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STD Watchdog Timer Circuit
Watchdog Timer Circuit
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Update time：
2022-03-16 02:14:16
Creation time：
2022-03-16 01:57:12
Description
Description
Simple circuit for a tunable watchdog timer based on the 555 timer module and a 12-bit counter.
Design Drawing
Design Drawing
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | F-HDR | 5V-IN,GND,RESET-IN,SIG-OUT | HDR-M-2.54_1X1 | 4 |
| 2 | 2.2uF | C1 | CASE-A_3216 | 1 |
| 3 | 10K | PDR1,PDR2 | R0603 | 2 |
| 4 | 1K | R/R1 | R0603 | 1 |
| 5 | 100K | R/R2 | R0603 | 1 |
| 6 | DIP switchEI-04 | SW1 | SW-TH_DIPSWITCHEI-04 | 1 |
| 7 | NE555P | U1 | DIP-8_L9.8-W6.6-P2.54-LS7.6-BL | 1 |
| 8 | CD4040BE | U2 | DIP-16_16P-L20.2-W6.6-P2.54-LS7.6-BL | 1 |
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