diff --git a/lib/index.ts b/lib/index.ts
index ed08f393..776df41d 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -8,6 +8,7 @@ export * from "./hooks/use-diode"
 export * from "./hooks/use-led"
 export * from "./hooks/use-resistor"
 export * from "./utils/public-exports"
+export * from "./sel"
 
 // Allows easier introspection of render process
 export * from "./components/base-components/Renderable"
diff --git a/lib/sel/index.ts b/lib/sel/index.ts
new file mode 100644
index 00000000..1b5183b8
--- /dev/null
+++ b/lib/sel/index.ts
@@ -0,0 +1 @@
+export * from "./sel"
diff --git a/lib/sel/sel-utility-types.ts b/lib/sel/sel-utility-types.ts
new file mode 100644
index 00000000..0ae23103
--- /dev/null
+++ b/lib/sel/sel-utility-types.ts
@@ -0,0 +1,189 @@
+export type Nums16 =
+  | "1"
+  | "2"
+  | "3"
+  | "4"
+  | "5"
+  | "6"
+  | "7"
+  | "8"
+  | "9"
+  | "10"
+  | "11"
+  | "12"
+  | "13"
+  | "14"
+  | "15"
+  | "16"
+
+export type Nums40 =
+  | "1"
+  | "2"
+  | "3"
+  | "4"
+  | "5"
+  | "6"
+  | "7"
+  | "8"
+  | "9"
+  | "10"
+  | "11"
+  | "12"
+  | "13"
+  | "14"
+  | "15"
+  | "16"
+  | "17"
+  | "18"
+  | "19"
+  | "20"
+  | "21"
+  | "22"
+  | "23"
+  | "24"
+  | "25"
+  | "26"
+  | "27"
+  | "28"
+  | "29"
+  | "30"
+  | "31"
+  | "32"
+  | "33"
+  | "34"
+  | "35"
+  | "36"
+  | "37"
+  | "38"
+  | "39"
+  | "40"
+
+export type PinNumbers100 =
+  | "pin1"
+  | "pin2"
+  | "pin3"
+  | "pin4"
+  | "pin5"
+  | "pin6"
+  | "pin7"
+  | "pin8"
+  | "pin9"
+  | "pin10"
+  | "pin11"
+  | "pin12"
+  | "pin13"
+  | "pin14"
+  | "pin15"
+  | "pin16"
+  | "pin17"
+  | "pin18"
+  | "pin19"
+  | "pin20"
+  | "pin21"
+  | "pin22"
+  | "pin23"
+  | "pin24"
+  | "pin25"
+  | "pin26"
+  | "pin27"
+  | "pin28"
+  | "pin29"
+  | "pin30"
+  | "pin31"
+  | "pin32"
+  | "pin33"
+  | "pin34"
+  | "pin35"
+  | "pin36"
+  | "pin37"
+  | "pin38"
+  | "pin39"
+  | "pin40"
+  | "pin41"
+  | "pin42"
+  | "pin43"
+  | "pin44"
+  | "pin45"
+  | "pin46"
+  | "pin47"
+  | "pin48"
+  | "pin49"
+  | "pin50"
+  | "pin51"
+  | "pin52"
+  | "pin53"
+  | "pin54"
+  | "pin55"
+  | "pin56"
+  | "pin57"
+  | "pin58"
+  | "pin59"
+  | "pin60"
+  | "pin61"
+  | "pin62"
+  | "pin63"
+  | "pin64"
+  | "pin65"
+  | "pin66"
+  | "pin67"
+  | "pin68"
+  | "pin69"
+  | "pin70"
+  | "pin71"
+  | "pin72"
+  | "pin73"
+  | "pin74"
+  | "pin75"
+  | "pin76"
+  | "pin77"
+  | "pin78"
+  | "pin79"
+  | "pin80"
+  | "pin81"
+  | "pin82"
+  | "pin83"
+  | "pin84"
+  | "pin85"
+  | "pin86"
+  | "pin87"
+  | "pin88"
+  | "pin89"
+  | "pin90"
+  | "pin91"
+  | "pin92"
+  | "pin93"
+  | "pin94"
+  | "pin95"
+  | "pin96"
+  | "pin97"
+  | "pin98"
+  | "pin99"
+  | "pin100"
+
+export type CommonPinNames =
+  | "pos"
+  | "neg"
+  | "V5"
+  | "V3_3"
+  | "VCC"
+  | "VDD"
+  | "GND"
+  | `D${Nums40}`
+  | `GP${Nums40}`
+  | `GPIO${Nums40}`
+  | "DP"
+  | "DN"
+  | "VIN"
+  | "VOUT"
+  | "VREF"
+  | "VIN"
+  | "VOUT"
+  | "VREF"
+  | "VIN"
+  | "VOUT"
+  | "VREF"
+  | `A${Nums40}`
+  | `B${Nums40}`
+  | PinNumbers100
+
+export type TransistorPinNames = "base" | "collector" | "emitter"
diff --git a/lib/sel/sel.ts b/lib/sel/sel.ts
new file mode 100644
index 00000000..bfa914a2
--- /dev/null
+++ b/lib/sel/sel.ts
@@ -0,0 +1,68 @@
+import type {
+  CommonPinNames,
+  Nums16,
+  Nums40,
+  PinNumbers100,
+  TransistorPinNames,
+} from "./sel-utility-types"
+
+type NonPolarizedSel = Record<
+  `R${Nums40}` | `SW${Nums40}`,
+  {
+    pin1: string
+    pin2: string
+    pos: string
+    neg: string
+  }
+>
+
+type PolarizedSel = Record<
+  | `C${Nums40}`
+  | `L${Nums40}`
+  | `LED${Nums40}`
+  | `D${Nums40}`
+  | `Y${Nums40}`
+  | `B${Nums16}`,
+  {
+    pin1: string
+    pin2: string
+    anode: string
+    cathode: string
+    pos: string
+    neg: string
+  }
+>
+
+type TransistorSel = Record<`Q${Nums40}`, Record<TransistorPinNames, string>>
+
+type JumperSel = Record<`J${Nums40}`, Record<PinNumbers100, string>>
+
+type ChipSel = Record<`U${Nums40}`, Record<CommonPinNames, string>>
+
+type NetSel = Record<"net", Record<"VCC" | "GND" | "VDD", string>>
+
+export type Sel = NonPolarizedSel &
+  PolarizedSel &
+  TransistorSel &
+  JumperSel &
+  ChipSel &
+  NetSel
+
+export const sel: Sel = new Proxy(
+  {},
+  {
+    get: (_, prop1: string) => {
+      return new Proxy(
+        {},
+        {
+          get: (_, prop2: string) => {
+            if (prop1 === "net") {
+              return `net.${prop2}`
+            }
+            return `.${prop1} > .${prop2}`
+          },
+        },
+      )
+    },
+  },
+) as any
diff --git a/tests/sel/sel1.test.ts b/tests/sel/sel1.test.ts
new file mode 100644
index 00000000..8ce6703a
--- /dev/null
+++ b/tests/sel/sel1.test.ts
@@ -0,0 +1,29 @@
+import { sel } from "lib/sel"
+import { test, expect } from "bun:test"
+
+test("sel1 - sel.R1.pos = .R1 > .pos", () => {
+  expect(sel.R1.pos).toBe(".R1 > .pos")
+})
+
+test("sel1 - sel.U1.VCC = .U1 > .VCC", () => {
+  expect(sel.U1.VCC).toBe(".U1 > .VCC")
+})
+
+test("sel1 - invalid refdes", () => {
+  // @ts-expect-error
+  const someval = sel.ASDF1.pin1
+})
+
+test("sel1 - invalid net", () => {
+  // @ts-expect-error
+  const someval = sel.net.ASDF1
+})
+
+test("sel1 - invalid pin number", () => {
+  // @ts-expect-error
+  const someval = sel.R1.pin3
+})
+
+test("sel1 - sel.net.VCC = net.VCC", () => {
+  expect(sel.net.VCC).toBe("net.VCC")
+})