
ATmega328 in DIP package with Arduino bootloader pre-loaded for custom standalone designs. Requires an external 16 MHz crystal, 5V supply, and a USB-serial adapter for programming.

| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| PC6/RESET | 1 | control | ||
| PD0/RXD | 2 | signal | ||
| PD1/TXD | 3 | signal | ||
| PD2/INT0 | 4 | signal | ||
| PD3/INT1/OC2B | 5 | signal | ||
| PD4/XCK/T0 | 6 | signal | ||
| VCC | 7 | power | ||
| GND | 8 | ground | ||
| PB6/XTAL1 | 9 | signal | ||
| PB7/XTAL2 | 10 | signal | ||
| PD5/T1/OC0B | 11 | signal | ||
| PD6/AIN0/OC0A | 12 | signal | ||
| PD7/AIN1 | 13 | signal | ||
| PB0/ICP1/CLKO | 14 | signal | ||
| PB1/OC1A | 15 | signal | ||
| PB2/SS/OC1B | 16 | signal | ||
| PB3/MOSI/OC2A | 17 | signal | ||
| PB4/MISO | 18 | signal | ||
| PB5/SCK | 19 | signal | ||
| AVCC | 20 | power | ||
| AREF | 21 | signal | ||
| GND | 22 | ground | ||
| PC0/ADC0 | 23 | signal | ||
| PC1/ADC1 | 24 | signal | ||
| PC2/ADC2 | 25 | signal | ||
| PC3/ADC3 | 26 | signal | ||
| PC4/ADC4/SDA | 27 | signal | ||
| PC5/ADC5/SCL | 28 | signal |
74HC logic gates, MCP3008/MCP23017 ADCs and expanders, 24LC256 EEPROM, 4N25-series optocouplers and ULN2803A drivers — bare DIP chips with no breakout-board conveniences like pull-ups or level shifting.
18-Channel 8-bit PWM LED Driver w/ I2C Interface visual preview18-Channel 8-bit PWM LED Driver w/ I2C Interface
24LC256 I/P I2C EEPROM PDIP-8 visual preview24LC256 I/P I2C EEPROM PDIP-8
24LC256 P DIP-8 visual preview24LC256 P DIP-8
4N25 DIP-6 visual preview4N25 DIP-6
4N26 DIP-6 visual preview4N26 DIP-6
4N27 DIP-6 visual preview4N27 DIP-6
4N28 DIP-6 visual preview4N28 DIP-6
555/556 Timer visual preview555/556 Timer
74HC138 3-to-8 Decoder DIP-16 visual preview74HC138 3-to-8 Decoder DIP-16
74HC153 Dual 4 Input Multiplexer SO-16 PDIP-16 visual preview74HC153 Dual 4 Input Multiplexer SO-16 PDIP-16
74HC157 Quad 2 Input Multiplexer SO-16 PDIP-16 visual preview74HC157 Quad 2 Input Multiplexer SO-16 PDIP-16
74HC165 Parallel-In Serial-Out Shift Register DIP-16 visual preview74HC165 Parallel-In Serial-Out Shift Register DIP-16
10W Super Bright LED - Violet visual preview
10W Super Bright LED - Warm White visual preview
3-Pin LED Strip Connector Cable - Single Head (5PCS) visual preview
3-Pin LED Strip Connector Cable (5PCS) visual previewWS2812/SK6812 NeoPixel strips, rings and Jewels, APA102 DotStar pixels, and plain analog RGB strips — each matched to its protocol and host, not just its connector.
Components · Addressable LEDs · 180 parts
10-bit ADC (SPI) visual preview
2-Channel RS232 Module for Raspberry Pi Pico visual preview
4-Ch USB 3.2 Gen1 Hub (USB3.2-Gen1-HUB-4U) visual preview
6-in-1 USB to Serial Converter visual previewADS1115/MCP3421 ADCs, MCP4725 and GP8413 DACs, CP2102 USB-UART boards, and I2C plumbing like the LTC4316 address shifter — matched to bus, resolution and signal range.
Components · Interface converters · 114 parts
256MB Micro SD Memory Card visual preview
25LC256 256 Kbit SPI EEPROM visual preview
64 Mbit Serial Pseudo SRAM - PSRAM - 3.3V 133 MHz visual preview
8GB Class 10 SD/MicroSD Memory Card - SD Adapter Included visual preview24LC32/25LC256 EEPROM, I2C FRAM, 64Mbit PSRAM, and microSD breakouts up to 64GB — matched to write frequency and data volume, not just interface.
Components · Memory & storage · 39 parts
1/4W Resistor Pack - 400 PCS visual preview
1N4001 Diode - 10 pack visual preview
1N4007 Diode visual preview
1N4148 General Purpose Fast Switching Diode visual previewE12 resistor kits, ceramic and electrolytic capacitor sets, 1N4148/1N4007 diodes, TIP120 Darlingtons, IRLZ44N MOSFETs and 100F supercapacitors — bench stock in kit quantities.
Components · Passives · 58 parts