14 lines
720 B
Markdown
14 lines
720 B
Markdown
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tags:
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- resource
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created: 2026-07-08 17:24
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---
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## Summary
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Each board contains four identical circuits using BSS138 MOSFETs. The ground pins are not connected to the circuit in any way and are not needed for it to function. A low level output is sinked through the corresponding input signal (MCU GPIO pin). A high level output is sourced through the corresponding Vin pin (LV or HV) through a 10k resistor. If an input is left floating, the corresponding output will go high. If using unidirectionally you can put a strong pull down resistor (1k) on the input side. A pull down on the output side will cause malfunction.
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## References
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![[level_shifter_circuit_diagram.jpg.jpg]]
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![[level_shifter_board_pic.jpg]] |