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It depends on what you want to do. Forgive me, but a transistor is such a basic component, it almost seems like a solution in search of a problem?
What I mean is, my natural response is to ask, "what do you need it for?"
I know that's not that helpful, but it's what I've got.
Now, if you want experiment with millions of transistors, in a dual core 240mhz configuration I can point you to a few MCUs. 
To err is human. Fortune favors the monsters.
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Espressif ESP32S3 DevkitC at Amazon[^]
I use the MCU on this devkit for all new ESP32 based projects, and I use this devkit to prototype. There are variations that have more RAM but yeah they're basically the same thing.
To err is human. Fortune favors the monsters.
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resistors - you need resistors  to limit the current when it turns on. less you hear and smell snap, crackle pop
as for the mcu - I'd immediately suggest a raspberry pi dev kit. I'm a yank, so I've been googling rasberry pi for years.
Charlie Gilley
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
Has never been more appropriate.
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Resistance is Futile, Charlie! Didn't you know ?
"If we don't change direction, we'll end up where we're going"
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lol +1
Charlie Gilley
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
Has never been more appropriate.
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Various resistor values, when I first renewed my interest in electronics I bought a resistor assortment. Then when I had a little more experience and knew what values where the most popular I got more of just those values.
The 2n7000 makes a good level converter, say for instance between a 5V uController and a 3.3V sensor.
PartsBin an Electronics Part Organizer - An updated version available!
JaxCoder.com
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At an absolute minimum you're going to need some sort of reusable breadboard(s). You'll also want a power supply and some sort of monitoring devices. A DMM is a must, and since you've specified a digital bent (boring), a logic analyzer would be a great investment. If you have any interest in learning how real transistors work, I'd add an oscilloscope to the bench so you can see stuff that can't be expressed in ones and zeroes.
On top of the instrumentation, you'll need passive components like resistors, capacitors, and inductors. A few diodes will come in handy, too. For small signal work, I recommend laying in a stock of 1N4148 types; for power use, try 1N4001 family types. I try to keep a few 2N2222A NPN transistors around for general purpose stuff, but FETs and MOSFETs take a slightly different approach for design. Pick a type of solution you want to explore, research the active components used most often in that field, then add passive components as appropriate.
Buy some books about semiconductor device physics! You can't build with them if you don't know how they work. Yes, you can build stuff that will work, sometimes, but you can't call yourself competent if you don't understand the physics. Millman & Halkias, Integrated Electronics, is the Bible, in my mind, for understanding electronic device theory. There are better books on specific solid state electronic devices, but that one can't be beat for learning how these things work.
Most importantly, though, is to have fun learning and discovering. There is nothing more important in life, especially for techies. We're not going to find girls, anyway, so why try...
Will Rogers never met me.
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A breadboard is a quick way of arranging and rearranging circuits. A breadboard kit is cheap and comes with LEDs, resistors etc.
Edit: And a multimeter to check p.d's and current.
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Protected ape fixed (11)
Life should not be a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming “Wow! What a Ride!" - Hunter S Thompson - RIP
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Protected
ape COPY
fixed RIGHTED
COPYRIGHTED
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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YAUT 
Life should not be a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming “Wow! What a Ride!" - Hunter S Thompson - RIP
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#Worldle #360 X/6 (98%)
🟩🟩🟩🟩⬜↖️
🟩🟩🟩🟩🟨↖️
🟩🟩🟩🟩🟨↖️
🟩🟩🟩🟩🟨⬆️
🟩🟩🟩🟩🟨⬆️
🟩🟩🟩🟩🟨↗️
https://worldle.teuteuf.fr
I just guessed it wrong
"A little time, a little trouble, your better day"
Badfinger
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#Worldle #360 3/6 (100%)
🟩🟩🟨⬛⬛⬆️
🟩🟩🟩🟩🟨⬆️
🟩🟩🟩🟩🟩🎉
https://worldle.teuteuf.fr
Saw the map for this.
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Wordle 576 4/6
⬜⬜⬜⬜⬜
🟨🟩⬜⬜⬜
⬜🟩🟩🟩⬜
🟩🟩🟩🟩🟩
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Wordle 576 4/6
⬜⬜⬜⬜⬜
⬜🟨🟨⬜⬜
🟨🟩🟩⬜⬜
🟩🟩🟩🟩🟩
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Wordle 576 4/6
🟨🟩⬛⬛⬛
⬛🟩⬛🟩🟩
⬛🟩⬛🟩🟩
🟩🟩🟩🟩🟩
Could have got in 3 atleast... hard luck for my choice of 3rd letter.
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Wordle 576 4/6
🟩🟨🟨⬜⬜
🟩⬜🟩🟨⬜
🟩🟩🟩⬜⬜
🟩🟩🟩🟩🟩
"A little time, a little trouble, your better day"
Badfinger
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Wordle 576 3/6*
⬜🟩🟩⬜⬜
⬜🟩🟩⬜⬜
🟩🟩🟩🟩🟩
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Wordle 576 5/6
⬛⬛🟨⬛⬛
⬛⬛🟨🟨⬛
⬛🟨⬛⬛⬛
⬛🟩🟩🟩🟩
🟩🟩🟩🟩🟩
Damn you 4th guess, damn you all!
GCS/GE d--(d) s-/+ a C+++ U+++ P-- L+@ E-- W+++ N+ o+ K- w+++ O? M-- V? PS+ PE Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X
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Ditto!
Wordle 576 5/6
⬜⬜⬜⬜⬜
⬜🟨🟨⬜⬜
⬜⬜⬜🟨⬜
⬜🟩🟩🟩🟩
🟩🟩🟩🟩🟩
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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Damn my 4th, 5th and 6th guess! 
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Wordle 576 3/6*
🟩🟩⬜⬜⬜
🟩🟩🟩⬜⬜
🟩🟩🟩🟩🟩
Happiness will never come to those who fail to appreciate what they already have. -Anon
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🟨🟩⬜⬜⬜
⬜🟩⬜🟩🟩
🟩🟩🟩🟩🟩
Life should not be a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming “Wow! What a Ride!" - Hunter S Thompson - RIP
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