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Update time：
2021-10-10 21:01:34
Creation time：
2014-01-14 11:04:03
Description
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.
Design Drawing
Design Drawing
schematic diagram
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Basic comparator circuit
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Dark operated switch
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LDR test
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Light operated switch
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555 monostable
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Sound operated flash
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Electret microphone model
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Electret microphone model test jig
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Electret microphone model subckt
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Sound operated flash 02
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Simple audio peak detector
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Capacitive touch switch 01
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Frequency to voltage converter
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Wien Bridge Oscillator
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PCB
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| ID | Designator | Quantity |
|---|---|---|
| 1 | AFLASH,A1 | 2 |
| 2 | C1 | 1 |
| 3 | C2,C4,C1,C5,C6 | 5 |
| 4 | C3,C2 | 2 |
| 5 | C5,C2,CVCC1,CVCC2 | 4 |
| 6 | D5,D6,D7 | 3 |
| 7 | M1,M2 | 2 |
| 8 | Q1,Q2,Q4 | 3 |
| 9 | Q3,Q5,Q2 | 3 |
| 10 | R1,R5,R6,R7,R11,R14,R16,R2,R3,RFILT1,RREF2,R12 | 12 |
| 11 | R3,R4,R19,R5 | 4 |
| 12 | R8,R11 | 2 |
| 13 | R9,LOAD | 2 |
| 14 | R10 | 1 |
| 15 | R12,R3,R1 | 3 |
| 16 | R13,R4,R2,ROSC2,RSWOUT1,R10 | 6 |
| 17 | RV3,RV1 | 2 |
| 18 | U1 | 1 |
| 19 | U2,U1 | 2 |
| 20 | V1,VBATT | 2 |
| 21 | VSOUND_PRESSURE_LEVEL | 1 |
| 22 | LDR1,R8 | 2 |
| 23 | R1,R2 | 2 |
| 24 | RV4,RV5 | 2 |
| 25 | VLIGHT_LEVEL | 1 |
| 26 | R4 | 1 |
| 27 | U5 | 1 |
| 28 | VGATE | 1 |
| 29 | B1 | 1 |
| 30 | B2 | 1 |
| 31 | B3 | 1 |
| 32 | C1 | 1 |
| 33 | C2 | 1 |
| 34 | J1 | 1 |
| 35 | R1,R2 | 2 |
| 36 | B1 | 1 |
| 37 | C3 | 1 |
| 38 | V2 | 1 |
| 39 | VSPL | 1 |
| 40 | VACOUSTIC_PRESSURE | 1 |
| 41 | RV2 | 1 |
| 42 | VACOUSTIC_PRESSURE | 1 |
| 43 | VSOUND_LEVEL | 1 |
| 44 | B4 | 1 |
| 45 | R1 | 1 |
| 46 | U4 | 1 |
| 47 | V2,VLIGHT_LEVEL | 2 |
| 48 | R1 | 1 |
| 49 | VCTRL1 | 1 |
| 50 | CCOUPLING1,COSC1 | 2 |
| 51 | CFILT1,C1,C7 | 3 |
| 52 | D1 | 1 |
| 53 | RFINGER | 1 |
| 54 | RREF1 | 1 |
| 55 | U1,U2 | 2 |
| 56 | U3 | 1 |
| 57 | V3 | 1 |
| 58 | V4 | 1 |
| 59 | VFINGER | 1 |
| 60 | D2,D3,D4 | 3 |
| 61 | RFCAL | 1 |
| 62 | VSIGNAL | 1 |
| 63 | C3 | 1 |
| 64 | C5 | 1 |
| 65 | D2 | 1 |
| 66 | J1 | 1 |
| 67 | R1,R2 | 2 |
| 68 | R3 | 1 |
| 69 | R4 | 1 |
| 70 | R5,R6 | 2 |
| 71 | U1 | 1 |
| 72 | V1,V2 | 2 |
| 73 | C101,C102 | 2 |
| 74 | H1 | 1 |
| 75 | MIC101 | 1 |
| 76 | Q101 | 1 |
| 77 | R101 | 1 |
| 78 | R102 | 1 |
| 79 | R103 | 1 |
| 80 | R104 | 1 |
| 81 | R105 | 1 |
| 82 | V1 | 1 |
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