L7912ACV by STMicroelectronics Design and production,in Hong Kong QX Electronics Limited Spot sales,And can pass Hong Kong QX Electronics Limited Purchasing。L7912ACV Price reference $ 0.620000。L7912ACV - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information L7912ACV Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial