Added Footprint To-92 (#123)

* added to92 footprinter

* modify to92 footprinter

* modify to92 footprinter od and id

* modify to92 footprinter

* added to92 and to92_inline

src/fn/index.ts

@@ -30,3 +30,4 @@ export { sot235 } from "./sot235"
 export { breakoutheaders } from "./breakoutheaders"
 export { hc49 } from "./hc49"
 export { pad } from "./pad"
+export { to92 } from "./to92"

src/fn/to92.ts

@@ -0,0 +1,86 @@
+import {
+  length,
+  type AnySoupElement,
+  type PcbSilkscreenPath,
+} from "circuit-json"
+import { z } from "zod"
+import { platedhole } from "src/helpers/platedhole"
+import { silkscreenRef, type SilkscreenRef } from "../helpers/silkscreenRef"
+
+const generate_semicircle = (
+  centerX: number,
+  centerY: number,
+  radius: number,
+) => {
+  return Array.from({ length: 25 }, (_, i) => {
+    const theta = (i / 24) * Math.PI
+    return {
+      x: centerX + Math.cos(theta) * radius,
+      y: centerY + Math.sin(theta) * radius,
+    }
+  })
+}
+
+export const to92_def = z.object({
+  fn: z.string(),
+  p: length.optional().default("1.27mm"),
+  id: length.optional().default("0.72mm"),
+  od: length.optional().default(".95mm"),
+  w: length.optional().default("4.5mm"),
+  h: length.optional().default("4.5mm"),
+  arrangement: z
+    .enum(["triangular", "inline"])
+    .optional()
+    .default("triangular"),
+})
+
+export type To92Def = z.input<typeof to92_def>
+
+export const to92 = (
+  raw_params: To92Def,
+): { circuitJson: AnySoupElement[]; parameters: any } => {
+  const parameters = to92_def.parse(raw_params)
+  const { p, id, od, w, h, arrangement } = parameters
+  const radius = w / 2
+  const holeY = h / 2
+
+  const plated_holes =
+    arrangement === "triangular"
+      ? [
+          platedhole(1, 0, holeY, id, od),
+          platedhole(2, -p, holeY - p, id, od),
+          platedhole(3, p, holeY - p, id, od),
+        ]
+      : [
+          platedhole(1, -p, holeY, id, od),
+          platedhole(2, 0, holeY, id, od),
+          platedhole(3, p, holeY, id, od),
+        ]
+
+  const semicircle = generate_semicircle(0, h / 2, radius)
+
+  const silkscreenBody: PcbSilkscreenPath = {
+    type: "pcb_silkscreen_path",
+    layer: "top",
+    pcb_component_id: "",
+    route: [
+      ...semicircle,
+      { x: -radius, y: 0 },
+      { x: radius, y: 0 },
+      semicircle[0],
+    ],
+    stroke_width: 0.1,
+    pcb_silkscreen_path_id: "",
+  }
+
+  const silkscreenRefText: SilkscreenRef = silkscreenRef(0, h / 2 + 1, 0.5)
+
+  return {
+    circuitJson: [
+      ...plated_holes,
+      silkscreenBody,
+      silkscreenRefText as AnySoupElement,
+    ],
+    parameters,
+  }
+}

src/footprinter.ts

@@ -56,6 +56,7 @@ export type Footprinter = {
   axial: () => FootprinterParamsBuilder<"p" | "id" | "od">
   hc49: () => FootprinterParamsBuilder<"p" | "id" | "od" | "w" | "h">
   sot235: () => FootprinterParamsBuilder<"h" | "p" | "pl" | "pw">
+  to92: () => FootprinterParamsBuilder<"w" | "h" | "p" | "id" | "od">
   lqfp: (num_pins?: number) => FootprinterParamsBuilder<"w" | "h" | "pl" | "pw">
   pushbutton: () => FootprinterParamsBuilder<
     "tllabel" | "trlabel" | "bllabel" | "brlabel"

tests/to92.test.ts

@@ -0,0 +1,21 @@
+import { test, expect } from "bun:test"
+import { convertCircuitJsonToPcbSvg } from "circuit-to-svg"
+import { to92 } from "../src/fn/to92"
+
+test("to92 (triangular)", () => {
+  const soup = to92({ fn: "to92", arrangement: "triangular" }).circuitJson
+  const svgContent = convertCircuitJsonToPcbSvg(soup)
+
+  expect(soup).toBeDefined()
+  expect(soup.length).toBeGreaterThan(0)
+  expect(svgContent).toMatchSvgSnapshot(import.meta.path, "to92_triangular")
+})
+
+test("to92_inline (inline)", () => {
+  const soup = to92({ fn: "to92_inline", arrangement: "inline" }).circuitJson
+  const svgContent = convertCircuitJsonToPcbSvg(soup)
+
+  expect(soup).toBeDefined()
+  expect(soup.length).toBeGreaterThan(0)
+  expect(svgContent).toMatchSvgSnapshot(import.meta.path, "to92_inline")
+})