3 software modules for this project, Capacity Sensor, IF and LED.
Capacity Sensor-- to detect if a hand touch the plant
IF -- to evaluate the condition
LED -- If a hand touch the plant, then LED lights up.
You can download our free software Mind+ (available on windows, Mac and Linux) and follow the instruction in the picture above.
Step 5: Place LEDs on the Plant
If your light is not stable, try to connect the electronity on the ground, like charge your laptop.