HCSR04 5V to 3.3V Converter

thingiverse

This little box allows to connect a HCSR04 distance sensor to GPIO pins of a Raspberry pi without soldering anything. As no soldering skills are required , this is ideal for classroom initiation... * Why do you need this adapter : - The Raspberry pi has .3V GPIO, and the HCSR04 input is 5V. - If you want to connect a HCSR04 sensor to a raspberry pi, you really need to add 2 résistors to divide the voltage. A 1K resistor and a 2K resistor. This adapter is a way to achieve this, without the need to solder anything. * What you will need - a female / Female dupont cable with 4 pins connectors. - 3 screws , ( Please check the photo of the reference for the screws) - 1 resistor 1K - 1 Resistor 2K - The STL parts, ( you will need 3* Block.stl ) * How to make it : - Prepare the résistors like in the first photo. - Use the box , screws and block to lock the resistors ( by screwing the little block on the wires) * How to connect it : - connect the dupont cable sensor side to the HCSR04. - connect the board side cables to the Raspberry pi. - Check my recommended SONAR allocation PI PINS. ( Check the 2 Powerpoint slides) I use this allocation with 4 pins female female dupont cables where i reorder the wires in the connectors to match each SLOT. * how to test it : you can find many python examples to test HCSR04 devices on github. This is part of a wider project that i am preparing since a year now, and which is getting closer to be released ! Follow me ! :-)