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Description
LIU EENG400L Components KitEENG400L: Electrical and Electronic BJT and JFET Frequency Response: Resistors: 10 , 47 , 560 , 1. 0K , 3. 9K , 2*10K , 68K . Transistor: 1*2N3904 npn. Capacitors: 0. 22F, 1F, 100F, 2*1000F, 3*100pF. Operational Amplifier: Resistors: 2*100, 2*1. 0K , 3*10K , 2*100K, 470K , 2*1M. Op Amp: 1*741C op amp. Capacitors: 2* 1F. Low pass and High pass Filter: Resistors: 1. 5K, 4*8. 2K , 10K , 22K, 27K . Op Amp: 3*741C op amp. Capacitors: 4*0. 0 1F, 2*1F.
EENG400L: Electrical and Electronic
BJT and JFET Frequency Response:
- Resistors: 10 Ω, 47 Ω, 560 Ω, 1.0K Ω, 3.9K Ω, 2*10K Ω, 68K Ω.
- Transistor: 1*2N3904 npn.
- Capacitors: 0.22µF, 1µF, 100µF, 2*1000µF, 3*100pF.
Operational Amplifier:
- Resistors: 2*100Ω, 2*1.0K Ω, 3*10K Ω, 2*100KΩ, 470K Ω, 2*1MΩ.
- Op Amp: 1*741C op-amp.
- Capacitors: 2* 1µF.
Low-pass and High-pass Filter:
- Resistors: 1.5KΩ, 4*8.2K Ω, 10K Ω, 22KΩ, 27K Ω.
- Op Amp: 3*741C op-amp.
- Capacitors: 4*0.0 1µF, 2*1µF.
Colpitts and Hartley Oscillator:
- Resistors: 1.0KΩ, 2.7K Ω, 3.3K Ω, 10K Ω, 10MΩ also 100Ω potentiometer.
- Transistors: 1*2N3904 npn, 1*2N5458 n-channel JFET.
- Capacitors: 2*1000pF,0.0 1µF,3* 0.1µF.
- Inductors: 1*2µH (can be wound quickly from # 22 wire), 1*25µH.
- 1* 1MHz crystal.
Feedback Amplifier
- Transistors: 2N2219A, CD4007
- Capacitors: 0.1 uF, 2*10 uF,
- Resistors:2*10 KΩ, 100MΩ, 390 Ω, 47 KΩ,5 KΩ, 33 Ω,
Feedback - Controlled Amplifier
- Resistors: 100Ω, 270Ω, 1.0KΩ, 2.0K Ω, 47 KΩ, 100KΩ, 10K Ω also 5KΩ potentiometer.
- Transistors: 2*2N3904
- Diodes: 2*1N914.
The Phase Locked Loop:
- Resistors: 1.0KΩ, 2.0K Ω, 10K Ω also 10KΩ potentiometer.
- Transistors: 1*2N3904 npn.
- Capacitors: 1*1000pF,2200pF, 0.1µF, 1µF.
- 1*LM565 phase-locked loop
- 1*7490 decade counter
- Frequency counter
- 1* 1MHz crystal.
Frequency Response of MOS Amplifiers:
- Resistors: 2.0KΩ, 5.1K Ω, 2*10K Ω, 100KΩ.
- Transistors: VN2222LL MOSFET.
- Capacitors: 3* 10µF.
Power Amplifiers:
- Resistors: 2*22 Ω 2 W, 2*2.7KΩ, 2*10KΩ, 56 Ω, 330Ω, 3*33 KΩ, 170Ω, 4*1KΩ, 22 KΩ, 68K Ω, 5 K Ω potentiometer.
- Transistors: 1*2N3904, 1*2N3906, 2*2N2222, 1*2N2907, 2*2N3053 with heat think, 1*2SD1666, 1*2SB1133, 1*BD677.
- Diodes: 4*1N914.
- Capacitors: 0.22 µF, 47 µF, 220µF, 3* 1µF, 100µF, 2200µF, 15µF.
- Small speaker 8 or 16 Ω speaker
Linear Digital ICs
- IC; 555Timer
- Resistors: 8.2KΩ, 2 K Ω,10 K Ω potentiometer
- Capacitors: 0.01 µF, 1000pF, 1uF 2200pF
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 5
Cute
Size: 9, Color: Sand Suede
Very cute, stylish & comfortable
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Reviewed in the United States on January 22, 2026
★★★★★ 5
Really comfortable
Size: 9, Color: Sand Suede
Really comfortable
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Reviewed in the United States on May 24, 2026
★★★★★ 1
Platform too squishy, not supportive
Size: 11, Color: Sand Suede
The soles on these shoes while they feel comfortable do not provide enough support. I ended up rolling my ankle when walking across a concrete lot when I stepped on a couple of rocks. The soles were so mushy that the side of my foot just rolled out. Due to the height my ankle traveled from the platform shoe to the ground … internal damage happened.
I had to have surgery to repair the ligaments providing ankle support.
So tread carefully.
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Reviewed in the United States on February 8, 2026
★★★★★ 5
The most comfy shoes I own!
Size: 9.5, Color: Sand Suede
Do you know what I mean when I say these shoes are so ugly they are cute? They are not the prettiest shoes but boy do I love them!!! And I get tons of compliments all the time. They are sooooo comfortable! It’s like walking on cushions! They run a little big so I would suggest going down a 1/2 of size. I wear them with dresses and pants. I can wear these all day and that’s important for a 60ish year old woman! A little pricey but well worth every penny!
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Reviewed in the United States on August 11, 2025
★★★★★ 5
Love them
Size: 5.5, Color: Red Pepper
I have gotten so many compliments on these shoes! They’re true to size and comfortable. Because of the material feet might sweat easier if hot but they dry quick. Quality is great and the color looks good, it’s more of a orange/red color. I got a 5.5 size
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Reviewed in the United States on May 21, 2026