
Vector gen
qu1j0t3/vector_gen
In first version of PCB there is a bug that leaves U6 Vss/Vdd pins floating and U5 Vdd floating:
The LM336 is a voltage Reference made by Texas Instruments in a TO-92-3 package with 3 pins. TO-92-3 Voltage Reference ROHS.
JLCPCB lists it (part C9406). 5 open-source boards in 4 repositories on GitHub use it.
The library has no symbol for this part yet.
The library has no footprint for this part yet.

qu1j0t3/vector_gen
In first version of PCB there is a bug that leaves U6 Vss/Vdd pins floating and U5 Vdd floating:

simlun/i2c-weight-scale
I²C Weight Scale: strain gauges in a Wheatstone bridge amplified in an instrumentation amplifier, A/D converted and made available over I²C in a PIC microcontroller



TO-92-3, with 3 pins.
JLCPCB lists it as part C9406, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the TL431ACLPR by Texas Instruments, the CJ431K by Jiangsu Changjing Electronics Technology (CJ), the TL431ILPR by Texas Instruments and the L78L12ABZ by STMicroelectronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.
5 boards in 4 repositories on GitHub; the most starred are listed on this page, with their KiCad files.