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6 years ago 4502
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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 Designator Quantity
1 Q1,Q2,Q4,Q1,Q2,Q1,Q2,Q1,Q2,Q1,Q1,Q2,Q1,Q2 14
2 M1,M2,M1,M1,M1,M1,M1,M2,M1 9
3 V1,V1,V1,V1,V1,VBATT,V1,V1 8
4 R3,R4,R19,R3,R4,R3,R4,R3,R4,R5,R3,R4,R3,R4 14
5 R5,R7,R6,R11,R16,R1,R14,R5,R7,R6,R2,R2,R5,R6,R7,R5,R6,R7,R1,R2,R3,R1,R5,R7,R6,R2,R1,R11,RREF2,RFILT1,R5,R7,R6,R2,R1,R11,R12 37
6 Q3,Q5,Q3,Q3,Q3,Q2,Q3,Q3 8
7 R9,LOAD,LOAD,R9,R9,R9 6
8 R8,R8,R11,R8,R8 5
9 C1 1
10 C2,C4,C1,C1,C4,C1,C2,C2,C4,C6,C5,C1,C2,C4 14
11 U1,U1,U1,U1 4
12 C3,C2,C3,C3 4
13 R10,R10 2
14 AFLASH,A1,A1,AFLASH 4
15 R12,R3,R1,R3 4
16 VSOUND_PRESSURE_LEVEL 1
17 U2,U2,U1 3
18 C5,C2,CVCC1,CVCC2 4
19 R13,R4,R2,ROSC2,RSWOUT1,R10,R13 7
20 VLIGHT_LEVEL,VLIGHT_LEVEL 2
21 LDR1 1
22 R1,R2 2
23 R1 1
24 B3,B3 2
25 J1,J1 2
26 VSPL 1
27 V2,V2 2
28 C2,C2 2
29 B2,B2 2
30 R2,R1,R2,R1 4
31 C1,C1 2
32 B1 1
33 C3 1
34 R8 1
35 VACOUSTIC_PRESSURE 1
36 R4 1
37 VGATE 1
38 B1 1
39 VACOUSTIC_PRESSURE 1
40 V2,VLIGHT_LEVEL 2
41 R1 1
42 VSOUND_LEVEL 1
43 COSC1,CCOUPLING1 2
44 D1,D1 2
45 VFINGER 1
46 RREF1 1
47 V3 1
48 U2,U1 2
49 CFILT1,C1,C7 3
50 U3 1
51 RFINGER 1
52 V4 1
53 VSIGNAL 1
54 D2,D3,D4 3
55 R1,R2 2
56 R3 1
57 R4 1
58 C3 1
59 J1 1
60 R5,R6 2
61 C5 1
62 D2 1
63 V1,V2 2
64 U1 1
65 B4 1
66 RV3,RV1 2
67 RV4,RV5 2
68 RV2 1
69 RFCAL 1
70 VCTRL1 1
71 D5,D6,D7 3
72 U4 1

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