USB Host Shield (164) HCSR04 Can use as a 4-digit

Can use as a 4-digit display unit

Response Speed Fast response

7V Li-ion / Li-Po 3

this is a 5V relay module and uses jd-vcc for the relay power and is compliant with international safety standards

USB Host Shield (164) HCSR04 Can use as a 4-digitUNO USB Host Shield for Arduino The UNO USB Host Shield compatible with Arduino is based on the MAX3421E, which is a USB peripheral host controller containing the digital logic and analog circuitry necessary to implement a full speed USB peripheral or a full low speed host compliant to USB specification rev 2. 0. For a successful communication to happen using USB host shield protocol, you need at least one of the device to be the host, which means