freqcount
d00p44
accurate frequency counter
Components (19)
| Reference | Value | Description |
|---|---|---|
| Q1 | MMBT3904 | |
| QA1 | Quarz_Abra | |
| U1-U4 | 74LS390 | |
| U5,U8,U12 | 74AHC1G04 | |
| U6,U9 | 74LV8154 | |
| U7,U10 | MCP23017_SS | |
| U11 | WeMos_D1_mini | |
| C1-C3 | 100nF | |
| D1-D4 | 1N4448 | |
| D5,D7 | BAT54S | |
| F1 | 500mA | |
| J1,J2 | Conn_01x03_Male | |
| J3,J6 | Conn_01x04_Male | |
| J4,J5 | Conn_Coaxial | |
| JP1 | Jumper_2_Open | |
| R1-R5,R7,R9-R11 | 10k | |
| R6 | 47R | |
| R8 | 1k | |
| SW1 | SW_DIP_x02 |