fdokumen.com_teknik-audio.ppt
- 1. Teknik Audio Oleh : DRS.YOPI SOEPRIYONO SMK Negeri 4 Jakarta
- 2. Dasar Audio Satuan Listrik Satuan Ukuran untuk Besaran Simbol Volt electrical "pressure" Tegangan V Ampere the flow of electrons Arus A, I Watt power W, P Ohm resistance to current flow R Ohm impedance, reactance X Farad capacitance F, C Henry inductance H, L Hertz frequency Hz
- 3. Tipe Penguat (Amplifier) Penguat Tegangan (Voltage Amplifier) Penguat Tegangan memperkuat Tegangan input biasa menggunakan konfigurasi Common Base Penguat Arus ( Current Amplifier ) Penguat Arus memperkuat Arus biasa menggunakan konfigurasi Common Collector Penguat Daya ( Power Amplifier ) Kombinasi dari keduanya ,mampu memperkuat arus maupun tegangan , biasa menggunakan Common Emitor
- 5. Rumus-rumus Dasar Hukum Ohm : R = V / I , V = I . R dan I = V/R Daya : P = V . I , P = I 2. R dan P = V2/R Reaktansi : Xc = 1 / (2 * * f * C) XL = (2 * * f * L) Decibell (dB) : dB = 20 * log (V1 / V2) dB = 20 * log (I1 / I2) dB = 10 * log (P1 / P2) Frekuansi Cuttoff : Fc = 1 / (2 * * R * C)
- 6. Transistor
- 11. Prategangan Transistor ( Bias ) Bias Basis ( Base bias) Bias Umpan balik kolektor ( Collector Feedback Bias ) Bias Pembagi Tegangan ( Voltage Devider Bias )
- 12. Penguat FET dan MOSFET
- 14. Push Pull amplifier 2
- 15. Push Pull amplifier 3
- 16. LOUDSPEAKER ACTIVE TV Tone Cantrol VCD Driver Catu Daya Amplifier DIAGRAM BLOK HASIL AKHIR
- 17. SKEMA LOUDSPEAKER ACTIVE 680 pF 100n 4K7 VOLUME BALANCE 1K 22K 1K TREBLE BASS 1K5 1M 2K2 10K 10K Q1 C945 10uF/25V 3n9 15n 5K6 1K 1000 uF/25 V 100n 1uF/25V 1uF/25V 470 10uF/25V 220n 1 Ohm 100n 1 Ohm 100n 22n 22n 2200uF/25V TDA 2004 IC 1 1 5 7 9 11 8 10 2 4 6 DC 12 V - 15 V LS + -
- 18. Rancangan BOX dan Panel 20 Cm 8 cm POWER VOL BAL TREBLE BASS LOUDNES HiFi 80 W ACTIVE SPEAKER 50 cm 24 cm 2 6 c m 2,5 5 cm 6 8 cm 20 cm 8 cm 19,3 cm 10,7 cm PANEL CONTROL PANEL CONTROL GAMBAR RANCANGAN BOX
- 19. Power ampli 60 Watt
- 20. 20 Watt Power Amp
- 22. Gambar rangkaian dan ICnya
- 23. 50 watt power amplifier
- 24. Ic lm 3876
- 25. OTL 40 Watt Power Amp
- 26. Catu daya non simetris untuk OTL power amplifier
- 27. OCL 50 watt
- 28. Pcb layout
- 29. OTL 35 Watt
- 30. PA Gitar
- 31. Power Ampli TDA 2005
- 33. Pre-Amp Preamp Head Tape Pick Up Mic Aux1 X C:500 pF R:47 k R:47 k R:47 k R1 810 1k 1 k 1 k R2 12 k 560 k Hub. Singkat Hub. Singkat R3 330 k 56 k 100 k 10 k C2 22 uF 47 uF 47 k 47 uF C3 - 6,8 nF - - C4 10 nF 1,5 nF 100 pF -
- 34. Tone Control
- 36. Power Amplifier
- 37. Pre Amp Head Daftar Komponen R1 = R5 = 56k C2 = C6 = 1,5nF R2 = R6 = 2,2M C3 = C7 = 22uF/10V R3 = R7 = 270 ohm C4 = C8 = 1uF/25V R4 = R8 = 330k C9 = C10 = 4,7uF/25V R9 = R10 = 100k IC = LM387
- 38. Catu Daya
- 40. Preamp Gitar
- 44. Jenis Konfigurasi Pin : Non-Inverting Amplifier : Single Op-Amp Dual Op-Amp Quad Op-Amp Inverting Amplifier :
- 45. Penguat Op-Amp Av = (Rfb1 + Rfb2) / Rfb2 Av = Rfb / RinX
- 46. Buffer Amplifier
- 47. Balaxandall Tone Control Fb0 = 1 / (2 * * C * Rv) ... where C is the cap across the pot, and Rv is the pot value Fb1 = 1 / (2 * * C * Rs) ... where C is the cap, and Rs is the series resistance to the pot These give (again, respectively) ... Fb0 = 1 / (2 * * 47nF * 100k) = 33 Hz Fb1 = 1 / (2 * * 47nF * 22k) = 154 Hz The treble is a little trickier, since there is an interaction with the bass control due to the bass feed resistance from the bass pot wiper. In theory the frequency is determined by Ft = 1 / ( 2 * * C * Rb)
- 48. Gyrator ( Simulator L) L = C1 * R1 * (R2 - R1) F = 1 / (2 * * (LC)) Hz
- 49. Schmitt Trigger Oscilator X = R3 / (R2 + R3) Fo = 1 / (2 * R1 * C1 * loge ((1 + X) / (1 - X)) Frekuensi Untuk rangkaian Oscilator di atas adalah : X = 100 / 200 = 0.5 Fo = 1 / (2 * 100k * 10nF * loge (1.5 / 0.5)) Fo = 1 / (0.002 * loge (3)) Fo = 455 Hz
- 50. Phase Shift Oscilator Fo = 6 / (2 * * C * R)