Quantity   Component name
1 × MSP430G2452 microcontroller (TSSOP14) Runs off a standard LiIon without any regulator ! Free sample from TI
1 × 2N3904 (SOT23) Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs
8 × Blue LEDs (PLCC2) The PLCC2 ones are brighter and can be sourced easily
1 × ULN2803 (8 Ch. Darlington) MSP430 cant output enough juice to run all the LEDs
1 × 8mm 0.5W White LED The brightest one that satisfies the requirement ! 1 W is likely to heat a lot and smaller ones are kiddos
1 × Single sided copper clad
1 × Photopaper
1 × Etching solution
1 × 40xx switch to toggle the mode! Bigger one as it can be easily located under the T-shirt
1 × SPDT On/Off switch
1 × LiIOn battery from old phone I used old ones
1 × 0.1uF caps (0805 smd)
8 × 100 ohm (0805)
2 × 10k ohm (0805)
1 × wires
1 × hot glue
1 × velcro
1 × perfboard
1 × MSP430 Launchpad