40khz

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This is ultrasonic pest repellent device for bugs based on ATTINY85, resistors and PAM4803 amplifier with set of 40kHz ultrasonic transducers

attiny ultrasonic attiny85 avr-gcc ultrasound transducer pest dac attiny13 resistor-ladder avrgcc pest-repeller pest-repellent 40khz

Python WWVB / JJY low-frequency time-code transmitter for Raspberry Pi (3, 4, Zero, Zero 2 W, Pico). Manual, system-clock, or GPS time sources.

raspberry-pi micropython gps wwvb jjy radio-clock atomic-clock raspberry-pi-pico 40khz 60khz

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