|
|
| Line 5: |
Line 5: |
| File:Lm386_mic_amp1.png | Schematic 2 | | File:Lm386_mic_amp1.png | Schematic 2 |
| </gallery> | | </gallery> |
| {| class="wikitable sortable"
| |
| |-
| |
| ! Gain !! C1 !! R1 !! R4
| |
| |-
| |
| | 20x, 14x, 10x || - || - || 2k, 5k, 10k
| |
| |-
| |
| | 20x || - || -
| |
| |-
| |
| | 50x || 10UF || 1.2K
| |
| |-
| |
| | 200x || 10UF || -
| |
| |}
| |
| * Amplification is controlled by R2 in schematic 2
| |
| # C1 1~10uF Bypass capacitor
| |
| # C2 10uF Gain 200x. Optional, without 10uf is 20x gain.
| |
| # C3 220uF Output coupling capacitor
| |
| # C4 47nF Boucherot cell
| |
| # C5 100nF Power supply decoupling
| |
| # C6 100uF Power supply decoupling
| |
| # C7 10uF Microphone coupling capacitor
| |
| # MIC Electret microphone
| |
| # R1 10R Boucherot cell
| |
| # R2 1 ~ 10K Microphone load resistor
| |
| # VSS 4 ~ 12V Supply voltage
| |
|
| |
|
| [[category: Audio Amp]] | | [[category: Audio Amp]] |
