My HC-SR04 has a 5V working voltage and 15mA, working current, but my LiPo only delivers 3.7V. I bought a DC Step-up with an input voltage of 0.5 to 5.5V and maximum input current of 1.2A.
Here’s my setup:
GND to GND, VIN to VCC, D2 to Echo and D5 to Trig. I want to use a DC Boost (Polulu U1V10F5) for this, but I’m not sure how the wiring goes (Looked at some explanations, tried out some stuff but at this point afraid to make a mistake and screw up my sensor). DC Boost has a Vin, Vout and GND pin.
My guess would be that 3V3 goes to VIN (DC), VOUT (DC) goes to VCC (HC-SR04) , but then what about the GND?