[PROBLEMS] A small and low-cost fish memory capable of accurately storing the depth of fish that can be fished. When the water reaches the depth of the fish's habitat, it automatically alarms by voice and informs the angler of the location of the school of fish. Provide water depth electronic alarm. One end of a button 2 protrudes from a mounting hole 1a of a housing 1, the other end is connected to a first circuit board 3, a single chip microcomputer is connected to the first circuit board, After the button, the first circuit board and the microcomputer are fixed in the housing, the cover 5 is assembled, the battery 13 is fixed to the second circuit board 7, the sensor is connected to the second circuit board, the second The circuit board, the battery, and the sensor are mounted in the housing 6 and sealed by the cover 9, the data line 14 connects the second circuit board and the first circuit board, and the buzzer 12 is connected to the first circuit board or the first circuit board. It is connected to the second circuit board and assembled. [Selection] Figure 1【課題】小型かつ低コストで、魚の釣れる水深を精確にメモリすることができ、魚の生息領域の水深に到達すると自動的に音声でアラームし、釣り人に魚群の位置を知らせる釣り用リールのメモリ水深電子アラームを提供する。【解決手段】ボタン２は、一方の端部がハウジング１の取り付け穴１ａから突出し、他方の端部が第１の回路基板３に接続され、シングルチップマイコンが第１の回路基板に接続され、ボタン、第１の回路基板及びマイコンがハウジング内に固定された後に、カバー５を組み立て、バッテリ１３が第２の回路基板７に固定され、センサが第２の回路基板に接続され、第２の回路基板、バッテリ及びセンサはハウジング６内に取り付けられ、カバー９により密閉され、データ線１４が第２の回路基板と第１の回路基板とを接続し、ブザー１２が、第１の回路基板又は第２の回路基板に接続され、組み立てられる。【選択図】図１
