| Part | Value | Device | Package | Description | |
| C1 | 0.1 uF | C-USC0805 | C0805 | CAPACITOR, American symbol | |
| C2 | 0.1 uF | C-USC0805 | C0805 | CAPACITOR, American symbol | |
| C3 | 1 uF | C-USC0805 | C0805 | CAPACITOR, American symbol | |
| CN1 | JST-PH | JST_2PIN-SMT-RA | JST-PH-2-SMT-RA | JST 2-Pin Connectors of various flavors | |
| DISP1 | hp | 7-SEGMENT-4DIGIT-COUNTER-HP-BUBBLE | DIL12 | | |
| JP1 | ICSP | AVR_SPI_PRG_62X3_LOCK | 2X3_LOCK | AVR ISP 6 Pin | |
| LOGO1 | OSHW-LOGOM-COPPER | OSHW-LOGOM-COPPER | OSHW-LOGO-M_COPPER | Open Source Hardware Logo | |
| R1 | 10k | R-US_R0805 | R0805 | RESISTOR, American symbol | |
| R2 | 10k | R-US_R0805 | R0805 | RESISTOR, American symbol | |
| R3 | 220R | R-US_R0805 | R0805 | RESISTOR, American symbol | |
| R4 | 220R | R-US_R0805 | R0805 | RESISTOR, American symbol | |
| R5 | 220R | R-US_R0805 | R0805 | RESISTOR, American symbol | |
| R6 | 220R | R-US_R0805 | R0805 | RESISTOR, American symbol | |
| RTC1 | DS3231M | DS3231M | SOIC8 | DS3231M Real Time Clock. Accuracy +/-5ppm. Battery Backup. 2.3V to 5.5V. | |
| S1 | SKQGAFE010 | SWITCH-MOMENTARY-2SMD | TACTILE-SWITCH-SMD | Various NO switches- pushbuttons, reed, etc | |
| S2 | SKQGAFE010 | SWITCH-MOMENTARY-2SMD | TACTILE-SWITCH-SMD | Various NO switches- pushbuttons, reed, etc | |
| S3 | SKQGAFE010 | SWITCH-MOMENTARY-2SMD | TACTILE-SWITCH-SMD | Various NO switches- pushbuttons, reed, etc | |
| S4 | SS SMD402 | SWITCH-SPDTSMD2 | SWITCH-SPDT-SMD | SPDT Switch | |
| U1 | ATMEGA328P-AU | ATMEGA328P-AU | QFP80P900X900X120-32N | 8-bit Microcontroller with In-System Programmable Flash | |