Instructions

KY-051 Voltage Translator / Level Shifter

Picture

Technical data / Short description

This level-shifter modulates the voltage of a digital signal into a higher or lower voltage. 4 channels are

available which can be modulated.

There are many microcontroller-systems which are operating in different voltage ranges: older systems, like

Arduino, are using 5V for their in/output pins and new systems, like Raspberry Pis, are using 3.3V. Back

then, microcontrollers were needing higher voltages to communicate. Nowadays since the most problems

with signal noise/ signal disruptions has been cleared, the voltage range is beeing kept as low as possible to

decrease the heat and decrease the energy consumption. Systems with 1.8V are not unusual these days.

But to communicate between two different systems, like in our example (Arduino ----> Raspberry Pi), you

have to shift the voltage range - if you don't, the systems with the lower voltage range will create more heat

and could take constant damage.

Pinout

The Pinout is printed on the module board.

The signal inputs/outputs A1-A4 also B1-B4 will be shifted to the needed voltage range (VCCa -> A1-A4 |

VCCb -> B1-B4)

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