typeCAD Passives

This is a typeCAD package that includes simple access to many passive components.

Resistors, capacitors, LEDs, diodes, fuses, and inductors

This package uses a named parameter-like interface. Any value can be included or left out. They can be access and modified later in code.

import { Schematic } from '@typecad/typecad'
import { Resistor, LED, Capacitor, Diode, Inductor, Fuse } from './module/passives/0805'
import  *  as _0603 from './module/passives/0603'

let typecad = new Schematic('passives');

let resistor = new Resistor({ reference: "R1", value: "4.7 kOhm" });
let capacitor = new Capacitor({value: "100 nF", voltage: "6 V"});
let diode = new Diode();
let inductor = new Inductor({ value: "2.2 uH"});
let fuse = new Fuse({ reference: "F1" });
let led = new _0603.LED();      // a 0603 instead of 0805

typecad.create(resistor, led, capacitor, inductor, diode, fuse);

Other sizes are:

• ./module/passives/0603
• ./module/passives/0402
• ./module/passives/0201 *no fuses

Auto designation

If { reference } is not included, the component will be auto-numbered. If there are any name collisions, the new name will be suffixed with a _1, ie R1_1.

Watch out☠️

If auto-designation is used, components have the potential to move/switch/replace each other in the PCB Editor. The first component created will be x1, then x2 and so on. If there is a component added above x1 in the code, that topmost component will now be x1 and the old x1 will now be x2. This will cause them to switch places when imported into the PCB Editor. Specifying the reference for every component avoids this.

Connectors

Connectors can be created similarly.

import { Connector } from './module/passives/connector'

// create a 10-pin connector using the JST footprint passed in the last parameter
let j1 = new Connector({ number: 10, footprint:"Connector_JST:JST_SH_SM10B-SRSS-TB_1x10-1MP_P1.00mm_Horizontal" });
// create a 5-pin connector using a default 2.54 mm pin-header
let j2 = new Connector({ number: 5 });

Power

Power is abstracted in typeCAD. This package includes a Power class which progressively does more as different parameters are passed.

let vcc_3v3 = new Power({ voltage: 3.3 });

• creates a Power instance, voltage is optional, but allows for assertion checking voltage ranges

---

let lipo = new Power({ voltage: 3.3, maximum: 4.2, minimum: 3.2 });

• passing optional maximum and minimum allows for more voltage assertions

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let typecad = new Schematic('power');
let lipo = new Power({ voltage: 3.3, schematic: typecad });

• creates a power (VCC, VDC, +3V3) symbol named 3.3:power
• creates a ground symbol named ground

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let typecad = new Schematic('power');
let vcc_5v0 = new Power({ voltage: 5.0, schematic: typecad, power_name: "+5v0", power_flag: true});

• creates a power symbol named +5v0:power
• creates a PWR_Flag attached to power for ERC
• creates a ground symbol named ground

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let typecad = new Schematic('power');
let iso_3v3 = new Power({voltage: 3.3, schematic: typecad, ground_flag: true, ground_name: "iso_ground"});

• creates a power symbol named 3.3:power
• creates a ground symbol named iso_ground with a PWR_Flag attached

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