14 Stage Ripple Carry Binary Counter IC - CD4020 Nvidia Microcontrollers This aluminum bullet propeller is

This aluminum bullet propeller is best-suitable for brushless motors and speed controllers

2 Channel 5V Relay Module with Optocoupler

Signals valid coins using digital pulses for microcontroller connection

Output terminal for relay contacts

7V and for ‘1’ (HIGH) state is min 2V

14 Stage Ripple Carry Binary Counter IC - CD4020 Nvidia Microcontrollers This aluminum bullet propeller is14 Stage Ripple Carry Binary Counter IC CD4020 The CD4020 IC is a ripple carry binary counter. All counter stages are master slave flip flops. The state of a counter advances one count on the negative transition of each input pulse; a high level on the RESET line resets the counter to its all zeros state. Schmitt's trigger action on the input pulse line permits unlimited rise and fall times. All inputs and outputs are buffered. The CD4x Series CD4020