LM3914N-1 by Texas Instruments(TI) Design and production,in Shenzhen Xinhuantong Technology Co., Ltd. Spot sales,And can pass Shenzhen Xinhuantong Technology Co., Ltd. Purchasing。LM3914N-1 Price reference $ 2.960000。LM3914N-1 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information LM3914N-1 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial