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Housed in a miniature and reflowable package
2 lithium battery
Grove is a great invention by Seeed
the L293D chip is also known as a type of H-Bridge
Charging Voltage: 8
STM32F407VGT6 ARM Cortex-M4 32bit MCU heartbeat sensor Housed in a miniature andThe STM32F405xx and STM32F407xx family is based on the high performance ARMCortex M4 32 bit RISC core operating at a frequency of up to 168 MHz. The Cortex M4 core features a Floating point unit (FPU) single precision which supports all ARM single precision data processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security. The STM32F405xx and
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