The position of the material, is indicated on the print. (Refer to the wiring diagram.) ISD1760 (60sec), ISD1790 (90sn), ISD17120 (120 seconds) 1N 4007 7805 3 LEDs bulbs 1 Piece condenser microphone 3 pcs 3 pcs 1K 4.7K 82K... Electronics Projects, Digital Voice Recorder Circuit 60 120 Seconds "analog circuits projects, " Date 2019/08/03