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Pin Connections For Furnace or Electric Heat Electronic Circuit Schematic By Gary Novak Functions like a mechanical device
Here's the rest of the pin connections for the chips. Normally, you should have data sheets or data books which describe the chips. Op amp - LF441 or TL061:1 pin - balance, not connected 4 pin - minus 5 V 5 pin - balance, not connected 6 pin - output 7 pin - plus 5 V 8 pin - not connected The Darlington, MPSA13 looks like a normal transistor. left = emitter center = base right = collector when looking at flat surface in front. There are four connections to the Darlington collector - two diodes, and LED and a relay. There are six Schmidt triggers on a single chip, 40106 or 74C14: 1 pin in - 2 pin out 3 pin in - 4 pin out 5 pin in - 6 pin out 7 pin ground 9 pin in - 8 pin out 11 pin in - 10 pin out 13 pin in - 12 pin out 14 pin plus voltage 4020: 1 = output, ignore 2 = output, ignore 4 = output, ignore 5 = output, ignore 6 = output, ignore 7 = output, ignore 8 - ground 9 = output, ignore 12 = output, ignore 13 = output, ignore 14 = output, ignore 15 = output, ignore 16 - plus V 4017: 1 pin = output position 5 2 pin = output position 1 3 pin = output position 0 4 pin = output position 2 5 pin = output position 6 6 pin = output position 7 7 pin = output position 3 8 pin - ground 9 pin = output position 8 10 pin = output position 4 11 pin = output position 9 12 pin = carry out, ignore 16 pin = plus V 4013: 2 = output, ignore 3 = unused input, stabilized at + or ground 5 = unused input, stabilized at + or ground 7 - ground 8 = unused input, stabilized at + or ground 9 = unused input, stabilized at + or ground 10 = unused input, stabilized at + or ground 11 = unused input, stabilized at + or ground 12 = output, ignore 13 = output, ignore 14 - plus V OR gate - 4071: 1,2 in - 3 out 5,6 in - 4 out 8,9 in - 10 out 12,13 in - 11 out 7 - ground 14 - plus V stabilize any unused inputs at either plus V or ground.
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