Abstract: The present invention introduces an alarm circuit that detects potentially dangerous objects in the proximity during human activities, such as walking or running. The circuit is designed mostly to prevent stumbling for the people with temporary or permanent visual impairment conditions but can be used to prevent physical accidents under other circumstances as well. The circuit of the present invention can be permanently or temporarily mounted on human shoes, clothes, or other wearing means, including body parts. The placement of the circuit of the present invention includes but is not limited to the previously mentioned ones.