; Output from TinyCAD version 1.25 TITLE 'Light Box Control Circuit' AUTHOR 'James Cameron' ORGANISATION 'Technical Aid for the Disabled' FILENAME 'C:\WINDOWS\Desktop\Technical Aid for the Disabled\ax2-design.dsn' REVISION 'AX2' DOCUMENT 'LBCC' DATE '15 March 1998' SHEET '1 of 1' UNITS 'mm' LAYER 'Default Layer' OBJECT 'Rectangle' , POSITION 56.0,104.0mm TO 76.0,124.0mm OBJECT 'Rectangle' , POSITION 122.0,88.0mm TO 146.0,118.0mm OBJECT 'Ellipse' , POSITION 34.0,120.0mm TO 32.0,120.0mm OBJECT 'Line' , POSITION 26.0,158.0mm TO 20.0,124.0mm OBJECT 'Line' , POSITION 26.0,158.0mm TO 22.0,154.0mm OBJECT 'Text' , POSITION 214.0,114.0mm , DIRECTION 3 , VALUE '3' OBJECT 'Text' , POSITION 148.0,110.0mm , DIRECTION 3 , VALUE '7' OBJECT 'Text' , POSITION 148.0,104.0mm , DIRECTION 3 , VALUE '4' OBJECT 'Text' , POSITION 148.0,92.0mm , DIRECTION 3 , VALUE '3' OBJECT 'Text' , POSITION 148.0,98.0mm , DIRECTION 3 , VALUE '2' OBJECT 'Text' , POSITION 62.0,116.0mm , DIRECTION 3 , VALUE 'LM555' OBJECT 'Text' , POSITION 54.0,120.0mm , DIRECTION 3 , VALUE '2' OBJECT 'Text' , POSITION 54.0,114.0mm , DIRECTION 3 , VALUE '6' OBJECT 'Text' , POSITION 54.0,108.0mm , DIRECTION 3 , VALUE '7' OBJECT 'Text' , POSITION 64.0,128.0mm , DIRECTION 3 , VALUE '1' OBJECT 'Text' , POSITION 58.0,104.0mm , DIRECTION 3 , VALUE '4' OBJECT 'Text' , POSITION 64.0,104.0mm , DIRECTION 3 , VALUE '8' OBJECT 'Text' , POSITION 70.0,104.0mm , DIRECTION 3 , VALUE '3' OBJECT 'Text' , POSITION 130.0,98.0mm , DIRECTION 3 , VALUE '' OBJECT 'Text' , POSITION 130.0,104.0mm , DIRECTION 3 , VALUE 'Decade' OBJECT 'Text' , POSITION 130.0,108.0mm , DIRECTION 3 , VALUE 'Counter' OBJECT 'Text' , POSITION 130.0,88.0mm , DIRECTION 3 , VALUE '16' OBJECT 'Text' , POSITION 118.0,98.0mm , DIRECTION 3 , VALUE '14' OBJECT 'Text' , POSITION 118.0,110.0mm , DIRECTION 3 , VALUE '15' OBJECT 'Text' , POSITION 124.0,122.0mm , DIRECTION 3 , VALUE '13' OBJECT 'Text' , POSITION 132.0,122.0mm , DIRECTION 3 , VALUE '8' OBJECT 'Text' , POSITION 142.0,94.0mm , DIRECTION 3 , VALUE 'Q0' OBJECT 'Text' , POSITION 142.0,100.0mm , DIRECTION 3 , VALUE 'Q1' OBJECT 'Text' , POSITION 142.0,106.0mm , DIRECTION 3 , VALUE 'Q2' OBJECT 'Text' , POSITION 142.0,112.0mm , DIRECTION 3 , VALUE 'Q3' OBJECT 'Text' , POSITION 126.0,118.0mm , DIRECTION 3 , VALUE '`C`E' OBJECT 'Text' , POSITION 122.0,112.0mm , DIRECTION 3 , VALUE 'RS' OBJECT 'Text' , POSITION 122.0,100.0mm , DIRECTION 3 , VALUE 'CK' OBJECT 'Text' , POSITION 134.0,118.0mm , DIRECTION 3 , VALUE 'GND' OBJECT 'Text' , POSITION 70.0,108.0mm , DIRECTION 3 , VALUE 'OUT' OBJECT 'Text' , POSITION 64.0,108.0mm , DIRECTION 3 , VALUE 'VCC' OBJECT 'Text' , POSITION 58.0,108.0mm , DIRECTION 3 , VALUE 'RS' OBJECT 'Text' , POSITION 64.0,124.0mm , DIRECTION 3 , VALUE 'GND' OBJECT 'Text' , POSITION 56.0,122.0mm , DIRECTION 3 , VALUE 'TR' OBJECT 'Text' , POSITION 130.0,100.0mm , DIRECTION 3 , VALUE '4017' OBJECT 'Text' , POSITION 132.0,92.0mm , DIRECTION 3 , VALUE 'VCC' OBJECT 'Text' , POSITION 28.0,160.0mm , DIRECTION 3 , VALUE 'Connect trigger switch here' OBJECT 'Text' , POSITION 208.0,120.0mm , DIRECTION 3 , VALUE '2' OBJECT 'Text' , POSITION 216.0,90.0mm , DIRECTION 3 , VALUE '2' OBJECT 'Text' , POSITION 204.0,104.0mm , DIRECTION 3 , VALUE '1' OBJECT 'Text' , POSITION 194.0,130.0mm , DIRECTION 3 , VALUE '1' OBJECT 'Text' , POSITION 204.0,140.0mm , DIRECTION 3 , VALUE '3' OBJECT 'Text' , POSITION 170.0,158.0mm , DIRECTION 3 , VALUE '1) surge on q1/q2 may re-trigger LM555' OBJECT 'Text' , POSITION 170.0,162.0mm , DIRECTION 3 , VALUE '2) flourescents trigger best at 13.6V, hardly at 12V' OBJECT 'Text' , POSITION 170.0,166.0mm , DIRECTION 3 , VALUE '3) may add blue LED on LM555 output' OBJECT 'Symbol' , POSITION 52.0,152.0mm , DIRECTION 1 , TYPE 'C', NAME '0.1uF', REF 'C1', PART 0, ATTRIBUTE 'Debounce time constant' OBJECT 'Symbol' , POSITION 92.0,90.0mm , DIRECTION 1 , TYPE 'CAP1', NAME '10uF', REF 'C2', PART 0 OBJECT 'Symbol' , POSITION 176.0,132.0mm , DIRECTION 1 , TYPE 'LED', NAME 'LED', REF 'D2', PART 0, OTHER 'Yellow' OBJECT 'Symbol' , POSITION 188.0,132.0mm , DIRECTION 1 , TYPE 'LED', NAME 'LED', REF 'D3', PART 0, OTHER 'Red' OBJECT 'Symbol' , POSITION 164.0,132.0mm , DIRECTION 1 , TYPE 'LED', NAME 'LED', REF 'D1', PART 0, OTHER 'Green' OBJECT 'Symbol' , POSITION 116.0,114.0mm , DIRECTION 3 , TYPE 'D', NAME 'IN4148', REF 'D5', PART 0, ATTRIBUTE 'Cycle reset diode OR gate' OBJECT 'Symbol' , POSITION 92.0,150.0mm , DIRECTION 0 , TYPE 'D', NAME 'IN4148', REF 'D4', PART 0, ATTRIBUTE 'Power-on reset charge dump' OBJECT 'Symbol' , POSITION 116.0,124.0mm , DIRECTION 3 , TYPE 'D', NAME 'IN4148', REF 'D6', PART 0, ATTRIBUTE 'Cycle reset diode OR gate' OBJECT 'Symbol' , POSITION 40.0,144.0mm , DIRECTION 7 , TYPE 'PNP', NAME 'BC558', REF 'Q3', PART 0, OTHER 'PNP' OBJECT 'Symbol' , POSITION 208.0,136.0mm , DIRECTION 3 , TYPE 'PMOS', NAME 'MTP3055E', REF 'Q2', PART 0, OTHER '12A 60V MOSFET' OBJECT 'Symbol' , POSITION 218.0,110.0mm , DIRECTION 3 , TYPE 'PMOS', NAME 'MTP3055E', REF 'Q1', PART 0, OTHER '12A 60V MOSFET' OBJECT 'Symbol' , POSITION 42.0,96.0mm , DIRECTION 1 , TYPE 'R', NAME '1k', REF 'R1', PART 0, ATTRIBUTE 'Trigger noise reduction' OBJECT 'Symbol' , POSITION 50.0,96.0mm , DIRECTION 0 , TYPE 'R', NAME '100k', REF 'R2', PART 0, ATTRIBUTE 'Debounce time constant' OBJECT 'Symbol' , POSITION 78.0,152.0mm , DIRECTION 0 , TYPE 'R', NAME '1M', REF 'R3', PART 0, ATTRIBUTE 'Power-on reset time constant' OBJECT 'Symbol' , POSITION 120.0,152.0mm , DIRECTION 0 , TYPE 'R', NAME '10k', REF 'R4', PART 0, ATTRIBUTE 'Cycle reset pulldown' OBJECT 'Symbol' , POSITION 160.0,152.0mm , DIRECTION 0 , TYPE 'R', NAME '1k', REF 'R5', PART 0 OBJECT 'Symbol' , POSITION 172.0,152.0mm , DIRECTION 0 , TYPE 'R', NAME '1k', REF 'R6', PART 0 OBJECT 'Symbol' , POSITION 184.0,152.0mm , DIRECTION 0 , TYPE 'R', NAME '1k', REF 'R7', PART 0 OBJECT 'Label' , POSITION 220.0,124.0mm , DIRECTION 3 , VALUE 'Output' OBJECT 'Label' , POSITION 220.0,98.0mm , DIRECTION 3 , VALUE 'Output' OBJECT 'Label' , POSITION 220.0,94.0mm , DIRECTION 3 , VALUE 'Left' OBJECT 'Label' , POSITION 88.0,110.0mm , DIRECTION 3 , VALUE 'Power-on reset' OBJECT 'Label' , POSITION 136.0,130.0mm , DIRECTION 3 , VALUE 'Cycle reset' OBJECT 'Label' , POSITION 162.0,104.0mm , DIRECTION 3 , VALUE 'Right' OBJECT 'Label' , POSITION 162.0,98.0mm , DIRECTION 3 , VALUE 'Left' OBJECT 'Label' , POSITION 162.0,92.0mm , DIRECTION 3 , VALUE 'Idle' OBJECT 'Label' , POSITION 96.0,98.0mm , DIRECTION 3 , VALUE 'Debounced Input' OBJECT 'Label' , POSITION 220.0,120.0mm , DIRECTION 3 , VALUE 'Right' OBJECT 'Label' , POSITION 22.0,124.0mm , DIRECTION 3 , VALUE 'Input' OBJECT 'Power' , POSITION 224.0,76.0mm , STYLE 1 , DIRECTION 3 , VALUE '13.8V' OBJECT 'Power' , POSITION 224.0,152.0mm , STYLE 1 , DIRECTION 3 , VALUE 'GND' OBJECT 'Power' , POSITION 224.0,90.0mm , STYLE 1 , DIRECTION 3 , VALUE '' OBJECT 'Power' , POSITION 224.0,116.0mm , STYLE 1 , DIRECTION 3 , VALUE '' OBJECT 'Power' , POSITION 24.0,152.0mm , STYLE 1 , DIRECTION 2 , VALUE '' OBJECT 'Power' , POSITION 24.0,120.0mm , STYLE 1 , DIRECTION 2 , VALUE '' OBJECT 'Wire' , POSITION 40.0,96.0mm TO 40.0,120.0mm OBJECT 'Wire' , POSITION 48.0,96.0mm TO 48.0,138.0mm OBJECT 'Wire' , POSITION 60.0,104.0mm TO 60.0,98.0mm OBJECT 'Wire' , POSITION 60.0,98.0mm TO 66.0,98.0mm OBJECT 'Wire' , POSITION 66.0,104.0mm TO 66.0,76.0mm OBJECT 'Wire' , POSITION 66.0,124.0mm TO 66.0,152.0mm OBJECT 'Wire' , POSITION 56.0,108.0mm TO 48.0,108.0mm OBJECT 'Wire' , POSITION 56.0,114.0mm TO 48.0,114.0mm OBJECT 'Wire' , POSITION 40.0,120.0mm TO 56.0,120.0mm OBJECT 'Wire' , POSITION 40.0,120.0mm TO 34.0,120.0mm OBJECT 'Wire' , POSITION 134.0,88.0mm TO 134.0,76.0mm OBJECT 'Wire' , POSITION 136.0,124.0mm TO 136.0,118.0mm OBJECT 'Wire' , POSITION 128.0,124.0mm TO 136.0,124.0mm OBJECT 'Wire' , POSITION 128.0,118.0mm TO 128.0,152.0mm OBJECT 'Wire' , POSITION 150.0,110.0mm TO 146.0,110.0mm OBJECT 'Wire' , POSITION 150.0,130.0mm TO 150.0,110.0mm OBJECT 'Wire' , POSITION 94.0,130.0mm TO 150.0,130.0mm OBJECT 'Wire' , POSITION 94.0,120.0mm TO 94.0,130.0mm OBJECT 'Wire' , POSITION 100.0,120.0mm TO 94.0,120.0mm OBJECT 'Wire' , POSITION 118.0,120.0mm TO 118.0,132.0mm OBJECT 'Wire' , POSITION 116.0,110.0mm TO 122.0,110.0mm OBJECT 'Wire' , POSITION 118.0,120.0mm TO 118.0,110.0mm OBJECT 'Wire' , POSITION 116.0,120.0mm TO 118.0,120.0mm OBJECT 'Wire' , POSITION 76.0,130.0mm TO 88.0,130.0mm OBJECT 'Wire' , POSITION 76.0,132.0mm TO 76.0,130.0mm OBJECT 'Wire' , POSITION 100.0,110.0mm TO 88.0,110.0mm OBJECT 'Wire' , POSITION 88.0,90.0mm TO 88.0,134.0mm OBJECT 'Wire' , POSITION 88.0,150.0mm TO 88.0,152.0mm OBJECT 'Wire' , POSITION 72.0,104.0mm TO 72.0,98.0mm OBJECT 'Wire' , POSITION 72.0,98.0mm TO 122.0,98.0mm OBJECT 'Wire' , POSITION 122.0,98.0mm TO 122.0,98.0mm OBJECT 'Wire' , POSITION 216.0,110.0mm TO 216.0,152.0mm OBJECT 'Wire' , POSITION 206.0,136.0mm TO 206.0,152.0mm OBJECT 'Wire' , POSITION 206.0,116.0mm TO 224.0,116.0mm OBJECT 'Wire' , POSITION 216.0,90.0mm TO 224.0,90.0mm OBJECT 'Wire' , POSITION 192.0,104.0mm TO 192.0,130.0mm OBJECT 'Wire' , POSITION 192.0,130.0mm TO 196.0,130.0mm OBJECT 'Wire' , POSITION 206.0,104.0mm TO 202.0,104.0mm OBJECT 'Wire' , POSITION 202.0,104.0mm TO 202.0,98.0mm OBJECT 'Wire' , POSITION 40.0,76.0mm TO 224.0,76.0mm OBJECT 'Wire' , POSITION 224.0,152.0mm TO 34.0,152.0mm OBJECT 'Wire' , POSITION 40.0,144.0mm TO 40.0,152.0mm OBJECT 'Wire' , POSITION 40.0,136.0mm TO 40.0,128.0mm OBJECT 'Wire' , POSITION 40.0,128.0mm TO 48.0,128.0mm OBJECT 'Wire' , POSITION 32.0,140.0mm TO 30.0,140.0mm OBJECT 'Wire' , POSITION 30.0,140.0mm TO 30.0,120.0mm OBJECT 'Wire' , POSITION 30.0,120.0mm TO 24.0,120.0mm OBJECT 'Wire' , POSITION 34.0,120.0mm TO 30.0,120.0mm OBJECT 'Wire' , POSITION 34.0,152.0mm TO 24.0,152.0mm OBJECT 'Wire' , POSITION 146.0,92.0mm TO 158.0,92.0mm OBJECT 'Wire' , POSITION 158.0,92.0mm TO 158.0,116.0mm OBJECT 'Wire' , POSITION 146.0,98.0mm TO 202.0,98.0mm OBJECT 'Wire' , POSITION 146.0,104.0mm TO 192.0,104.0mm OBJECT 'Wire' , POSITION 170.0,98.0mm TO 170.0,116.0mm OBJECT 'Wire' , POSITION 182.0,104.0mm TO 182.0,116.0mm OBJECT 'Junction' , POSITION 158.0,152.0mm OBJECT 'Junction' , POSITION 134.0,76.0mm OBJECT 'Junction' , POSITION 88.0,76.0mm OBJECT 'Junction' , POSITION 66.0,76.0mm OBJECT 'Junction' , POSITION 48.0,76.0mm OBJECT 'Junction' , POSITION 48.0,152.0mm OBJECT 'Junction' , POSITION 66.0,152.0mm OBJECT 'Junction' , POSITION 88.0,152.0mm OBJECT 'Junction' , POSITION 118.0,152.0mm OBJECT 'Junction' , POSITION 128.0,152.0mm OBJECT 'Junction' , POSITION 182.0,152.0mm OBJECT 'Junction' , POSITION 170.0,152.0mm OBJECT 'Junction' , POSITION 76.0,152.0mm OBJECT 'Junction' , POSITION 40.0,120.0mm OBJECT 'Junction' , POSITION 48.0,114.0mm OBJECT 'Junction' , POSITION 48.0,108.0mm OBJECT 'Junction' , POSITION 66.0,98.0mm OBJECT 'Junction' , POSITION 88.0,110.0mm OBJECT 'Junction' , POSITION 118.0,110.0mm OBJECT 'Junction' , POSITION 118.0,120.0mm OBJECT 'Junction' , POSITION 128.0,124.0mm OBJECT 'Junction' , POSITION 88.0,130.0mm OBJECT 'Junction' , POSITION 206.0,152.0mm OBJECT 'Junction' , POSITION 216.0,152.0mm OBJECT 'Junction' , POSITION 30.0,120.0mm OBJECT 'Junction' , POSITION 48.0,128.0mm OBJECT 'Junction' , POSITION 40.0,152.0mm OBJECT 'Junction' , POSITION 170.0,98.0mm OBJECT 'Junction' , POSITION 182.0,104.0mm