semiconductors and tubes

schematic symbol: semiconductors and tubes - diode bridge round

schematic symbol: semiconductors and tubes - diode bridge, + left

schematic symbol: semiconductors and tubes - diode bridge, + right

schematic symbol: semiconductors and tubes - varactor

schematic symbol: semiconductors and tubes - diac

schematic symbol: semiconductors and tubes - transil unidirectional

schematic symbol: semiconductors and tubes - transil bidirectional

schematic symbol: semiconductors and tubes - triac

schematic symbol: semiconductors and tubes - trisil

schematic symbol: semiconductors and tubes - thyristor

schematic symbol: semiconductors and tubes - varistor