from math import floor
from jitx import (
Circle,
Circuit,
Component,
Copper,
Landpattern,
Pad,
PadMapping,
Pin,
Port,
Pour,
Symbol,
SymbolMapping,
landpattern,
rectangle,
)
from jitx.anchor import Anchor
from jitx.shapes.primitive import Text
from jitx.symbol import Direction
[docs]
class Launch(Pad):
shape = rectangle(0.5, 0.5, anchor=Anchor.W)
[docs]
class Electrodelp(Landpattern):
def __init__(self, width=10.0, length=30.0):
self.p = {1: Launch().at(0.0, length / 2), 2: Launch().at(0.0, -length / 2)}
# self.B1 = Copper(rectangle(width=width, height=0.5, anchor=Anchor.W), 0)
[docs]
class CapSymbol(Symbol):
pin_name_size = 0.7874
pad_name_size = 0.7874
A = Pin((-5, 2), 2, Direction.Left)
B = Pin((-5, 0), 2, Direction.Left)
draws = [
Text(">VALUE", 0.55559, Anchor.C).at((0, 4.08741)),
Text(">REF", 0.55559, Anchor.C).at((0, 4.87481)),
# Main body rectangle
rectangle(10.00002, 8.00002),
# Interdigital finger patterns - representing the sensor electrodes
# Top electrode fingers (connected to pin A)
rectangle(0.3, 2.5).at(-3.5, 1.5),
rectangle(0.3, 2.5).at(-2.5, 1.5),
rectangle(0.3, 2.5).at(-1.5, 1.5),
rectangle(0.3, 2.5).at(-0.5, 1.5),
rectangle(0.3, 2.5).at(0.5, 1.5),
rectangle(0.3, 2.5).at(1.5, 1.5),
rectangle(0.3, 2.5).at(2.5, 1.5),
rectangle(0.3, 2.5).at(3.5, 1.5),
# Bottom electrode fingers (connected to pin B)
rectangle(0.3, 2.5).at(-3.0, -1.5),
rectangle(0.3, 2.5).at(-2.0, -1.5),
rectangle(0.3, 2.5).at(-1.0, -1.5),
rectangle(0.3, 2.5).at(0.0, -1.5),
rectangle(0.3, 2.5).at(1.0, -1.5),
rectangle(0.3, 2.5).at(2.0, -1.5),
rectangle(0.3, 2.5).at(3.0, -1.5),
# Capacitive field indication circles
Circle(radius=0.15).at(-3.0, 0.5),
Circle(radius=0.15).at(-2.0, 0.5),
Circle(radius=0.15).at(-1.0, 0.5),
Circle(radius=0.15).at(0.0, 0.5),
Circle(radius=0.15).at(1.0, 0.5),
Circle(radius=0.15).at(2.0, 0.5),
Circle(radius=0.15).at(3.0, 0.5),
Circle(radius=0.15).at(-2.5, -0.5),
Circle(radius=0.15).at(-1.5, -0.5),
Circle(radius=0.15).at(-0.5, -0.5),
Circle(radius=0.15).at(0.5, -0.5),
Circle(radius=0.15).at(1.5, -0.5),
Circle(radius=0.15).at(2.5, -0.5),
# Connection indicators
Circle(radius=0.3).at(-4.00001, 2.00001), # Pin A indicator
Circle(radius=0.3).at(-4.00001, 0.00001), # Pin B indicator
# Decorative corner elements
Circle(radius=0.2).at(-4.5, 3.5),
Circle(radius=0.2).at(4.5, 3.5),
Circle(radius=0.2).at(-4.5, -3.5),
Circle(radius=0.2).at(4.5, -3.5),
# Touch indication symbol in top right
Text("⚡", 0.8, Anchor.C).at((3.5, 3.0)),
]
[docs]
class Electrode(Component):
symbol = CapSymbol()
A = Port()
B = Port()
def __init__(self, width=10.0, length=30.0):
self.landpattern = Electrodelp(width, length)
self.mappings = [
SymbolMapping(
{
self.A: self.symbol.A,
self.B: self.symbol.B,
}
),
PadMapping(
{
self.A: self.landpattern.p[1],
self.B: self.landpattern.p[2],
}
),
]
[docs]
class CapTouch(Circuit):
A = Port()
B = Port()
def __init__(self, width=10.0, length=30.0, pitch=0.1, bar_width=0.5):
self.e = Electrode(width=width, length=length).at(0.0, 0.0)
self.nets = [
self.A
+ self.e.A
+ Copper(
rectangle(width=width, height=bar_width, anchor=Anchor.W).at(
0.0, length / 2
),
0,
),
self.B
+ self.e.B
+ Copper(
rectangle(width=width, height=bar_width, anchor=Anchor.W).at(
0.0, -length / 2
),
0,
),
]
num_fingies = floor(width / (pitch * 4))
offset = pitch * 2 + bar_width
self.fingies = [
self.A
+ Copper(
rectangle(pitch, length - offset).at(pitch * (idx * 4 + 1), pitch), 0
)
for idx in range(num_fingies)
]
self.fingoos = [
self.B
+ Copper(
rectangle(pitch, length - offset).at(pitch * (idx * 4 + 3), -pitch), 0
)
for idx in range(num_fingies)
]
