slf_eater_digital_clock
sfines
My Build of Ben Eater's Digital Clock Kit
Components (23)
| Reference | Value | Description |
|---|---|---|
| U1 | LM7805_TO220 | Positive 1A 35V Linear Regulator, Fixed Output 5V, TO-220 |
| U2,U18 | LM339 | Quad Differential Comparators, SOIC-14/TSSOP-14 |
| U3,U5,U11 | 74LS90 | BCD Counter ( div 2 & div 5 ) |
| U4,U8,U12 | 74LS92 | Divide by 12 counter |
| U6,U9,U13,U14 | CD4511BE | CMOS BCD-to-7-Segment LED Latch Decoder Drivers |
| U17 | 74LS86 | Quad 2-input XOR |
| C1,C3 | 0.1 mf | Unpolarized capacitor |
| C2 | 10mf | Polarized capacitor |
| C4,C5 | 100nf | Unpolarized capacitor |
| C6 | 1nf | Unpolarized capacitor |
| C7,C8 | .1mf | Unpolarized capacitor |
| D1 | DB105-BP | Bridge Rectifier, 700V Vrms, 1.5A If, SMDIP-4 |
| D2 | 1N914 | 100V 0.3A Small Signal Fast Switching Diode, DO-35 |
| D3 | LED | Light emitting diode |
| R1,R2,R4-R6,R11-R14,R17,R18,R22,R23 | 47k | Resistor |
| R3,R7,R10,R20,R25 | 100k | Resistor |
| R8,R9 | 4k7 | Resistor |
| R15,R16 | 220 | Resistor |
| R19,R24 | 47K | Resistor |
| R21,R26 | 1k | Resistor |
| SW1 | RESET | Single Pole Single Throw (SPST) switch |
| SW2 | MINUTES | Single Pole Single Throw (SPST) switch |
| SW3 | HOURS | Single Pole Single Throw (SPST) switch |