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4040 Datasheet
NC (Normally Closed) → Open when pressed
2 V and 3000 mAh capacity
important events
battery charging experiments
INMP441 MEMS Microphone - I2S MD20A 4040 DatasheetAn omnidirectional MEMS microphone based on the INMP441 chip. Specifications: Supply voltage: 1. 8 3. 3V DC Signal voltage: 1. 8 3. 3V Average current: ~1. 4mA Chip: INMP441 Frequency range: 60 15,000Hz Sensitivity: ~ 26dBFS Communication: I2S PCB dimensions: 14 x 14mm Pinout: SD: I2S data signal VDD: Supply voltage GND: Ground min L R: Left Right channel selection (low = left channel, high = right channel) WS: I2S word select SCK: I2S clock signal