That operates at 12 volts . I have been looking everywhere for these and ive noticed they are not easy to find. Please help . I HAVE BEEN WORKING ON DESIGNING A LIGHT AND DARK SENSOR which when darkness falls , a relay operating at 12v will turn on an analogue 555 timer circuit . This timer will then trigger a lamp after 5 seconds. Ultimately, the pulses from the op amp will also feed into two chips a 4511 and 4510 bcd . These chips will then be connected to the common cathode 7 segment display . If anyone can assist in linking me up .