mirror of
https://github.com/diodeinc/pcb.git
synced 2026-09-14 20:17:19 +08:00
Akhil Velagapudi
4413c9d4d9
* Hydrate V2 deps during migrate * Fix mixed hydrated package resolution * Simplify workspace discovery * Clean up workspace package discovery naming * Update stdlib formatting paths
101 lines
2.2 KiB
Python
101 lines
2.2 KiB
Python
"""Test for SPICE model of LED - demonstrates forward voltage drop for different colors."""
|
|
|
|
load("../../interfaces.zen", "Ground", "Net", "Power")
|
|
load("../../properties.zen", "Simulation")
|
|
|
|
Led = Module("../../generics/Led.zen")
|
|
Resistor = Module("../../generics/Resistor.zen")
|
|
|
|
VCC = Power()
|
|
PROBE_RED = Net()
|
|
PROBE_GREEN = Net()
|
|
PROBE_BLUE = Net()
|
|
GND = Ground()
|
|
|
|
# Red LED - ~1.8V forward voltage
|
|
Led(
|
|
name="LED1",
|
|
package="0603",
|
|
color="red",
|
|
A=VCC,
|
|
K=PROBE_RED,
|
|
)
|
|
|
|
# Current limiting resistor for red LED
|
|
Resistor(
|
|
name="R1",
|
|
value="150ohms", # (5V - 1.8V) / 20mA = 160Ω
|
|
package="0603",
|
|
P1=PROBE_RED,
|
|
P2=GND,
|
|
)
|
|
|
|
# Green LED - ~2.2V forward voltage
|
|
Led(
|
|
name="LED2",
|
|
package="0603",
|
|
color="green",
|
|
A=VCC,
|
|
K=PROBE_GREEN,
|
|
)
|
|
|
|
# Current limiting resistor for green LED
|
|
Resistor(
|
|
name="R2",
|
|
value="140ohms", # (5V - 2.2V) / 20mA = 140Ω
|
|
package="0603",
|
|
P1=PROBE_GREEN,
|
|
P2=GND,
|
|
)
|
|
|
|
# Blue LED - ~3.2V forward voltage
|
|
Led(
|
|
name="LED3",
|
|
package="0603",
|
|
color="blue",
|
|
A=VCC,
|
|
K=PROBE_BLUE,
|
|
)
|
|
|
|
# Current limiting resistor for blue LED
|
|
Resistor(
|
|
name="R3",
|
|
value="90ohms", # (5V - 3.2V) / 20mA = 90Ω
|
|
package="0603",
|
|
P1=PROBE_BLUE,
|
|
P2=GND,
|
|
)
|
|
|
|
Simulation(
|
|
name="test_Led",
|
|
setup=f"""
|
|
# Test LED SPICE model - shows different forward voltages for different colors
|
|
V1 {VCC} {GND} DC 5V
|
|
|
|
.control
|
|
# DC operating point analysis
|
|
op
|
|
|
|
# Print currents and voltages to verify LED behavior
|
|
print v({VCC}) v({PROBE_RED}) v({PROBE_GREEN}) v({PROBE_BLUE})
|
|
print i(VLED1) i(VLED2) i(VLED3)
|
|
|
|
# DC sweep to show LED turn-on characteristics
|
|
dc V1 0 5 0.05
|
|
|
|
# Save the output to SVG
|
|
set hcopydevtype = svg
|
|
hardcopy output/led.svg v({PROBE_RED}) v({PROBE_GREEN}) v({PROBE_BLUE}) title "LED Forward Voltage Comparison" xlabel "Supply Voltage" ylabel "Cathode Voltage"
|
|
.endc
|
|
""",
|
|
)
|
|
|
|
# pcb:sch LED1.LED x=138.7000 y=-133.0800 rot=270
|
|
# pcb:sch LED2.LED x=329.2000 y=-133.0800 rot=270
|
|
# pcb:sch LED3.LED x=519.7000 y=-133.0800 rot=270
|
|
# pcb:sch R1.R x=153.9400 y=-26.4000 rot=0
|
|
# pcb:sch R2.R x=344.4400 y=-26.4000 rot=0
|
|
# pcb:sch R3.R x=534.9400 y=-26.4000 rot=0
|
|
# pcb:sch GND.1 x=341.9000 y=151.4000 rot=0
|
|
# pcb:sch VCC.1 x=346.9800 y=-305.8000 rot=0
|