An unknown/missing ic needs replacing

[K-Experiment]

I want to make my own soldering station and i was thinking of creating a hakko 936.
but there is one ic that i couldnt buy from lcsc so can you help me?
 the ic is a low power quad op amp: Nec uPC324




and if i may ask, how much current does it need from the transformer? is it 2.5A?

[oPossum]

https://lcsc.com/search?q=lm324

[K-Experiment]

sorry im still new to electronics and im quite bad at reading datasheets but
are you sure its an exact replacement?

[ledtester]

It's the same "324" op-amp. TI uses an "LM" prefix whereas NEC uses "uPC" to identify its parts.

Attached are the datasheets. Note that the schematic diagrams are identical save a current source of 4uA in the TI diagram which has a value of 6uA in the NEC version.

I bet the uPC324 was the chip the author found on his board when reverse engineering it, but they wrote "LM324" next to all of the op-amps to indicate than any 324 op-amp would work.

[amyk]

The uPC1701C is going to be the hardest part to get if you want to make a "true" 936 clone.

All the clones available use something simpler and cheaper instead, but some of them are designed for thermocouple sensors; here's one that uses the original thermistor type sensor: https://ai.esmplus.com/jnkgloballtd/solderingstation/lm358_simple.png

[ledtester]

Here's an eevblog thread on suitable replacements for the 1701:

https://www.eevblog.com/forum/projects/finding-an-obscure-part-for-the-hakko-936b-(nec-upc1701)/

[K-Experiment]

so the uPC1701 can be replaced with a UAA2016?