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Description

Some simple projects for beginners to try.

Featuring a basic discrete comparator circuit that is then used in a variety of projects including the EasyEDA ELECTRET_MIC_EE electret microphone and the LDREE, LDR (light dependent resistor, a.k.a photo resistor) symbols and their associated spice models.

Documents

Basic comparator circuit

Dark operated switch

LDR test

Light operated switch

555 monostable

Sound operated flash

Electret microphone model

Electret microphone model test jig

Electret microphone model subckt

Sound operated flash 02

Simple audio peak detector

Capacitive touch switch 01

Frequency to voltage converter

Wien Bridge Oscillator

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted
1 2DC2412R Q1,Q2,Q4 SOT23 3
2 DI_2N7002K M1,M2 2
3 9 V1,VBATT BATTERY 2
4 100k R2,R5,R6,R7,R1,R11,R16,R14,RFILT1,RREF2,R12 0603 11
5 1Meg R3,R4,R19 0603 3
6 1k LOAD,R9 0603 2
7 82k R1 0603 1
8 BC807_16 Q3,Q5 SOT23 2
9 0.5 VLIGHT_LEVEL 1
10 Ammeter A1,AFLASH 2
11 LED D1 LED3MM 1
12 22k RV1 TRIM_POT_PTH 1
13 120k R2 0603 1
14 10Meg R11,R8 0603 2
15 LDREE Rmin = 4k Rmax = 15.6Meg tc = 100m R8 DIP 1
16 50k RV1 TRIM_POT_PTH 1
17 1u C1,C2,C4,C6,C5 1206 5
18 555 U1 DIP08 1
19 10n C3,C2 1206 2
20 390 R10 0603 1
21 PULSE(0 1 10m 1m 100m 1p 1) VSOUND_LEVEL 1
22 V=V(hpf) B3 1
23 2.2k R3,R12 0603 2
24 micfet J1 TO-92 1
25 SIN(0 {SPL_PK} 1k) AC 1 0 VSPL 1
26 2 V2 BATTERY 1
27 {1/(2*pi*lf)} C2 1206 1
28 V=V(lpf) B2 1
29 1 R2,R1 0603 2
30 {1/(2*pi*hf)} C1 1206 1
31 I=V(spl)*3m B1 1
32 43p C3 1206 1
33 SIN(0 {sound_pwr} 1k) AC 1 0 VACOUSTIC_PRESSURE 1
34 ELECTRET_MIC_EE U1,U2 2
35 I=V(acoustic_input)*6.45m B1 1
36 SIN(0 {spl_pk} 1k 10m 20 ) AC 1 0 VSOUND_PRESSURE_LEVEL 1
37 100n C5,CVCC2,CVCC1 1206 3
38 10k R13,R2,RSWOUT1,ROSC2,R10 0603 5
39 470p COSC1,CCOUPLING1 1206 2
40 1N4001 D1 DO35-7 1
41 compOC5pEE U3 DIP08 1
42 1n CFILT1,C1,C7 1206 3
43 PULSE(0 1 10u 1u 1u 200u 400u) AC 1 0 VFINGER 1
44 47k RREF1 0603 1
45 PULSE(0 5 0 1u) V3 1
46 R={1G*(1-V(FINGER))+2} RFINGER 0603 1
47 SCHMITTINVEE U2,U1 DIP 2
48 SINE(0 5 1k 0 0 0 1) VSIGNAL 1
49 1N4148 D2,D3,D4 DO35-7 3
50 20k RFCAL TRIM_POT_PTH 1
51 1k R1,R2 R3 2
52 10k R3 R3 1
53 4.7k R4 R3 1
54 100u C3 1206 1
55 2N5639 J1 TO-92 1
56 1Meg R5,R6 R3 2
57 10u C5 1206 1
58 BZX84-C4V7 D2 SOD123 1
59 PULSE(0 15 0 1u) V1,V2 2P-5.0 2
60 opamp5pEE U1 DIP08 1
61 2k R4 0603 1
62 PULSE(0 9 0 10u 10u 10m 300m) AC 0 VGATE 1

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你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
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