Heart Kit Tutorial
Nothing says Staylin' Alive like a heart beat! Build this fun kit and show it off to all of your friends. By bumping the PCB, you will light up an LED that will fade out, visualizing a heart beat.
Special thanks goes out to @highenergybeams for designing this kit and allowing us to use the design in our subscription boxes! Check out this video interview with him about electronics!
First, you should refresh yourself on soldering safety!
WARNING: SOLDERING IRONS ARE HOT. SOLDERING IRONS ARE NOT TOYS. ALWAYS WEAR EYE PROTECTION WHILE USING A SOLDERING IRON.
Transistor → The transistor allows us to amplify the charge from the capacitor to turn on the LED and fade it out.
Count all of your parts and verify everything is in your kit.
Locate the 100k ohm resistor. Bend the leads and install into the location marked R1 (100k).
Take the transistor, bend the legs slightly outward, and install into the Q1 location, labeled 2N3904. Be sure to align it correctly.
Bend the legs 90 degrees on the vibration sensor, and install it into the hole on the right side of the PCB. Be sure to align the legs into the correct holes based on size.
Install the Red LED into the center of the board, making sure to install the LONG LEG into the + marked hole. If you install the LED Backwards, it will NOT light up.
Install the 1uF capacitor into the location directly above the transistor. BE SURE to install the white stripe leg into the white stripe hole marked on the PCB.
Flip the PCB over and install the battery holder. Solder each pin on the front of the PCB.
Install the battery, and tap the PCB. Your LED should light up and then fade out, simulating a heart beat. Clip the lanyard into the hole on the PCB, and go show off your kit to everyone! Thanks for hanging out with us and building another fun kit!