A list of the basic electronic components we use in our lab.Most of them come from DigiKey. See also our electronics kits and tools page for more information about the materials and tools in our electronics lab. Also, check out the Adafruit parts wiki and the Fab Lab inventory for more parts.


CR2032: coin cell battery (3V, 20mm diameter).
Also available from Sparkfun.

Rechargeable Li-Po batteries (3.7V) from SparkFun: 20 mAh, 110 mAh, 850 mAh, 1000 mAh (pictured), 2000 mAh, 6000 mAh (6 Ah)

Sewable Electronic Components

sewable batter holder (CR2032)
. Also available from SparkFun.

piezo buzzer (CMT-1603)

AVR Microcontrollers
ATtiny45V: through hole, surface mount (SOIC-8)
ATtiny85V: through hole, surface mount (SOIC-8)
ATtiny84: surface mount (SOIC-14)
ATmega168: through hole, surface mount (TQFP-32)
ATmega328P: through hole [ DK, SF ], surface mount (TQFP-32) [ DK, SF ]
Note that other variations (e.g. ATmega168V or the ATmega328) may be hardware compatible, but aren’t supported by the Arduino software (and may be time-consuming to get set up).

1206 Surface Mount LEDs

White, Green, Blue, Red, Yellow

Axial Surface Mount LEDs

Green, Yellow, Red

Square through hole 4 pin LEDs

White (alternative), Red,

5mm LEDs

Red, Green, Yellow, Blue, White

1206 Surface Mount Resistors 1/4 Watt
100 ohm, 1K, 10K (alt.), 49.9K

Through Hole Resistors 1/4 Watt
1 ohm, 10 ohm, 100 ohm, 500, 1K, 2K, 5.1K, 10K, 100K, 1M, 10M

1206 Surface Mount Capacitors
.001uF, .01uF, .1uF, 0.47uF, 1uF (alt.), 2.2uF, 10uF

Voltage Regulators
SMD: 3.3V 100 mA LDO (SOT23-3), 5V 100 mA LDO (SOT23-3), 5V 1A LDO (SOT-223)
Through Hole: 5V 1.5A (TO-220)


PNP surface mount (less powerful alternative)
NPN surface mount

TIP120, NPN through hole
TIP125, PNP through hole


N-MOSFET (through-hole)

Low Voltage Threshold N-MOSFET (for use with microcontrollers powered at 3.3V or from 3.7V lipo batteries): surface mount, through-hole

LM386: SMD (SOIC-8), Through Hole (DIP-8)

SMD: 12 Mhz (alt.), 20 MHz, 24 MHz (alt.)

SMD: 16 MHz (alt.), 20 MHz, 24 MHz

Female (0.1″): breakaway (32-position), taller but non-breakaway (50-position)
Male (0.1″): right-angle SMD (36-position)

vibrator motors
tiny cheap servos

LDR (Light Sensor):
Thermistor (Temperature Sensor):
Push Button:

Copper Tape (1/4″)
Daburn: super fine very flexible wire
McMaster: super fine very flexible wire
fiber optic filament
thermochromic ink
liquid crystal ink