SN74121N Monostable Multivibrator UART To TTL Converter This Dual Side LQF SMD

This Dual Side LQF SMD package to DIP Package Adapter will help you out in this case

Since CH340G driver IC is available onboard

You can also consider 5W-8Ohm Speaker

Transient-Protected Outputs

The Sensitivity of Digital pin can be varied using the potentiometer

SN74121N Monostable Multivibrator UART To TTL Converter This Dual Side LQF SMDThe SN74121N is a monostable Multi vibrator with Schmitt trigger inputs features dual negative transition triggered inputs and a single positive transition triggered input which can be used as an inhibit input. Complementary output pulses are provided. Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. Schmitt trigger input circuitry (TTL hysteresis) for the B input allow jitter