25VDC Heart Beat Detector

This is a simple Hardware watch dog timer circuit that holds a relay on as long as it receives a 24V Rising edge every 250 ms. Used for industrial automation Interlock circuits to verify that a PLC is running. PCBWay Instant Quote tool allowed for uploading KiCad Gerber package and worked flawlessly. Pricing is un beatable even with the high cost of shipping overseas. Boards delivered on time and in excelent condition.

Sep 25,2025
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PCB
HDI PCB
Assembly
FPC/
Rigid-Flex
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2 Layers
1.6mm
CNC
Machining
Sheet Metal
3D Printing
Injection
Molding
Aluminum
Aluminum
Resin
ABS
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    After assembled I shall edit the sketch of operation and displaying.
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