Parts library
35 footprints with symbols, 3D bodies, and distributor links. Helix only places parts that exist here.
ESP32-WROOM-32
Module 18×25.5ESP32-WROOM-32
Dual-core Wi-Fi + BLE module with 4 MB flash. The workhorse IoT radio.
$2.8548,210 stockESP32-C3-MINI-1
Module 13.2×16.6ESP32-C3-MINI-1-N4
RISC-V Wi-Fi + BLE module. Smaller, cheaper, plenty for sensors and LEDs.
$1.6539,102 stockRP2040
QFN-56 7×7RP2040
Dual-core Cortex-M0+ with PIO. Excellent for USB gadgets and macropads.
$0.840120,440 stocknRF52840
AQFN-73 7×7NRF52840-QIAA-R
Bluetooth 5.3 / 802.15.4 SoC. The standard for beacons and wearables.
$3.4022,190 stockBME280
LGA-8 2.5×2.5BME280
Temperature, humidity, and barometric pressure over I2C/SPI.
$2.1215,402 stockSHT30-DIS
DFN-8 2.5×2.5SHT30-DIS-B
High-accuracy digital humidity and temperature sensor.
$2.459,800 stockMPU-6050
QFN-24 4×4MPU-6050
6-axis IMU: 3-axis gyro + 3-axis accelerometer, I2C.
$1.2824,012 stockSSD1306 OLED 0.96"
Module 27×26SSD1306-096
128×64 monochrome OLED, I2C. Tiny status display.
$2.6031,000 stockWS2812B
5050WS2812B
Addressable RGB LED, 5V, one-wire data.
$0.120250,000 stockINA219
SOT-23-8INA219AIDCNR
12-bit I2C current / voltage / power monitor.
$1.558,700 stockAP2112K-3.3
SOT-23AP2112K-3.3TRG1
600 mA low-noise 3.3 V LDO. Default rail for USB-powered 3V3 boards.
$0.18018,018 stockAMS1117-3.3
SOT-23AMS1117-3.3
Classic 1 A 3.3 V LDO. Needs a 22 µF output cap.
$0.09018,009 stockTP4056
SOP-8TP4056
1 A linear Li-ion charger with charge/status pins.
$0.14088,000 stockUSB-C Receptacle 16P
USB-C 16PTYPE-C-31-M-12
16-pin mid-mount USB-C. Enough for USB2 + CC resistors + VBUS.
$0.220142,000 stockJST-PH 2P
JST-PH-2S2B-PH-K-S
2.0 mm pitch battery / accessory header.
$0.11067,000 stock2.54 mm Header 1×8
TH 1×8HDR-1X8-2.54
Breakout / debug pin header.
$0.080500,000 stockTactile switch 6 mm
6×6TS-1187A-B-A-B
SPST momentary, 6×6 mm, 160 gf.
$0.040210,000 stockLED 0603 Green
060319-217/GHC-YR1S2/3T
Green indicator LED, 20 mA.
$0.030400,000 stockLED 0603 Red
060319-217/R6C-AL1M2VY/3T
Red indicator LED, 20 mA.
$0.030380,000 stockAO3400 N-MOSFET
SOT-23AO3400
30 V 5.7 A N-channel MOSFET, logic-level gate. Load switch / LED drive.
$0.060190,000 stockSS14 Schottky
SMASS14
40 V 1 A Schottky diode. Reverse polarity / OR-ing.
$0.050220,000 stock12 MHz crystal
3225X322512MSB4SI
12 MHz 18 pF SMD crystal for USB MCUs.
$0.08054,000 stockFerrite bead 0603 600Ω
0603BLM18PG601SN1D
Power-rail ferrite, 600 Ω @ 100 MHz.
$0.04098,000 stockCR2032 holder
CR2032BS-6-1
SMD coin-cell holder for BLE beacons.
$0.35012,000 stockW25Q16JV flash
SOIC-8W25Q16JVSNIQ
16 Mbit SPI flash. Required by RP2040 for program storage.
$0.28064,000 stockTXS0108E
TSSOP-20TXS0108EPWR
8-bit bidirectional 3.3 V ↔ 5 V level shifter.
$0.42019,000 stock10 kΩ 0603
0603RC0603FR-0710KL
10k 0603 1% thick-film resistor
$0.0041,200,000 stock1 kΩ 0603
0603RC0603FR-071KL
1k 0603 1% thick-film resistor
$0.0041,100,000 stock220 Ω 0603
0603RC0603FR-07220RL
220 0603 1% thick-film resistor
$0.004900,000 stock5.1 kΩ 0603
0603RC0603FR-075K1L
5.1k 0603 1% thick-film resistor
$0.005640,000 stock100 kΩ 0603
0603RC0603FR-07100KL
100k 0603 1% thick-film resistor
$0.004800,000 stock100 nF 0603
0603CC0603KRX7R9BB104
100n 0603 X7R ceramic capacitor
$0.0062,000,000 stock10 µF 0603 16V
0603CL10A106KO8NNNC
10u 0603 X7R ceramic capacitor
$0.018540,000 stock1 µF 0603
0603CL10B105KA8NNNC
1u 0603 X7R ceramic capacitor
$0.010780,000 stock22 µF 0805 16V
0603CL21A226KOQNNNE
22u 0603 X7R ceramic capacitor
$0.040210,000 stock