Integrated Circuits¶
555 LED Blinker Circuit¶
Using the schemdraw.elements.intcircuits.Ic class to define a custom integrated circuit.
d = schemdraw.Drawing(fontsize=12)
IC555def = elm.Ic(pins=[elm.IcPin(name='TRG', side='left', pin='2'),
elm.IcPin(name='THR', side='left', pin='6'),
elm.IcPin(name='DIS', side='left', pin='7'),
elm.IcPin(name='CTL', side='right', pin='5'),
elm.IcPin(name='OUT', side='right', pin='3'),
elm.IcPin(name='RST', side='top', pin='4'),
elm.IcPin(name='Vcc', side='top', pin='8'),
elm.IcPin(name='GND', side='bot', pin='1'),],
edgepadW=.5,
edgepadH=1,
pinspacing=1.5,
leadlen=1,
label='555')
d += (T := IC555def)
d += (BOT := elm.Ground(xy=T.GND))
d += elm.Dot()
d += elm.Resistor().endpoints(T.DIS, T.THR).label('Rb')
d += elm.Resistor().up().at(T.DIS).label('Ra').label('+Vcc', 'right')
d += elm.Line().endpoints(T.THR, T.TRG)
d += elm.Capacitor().down().at(T.TRG).toy(BOT.start).label('C')
d += elm.Line().right().tox(BOT.start)
d += elm.Capacitor().down().at(T.CTL).toy(BOT.start).label('.01$\mu$F', 'bottom')
d += elm.Dot().at(T.DIS)
d += elm.Dot().at(T.THR)
d += elm.Dot().at(T.TRG)
d += elm.Line().endpoints(T.RST,T.Vcc)
d += elm.Dot()
d += elm.Line().up().length(d.unit/4).label('+Vcc', 'right')
d += elm.Resistor().right().at(T.OUT).label('330')
d += elm.LED().down().flip().toy(BOT.start)
d += elm.Line().left().tox(BOT.start)
d.draw()
Seven-Segment Display Counter¶
d = schemdraw.Drawing(fontsize=12)
d += (IC555 := elm.Ic555())
d += (gnd := elm.Ground(xy=IC555.GND))
d += elm.Dot()
d += elm.Resistor().endpoints(IC555.DIS, IC555.THR).label('100 kΩ')
d += elm.Resistor().up().at(IC555.DIS).label('1 kΩ').label('+Vcc', 'right')
d += elm.Line().endpoints(IC555.THR, IC555.TRG)
d += elm.Capacitor(polar=True).down().at(IC555.TRG).toy(gnd.start).label('10 μF')
d += elm.Line().right().tox(gnd.start)
d += elm.Capacitor().down().at(IC555.CTL).toy(gnd.start).label('.01 μF', 'bottom')
d += elm.Line().left().tox(gnd.start)
d += elm.Dot().at(IC555.DIS)
d += elm.Dot().at(IC555.THR)
d += elm.Dot().at(IC555.TRG)
d += elm.Line().endpoints(IC555.RST,IC555.Vcc)
d += elm.Dot()
d += elm.Line().up().length(d.unit/4).label('+Vcc', 'right')
IC4026 = elm.Ic(pins=[elm.IcPin('CLK', pin='1', side='left'),
elm.IcPin('INH', pin='2', side='left'), # Inhibit
elm.IcPin('RST', pin='15', side='left'),
elm.IcPin('DEI', pin='3', side='left'), # Display Enable In
elm.IcPin('Vss', pin='8', side='bot'),
elm.IcPin('Vdd', pin='16', side='top'),
elm.IcPin('UCS', pin='14', side='bot'), # Ungated C Segment
elm.IcPin('DEO', pin='4', side='bot'), # Display Enable Out
elm.IcPin('Co', pin='4', side='bot'), # Carry out
elm.IcPin('g', pin='7', side='right'),
elm.IcPin('f', pin='6', side='right'),
elm.IcPin('e', pin='11', side='right'),
elm.IcPin('d', pin='9', side='right'),
elm.IcPin('c', pin='13', side='right'),
elm.IcPin('b', pin='12', side='right'),
elm.IcPin('a', pin='10', side='right'),
],
w=4, leadlen=.8).label('4026').right()
d += IC4026.at((IC555.OUT[0]+5, IC555.center[1])).anchor('center')
d += elm.Line().at(IC555.OUT).right().length(d.unit/3)
d += elm.Line().down().toy(IC4026.CLK)
d += elm.Line().right().tox(IC4026.CLK)
d += elm.LineDot().endpoints(IC4026.INH, IC4026.RST)
d += elm.Line().left().length(d.unit/4)
d += elm.Ground()
d += elm.Line().at(IC4026.DEI).up().toy(IC4026.Vdd)
d += elm.LineDot().right().tox(IC4026.Vdd)
d += elm.Line().up().length(d.unit/4).label('+Vcc', 'right')
d += elm.LineDot().right().at(IC4026.Vss).tox(IC4026.UCS)
d += elm.Ground()
d += elm.LineDot().tox(IC4026.DEO)
d += elm.Line().tox(IC4026.Co)
d += elm.Resistor().right().at(IC4026.a)
d += (disp := elm.SevenSegment(cathode=True).anchor('a'))
d += elm.Resistor().at(IC4026.b)
d += elm.Resistor().at(IC4026.c)
d += elm.Resistor().at(IC4026.d)
d += elm.Resistor().at(IC4026.e)
d += elm.Resistor().at(IC4026.f)
d += elm.Resistor().at(IC4026.g).label('7 x 330', loc='bottom')
d += elm.Ground().at(disp.cathode)
d.draw()
Arduino Board¶
The Arduino board uses schemdraw.elements.connectors.OrthoLines to easily add all connections between data bus and headers.
class Atmega328(elm.Ic):
def __init__(self, *args, **kwargs):
pins=[elm.IcPin(name='PD0', pin='2', side='r', slot='1/22'),
elm.IcPin(name='PD1', pin='3', side='r', slot='2/22'),
elm.IcPin(name='PD2', pin='4', side='r', slot='3/22'),
elm.IcPin(name='PD3', pin='5', side='r', slot='4/22'),
elm.IcPin(name='PD4', pin='6', side='r', slot='5/22'),
elm.IcPin(name='PD5', pin='11', side='r', slot='6/22'),
elm.IcPin(name='PD6', pin='12', side='r', slot='7/22'),
elm.IcPin(name='PD7', pin='13', side='r', slot='8/22'),
elm.IcPin(name='PC0', pin='23', side='r', slot='10/22'),
elm.IcPin(name='PC1', pin='24', side='r', slot='11/22'),
elm.IcPin(name='PC2', pin='25', side='r', slot='12/22'),
elm.IcPin(name='PC3', pin='26', side='r', slot='13/22'),
elm.IcPin(name='PC4', pin='27', side='r', slot='14/22'),
elm.IcPin(name='PC5', pin='28', side='r', slot='15/22'),
elm.IcPin(name='PB0', pin='14', side='r', slot='17/22'),
elm.IcPin(name='PB1', pin='15', side='r', slot='18/22'),
elm.IcPin(name='PB2', pin='16', side='r', slot='19/22'),
elm.IcPin(name='PB3', pin='17', side='r', slot='20/22'),
elm.IcPin(name='PB4', pin='18', side='r', slot='21/22'),
elm.IcPin(name='PB5', pin='19', side='r', slot='22/22'),
elm.IcPin(name='RESET', side='l', slot='22/22', invert=True, pin='1'),
elm.IcPin(name='XTAL2', side='l', slot='19/22', pin='10'),
elm.IcPin(name='XTAL1', side='l', slot='17/22', pin='9'),
elm.IcPin(name='AREF', side='l', slot='15/22', pin='21'),
elm.IcPin(name='AVCC', side='l', slot='14/22', pin='20'),
elm.IcPin(name='AGND', side='l', slot='13/22', pin='22'),
elm.IcPin(name='VCC', side='l', slot='11/22', pin='7'),
elm.IcPin(name='GND', side='l', slot='10/22', pin='8')]
super().__init__(pins=pins, w=5, plblofst=.05, botlabel='ATMEGA328', **kwargs)
d = schemdraw.Drawing(fontsize=11, inches_per_unit=.4)
d += (Q1 := Atmega328())
d += (JP4 := elm.Header(rows=10, shownumber=True, pinsright=['D8', 'D9', 'D10', 'D11', 'D12', 'D13', '', '', '', ''], pinalignright='center')
.flip().at((Q1.PB5[0]+4, Q1.PB5[1]+1)).anchor('pin6').label('JP4', fontsize=10))
d += (JP3 := elm.Header(rows=6, shownumber=True, pinsright=['A0', 'A1', 'A2', 'A3', 'A4', 'A5'], pinalignright='center')
.flip().at((Q1.PC5[0]+4, Q1.PC5[1])).anchor('pin6').label('JP3', fontsize=10))
d += (JP2 := elm.Header(rows=8, shownumber=True, pinsright=['D0', 'D1', 'D2', 'D3', 'D4', 'D5', 'D6', 'D7'],
pinalignright='center')).flip().at((Q1.PD7[0]+3, Q1.PD7[1])).anchor('pin8').label('JP2', fontsize=10)
d += elm.OrthoLines(n=6).at(Q1.PB5).to(JP4.pin6)
d += elm.OrthoLines(n=6).at(Q1.PC5).to(JP3.pin6)
d += elm.OrthoLines(n=8).at(Q1.PD7).to(JP2.pin8)
d += elm.Line().left().at(JP4.pin7).length(.9).label('GND', 'left')
d += elm.Line().left().at(JP4.pin8).length(.9).label('AREF', 'left')
d += elm.Line().left().at(JP4.pin9).length(.9).label('AD4/SDA', 'left')
d += elm.Line().left().at(JP4.pin10).length(.9).label('AD5/SCL', 'left')
d += (JP1 := elm.Header(rows=6, shownumber=True, pinsright=['VCC', 'RXD', 'TXD', 'DTR', 'RTS', 'GND'],
pinalignright='center').right().at((Q1.PD0[0]+4, Q1.PD0[1]-2)).anchor('pin1'))
d += elm.Line().left().at(JP1.pin1).length(d.unit/2)
d += elm.Vdd().label('+5V')
d += elm.Line().left().at(JP1.pin2).length(d.unit)
d += elm.Line().up().toy(Q1.PD0)
d += elm.Dot()
d += elm.Line().left().at(JP1.pin3).length(d.unit+0.6)
d += elm.Line().up().toy(Q1.PD1)
d += elm.Dot()
d += elm.Line().left().at(JP1.pin6).length(d.unit/2)
d += elm.Ground()
d += elm.Line().left().at(Q1.XTAL2).length(d.unit*2)
d += elm.Dot()
d.push()
d += elm.Capacitor().left().scale(.75).length(d.unit/2)
d += elm.Line().down().toy(Q1.XTAL1)
d += elm.Dot()
d += elm.Ground()
d += elm.Capacitor().right().scale(.75).length(d.unit/2)
d += elm.Dot()
d.pop()
d += elm.Crystal().down().toy(Q1.XTAL1).label('16MHz', 'bottom')
d += elm.Line().right().tox(Q1.XTAL1)
d += elm.Line().left().at(Q1.AREF).length(d.unit/3).label('AREF', 'left')
d += elm.Line().left().at(Q1.AVCC).length(1.5*d.unit)
d += elm.Vdd().label('+5V')
d += elm.Dot()
d += elm.Line().down().toy(Q1.VCC)
d += elm.Dot()
d += elm.Line().right().tox(Q1.VCC).hold()
d += elm.Capacitor().down().label('100n')
d += (GND := elm.Ground())
d += elm.Line().left().at(Q1.AGND)
d += elm.Line().down().toy(Q1.GND)
d += elm.Dot()
d += elm.Line().right().tox(Q1.GND).hold()
d += elm.Line().down().toy(GND.xy)
d += elm.Line().left().tox(GND.xy)
d += elm.Dot()
d += elm.Line().left().at(Q1.RESET)
d += elm.Dot()
d.push()
d += elm.RBox().up().label('10K')
d += elm.Vdd().label('+5V')
d.pop()
d += elm.Line().left()
d.push()
d += elm.Dot()
d += (RST := elm.Button().up().label('Reset'))
d += elm.Line().left().length(d.unit/2)
d += elm.Ground()
d.pop()
d += elm.Capacitor().left().at(JP1.pin4).label('100n', 'bottom')
d += elm.Line().left().tox(RST.start[0]-2)
d += elm.Line().up().toy(Q1.RESET)
d += elm.Line().right().tox(RST.start)
d.draw()
741 Opamp, DIP Layout¶
d = schemdraw.Drawing()
d += (Q := elm.IcDIP(pins=8)
.label('Offset Null', loc='p1', fontsize=10)
.label('Inverting Input', loc='p2', fontsize=10)
.label('Non-inverting Input', loc='p3', fontsize=10)
.label('V-', loc='p4', fontsize=10)
.label('Offset Null', loc='p5', fontsize=10)
.label('Output', loc='p6', fontsize=10)
.label('V+', loc='p7', fontsize=10)
.label('NC', loc='p8', fontsize=10))
d += elm.Line().at(Q.p2_in).length(d.unit/5)
d += (op := elm.Opamp().anchor('in1').scale(.8))
d += elm.Line().at(Q.p3_in).length(d.unit/5)
d += elm.Line().at(op.out).length(d.unit/14)
d += elm.Line().down().toy(Q.p6_in)
d += elm.Line().right().tox(Q.p6_in)
d += elm.RightLines().at(Q.p4_in).to(op.n1)
d += elm.RightLines().at(Q.p7_in).to(op.n2)
d.draw()