Good transistors to have in my kit?

Other Hardware General Electronics
21

Nice.

I have ordered:

  • 8750 pcs. Kit with 1206 reaistors (sample book)
  • 2000 pcs kit with 1206 capacitors (sample book)
  • 200 pcs AO4419
  • 200 pcs. AO4484
  • 200 pcs. SI2302DS
  • 200 pcs. NDP6020P
  • 200 pcs. IRLML2502TRPBF
  • 200 pcs. AO4409
  • 200 pcs. AO3401
  • a lot of LDO regulators :slight_smile:
22

That appears to be some impressive panic buying. Are you sure that you'll still be able to get hold of enough MCU chips to make use of all that lot?
I wanted to replenish my stocks of load switches TPS27081ADDCR. I must wait until 15.06.2022 so I'll make these from discrete components. But generally, I'm cutting back on my buying mainly because I am running out of storage space.

23

Quite honestly, I've been eyeing the news and wondering if I should try to stock up from Ali before the shipping slows or shipping prices go sky high... BTW I do support my local maker store too.

24

Have a similar inventory here; never need to order anything again :wink: .

A few more items for you to order:

Or

https://www.leevalley.com/en-ca/shop/home/storage/containers/44948-watchmakers-cases-in-aluminum-cases?item=27K2202

27K2202-33mm-set-of-40-cases-f-07
27K2202-33mm-set-of-40-cases-f-071229×1326 90.7 KB

25

I thought so too, but then I was proven wrong. :slight_smile:

26

I think i allready have all that, exept inductors and SMD switches. Can you give me some scenarioes that i can use an 1206 inductor?

27

Recommend adding a 100uH inductor on the output of all Boost or Buck converters for noise suppression.

1206 for current capacity.

Also good for to prevent noise from feeding back into circuitry from switching a high current load.

28

Hi,
Have you got any protoboard/stripboard/veroboard to built your prototypes on?
You also need a set of standard through hole components, resistors and capacitors.

Tom... :smiley: :+1: :coffee: :australia:

29

I hava a lot of that allready. :slight_smile:

30

I have not experienced any scenarios so far regarding the need for Inductors. But i'm not an advanced user... yet...

31

FB1 is the ferrite bead in the following schematic.

A
A2250×1690 277 KB

image

image

32

Nice LarryD :slight_smile:

But what about values? Is bigger better? Is 1206 100uH a good allrounder? Or do i need to buy sample book?

33

I just use 100uH ferrites.

They have performed well at this rating. (i.e. 1206 and 100uH)

Some day I'll probably get an assortment, but have not as of yet.

I ordered 200, 1206 100uH a while back, have about ~ 120 left still.

34

Okay.

Is there any bad sides regards to add an 100uH 1206 inductor? Or is it a good thing to add always?

35

Whenever I have a DC to DC converter powering a circuit I use a ferrite bead.

This includes commercial USB 5v power supplies like

image
image1430×1456 48.5 KB

Other than that I don’t use them for anything else.

36

I see.

But back to the adapter... :slight_smile:

How can i make an adapter with to solder pads that connects the gate resistor when the solder pads is bridged with solder? I can't figure out how i can make the gate tied to the mosfet when the solder pads is not bridged.

37

"I can't figure out how i can make the gate tied to the mosfet when the solder pads is not bridged."

Not sure what you are saying, perhaps this ?

2021-10-20_23-11-26
2021-10-20_23-11-26790×460 48.5 KB

2021-10-20_23-20-15

EDIT
But not having the jumper option and soldering a zero ohm resistor is another option too.

38

I see.

So it's easier to just use an resistor with value 0 ohm or higher i think?

39

I often use a 0 ohm resistor for stuff like that, that's why I suggested you buy 200+

  • 1206 and 0805 SMD zero ohm resistors, quantity of 200 each (good for jumper options)

Here is another option:

2021-10-20_23-42-45

40

Those zero ohm SMD resistors are also useful when enabling the external antenna ports on the ESP8266 and the ESP32.