#use-added-syntax(jitx)
defpackage props :
import core
import collections
import math
import jitx
import jitx/commands
import ocdb/utils/symbols
import ocdb/utils/box-symbol
import ocdb/utils/landpatterns
import ocdb/utils/defaults
import ocdb/utils/generic-components
; Our previously-defined components
pcb-pad rect-smd-pad :
type = SMD
val pad-shape = Rectangle(0.75, 1.0)
shape = pad-shape
layer(SolderMask(Top)) = pad-shape
layer(Paste(Top)) = pad-shape
pcb-landpattern polarized-chip-landpattern :
pad a : rect-smd-pad at loc(1.0, 0.0)
pad c : rect-smd-pad at loc(-1.0, 0.0)
layer(Courtyard(Top)) = Rectangle(3.0, 2.0)
layer(Silkscreen("pol", Top)) = Line(0.30, [Point((- 1.5), (- 1.0)) Point((- 1.5), 1.0)])
layer(Silkscreen("values", Top)) = Text(">REF", 0.7, C, loc(0.0, -1.2))
pcb-component photodiode :
pin a
pin c
landpattern = polarized-chip-landpattern(a => polarized-chip-landpattern.a,
c => polarized-chip-landpattern.c)
val sym = diode-sym(DiodePhoto)
symbol = sym(a => sym.a,
c => sym.c)
reference-prefix = "D"
property(self.responsivity) = 125.0e-6 / 1000.0 ; Current out / light in @850nm (A / lux)
pcb-component op-amp :
pin-properties :
[pin:Ref | pads:Int ...]
[in+ | 3 ]
[in- | 4 ]
[out | 1 ]
[v+ | 5 ]
[v- | 2 ]
assign-landpattern(SOT95P280X145-5N)
symbol = op-amp-sym(self.in+ => op-amp-sym.in+
self.in- => op-amp-sym.in-
self.out => op-amp-sym.out
self.v- => op-amp-sym.v-
self.v+ => op-amp-sym.v+)
pcb-module transimpedance-amplifier (rf:Double, cf:Double):
pin input
pin output
pin vdd
pin gnd
inst op-amp:op-amp
inst decoupling-cap : ceramic-cap(10.0e-6)
; Connect module pins and decoupling to op-amp power pins.
net (vdd op-amp.v+ decoupling-cap.p[1])
net (gnd op-amp.v- decoupling-cap.p[2])
; Add and connect feedback network
inst r : chip-resistor(closest-std-val(rf, 1.0))
inst c : ceramic-cap(cf)
net (gnd op-amp.in+)
net (input, op-amp.in-, r.p[1] c.p[1])
net (output op-amp.out, r.p[2] c.p[2])
schematic-group(self) = trans-amp
pcb-module amplified-photodiode ( photodiode:Instantiable,
supply-voltage:Double,
lux-at-full-range:Double,
target-bandwidth:Double) :
pin output
pin vdd
pin gnd
inst pd : photodiode
; Calculate 1% gain resistor TIDU535
val max-light-current = property(pd.responsivity) * lux-at-full-range
val target-gain-resistance = closest-std-val(supply-voltage / max-light-current, 1.0)
; Calculate feedback capacitor for stability at bandwidth
val cf = closest-std-val(1.0 / (2.0 * PI * target-gain-resistance * target-bandwidth) * 0.9, 10.0)
inst amp : transimpedance-amplifier(target-gain-resistance, cf)
net (pd.c amp.input)
net (output amp.output)
net (gnd pd.a amp.gnd)
net (vdd amp.vdd)
schematic-group(pd) = schematic-group(amp)
; New code
pcb-bundle i2c:
pin sda
pin scl
pcb-component thermocouple-amplifier :
manufacturer = "Microchip"
mpn = "MCP9600"
description = "Thermocouple EMF to Temperature Converter, ±1.5°C Maximum Accuracy"
port i2c-node : i2c
pin-properties :
[pin:Ref | pads:Int ... | side:Dir ]
[GND | 1, 3, 5, 6, 7, 9, 10, 13, 17, 18, 21 | Down ]
[Vin+ | 2 | Right ]
[Vin- | 4 | Right ]
[Vdd | 8 | Up ]
[Alert[1] | 11 | Left ]
[Alert[2] | 12 | Left ]
[Alert[3] | 14 | Left ]
[Alert[4] | 15 | Left ]
[ADDR | 16 | Left ]
[i2c-node.scl | 19 | Left ]
[i2c-node.sda | 20 | Left ]
make-box-symbol()
assign-landpattern(qfn-landpattern(0.65, 5.0, 20, 0.3, 0.4, [3.25 3.25]))
pcb-component microcontroller :
port i2c-controller : i2c
pin-properties :
[pin:Ref | pads:Int ... | side:Dir]
[i2c-controller.scl | 1 | Right]
[i2c-controller.sda | 2 | Right]
for i in 3 to 14 do :
[PA[i] | i + 1 | Right]
[vdd | 15 | Up]
[gnd | 16 | Down]
make-box-symbol()
assign-landpattern(soic127p-landpattern(16))
pcb-module my-design :
inst K : thermocouple-amplifier
inst mcu : microcontroller
net (K.i2c-node, mcu.i2c-controller)
inst high-sensitivity-photodiode : amplified-photodiode(photodiode, 3.3, 500.0, 1.0e6)
net (high-sensitivity-photodiode.output mcu.PA[4])
inst connector : pin-header(3)
; Set up power connections
net GND (high-sensitivity-photodiode.gnd connector.p[1] mcu.gnd K.GND)
net VDD (high-sensitivity-photodiode.vdd connector.p[2] mcu.vdd K.Vdd)
symbol(GND) = ocdb/utils/symbols/ground-sym
symbol(VDD) = ocdb/utils/symbols/supply-sym
make-default-board(my-design, 4, Rectangle(25.0, 10.0))
view-board()
view-schematic()