# Anas - @techmannih @mohan-bee @! Rushabh | Linu...

Channel: #contributor
Source: https://discord.com/channels/1233487248129921135/1517498918521409707
Started: 2026-06-19T11:58:56.514000+00:00
Last activity: 2026-06-21T10:47:04.212000+00:00

## Anas — 2026-06-19T11:58:55.942000+00:00

<@1067854999889137715> <@1238122660345548882> <@452450065941004289> 
please anyone can fix this
Attachment: Screenshot_2026-06-19_at_1.57.19_PM.png — https://community.tscircuit.com/media/1517498918017957919
Attachment: Screenshot_2026-06-19_at_1.58.17_PM.png — https://community.tscircuit.com/media/1517498918315884614

## Anas — 2026-06-19T11:59:38.839000+00:00

I see this issue after updating schematic-symbols in core

## ! Rushabh | Linux Shill — 2026-06-19T12:00:00.459000+00:00

will take a look

## ! Rushabh | Linux Shill — 2026-06-19T12:08:58.900000+00:00

For an NPN transistor, the pin numbering depends on the specific transistor model and package. There is no universal pin order.

## ! Rushabh | Linux Shill — 2026-06-19T12:09:07.399000+00:00

What should we follow <@1067854999889137715>

## ! Rushabh | Linux Shill — 2026-06-19T12:10:49.043000+00:00

1 = Emitter, 2 = Base, 3 = Collector seems to be the most commonly used

## ! Rushabh | Linux Shill — 2026-06-19T12:20:50.292000+00:00

<@756504518417711104>

## Anas — 2026-06-19T12:26:45.308000+00:00

yeah thats what core/props follow

## Anas — 2026-06-19T12:27:27.548000+00:00

So make sure schematic-symbols  are following same pattern

## ! Rushabh | Linux Shill — 2026-06-19T12:28:45.589000+00:00

core follow different pattern 
```ts
  initPorts() {
    const pinAliases = {
      pin1: ["collector", "c"],
      pin2: ["emitter", "e"],
      pin3: ["base", "b"],
    }
```

## mohan-bee — 2026-06-19T12:43:33.118000+00:00

maybe we need to update core to match with props. also symbols they are mapped incorrectly. 

pin1: emitter, pin2: collector, pin3: base.

## ! Rushabh | Linux Shill — 2026-06-19T12:56:28.263000+00:00

yes

## ! Rushabh | Linux Shill — 2026-06-19T12:56:49.517000+00:00

schematic-symbols and core both need to be changed ig

## ! Rushabh | Linux Shill — 2026-06-19T13:13:55.012000+00:00

https://github.com/tscircuit/schematic-symbols/pull/429

## ! Rushabh | Linux Shill — 2026-06-19T13:14:04.441000+00:00

<@1067854999889137715>

## Anas — 2026-06-19T15:27:19.139000+00:00

Did we follow this rn?
Attachment: Screenshot_2026-06-19_at_5.26.59_PM.png — https://community.tscircuit.com/media/1517551360508301382

## ! Rushabh | Linux Shill — 2026-06-19T15:43:41.574000+00:00

we follow this rn for npn but not pnp

## ! Rushabh | Linux Shill — 2026-06-19T15:49:26.331000+00:00

we can just fix pnp to follow the same ig
currently pnp
Attachment: image.png — https://community.tscircuit.com/media/1517556926534385734

## ! Rushabh | Linux Shill — 2026-06-19T15:54:14.686000+00:00

https://github.com/tscircuit/schematic-symbols/pull/430

## ! Rushabh | Linux Shill — 2026-06-19T15:57:17.168000+00:00

<@756504518417711104>

## ! Rushabh | Linux Shill — 2026-06-19T15:58:49.701000+00:00

now we need to fix the same in core

## ! Rushabh | Linux Shill — 2026-06-19T17:27:06.957000+00:00

https://github.com/tscircuit/props/pull/698

## techmannih — 2026-06-19T17:46:01.234000+00:00

<@452450065941004289>, make sure you get a review from Rishabh or Seve. Previously We got stuck on this once before and that creates a lot of issues iirc

## ! Rushabh | Linux Shill — 2026-06-19T17:52:45.912000+00:00

the updated schematic-symbol aligne with this image

## ! Rushabh | Linux Shill — 2026-06-19T17:53:16.777000+00:00

in order to update the core we need to update to props first

## ! Rushabh | Linux Shill — 2026-06-19T17:53:34.184000+00:00

https://github.com/tscircuit/props/pull/698 <@809856037376491570> can you take a look

## ! Rushabh | Linux Shill — 2026-06-21T10:47:04.212000+00:00

<@809856037376491570>