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How to build Collection of Little Bridged Power Amplifiers

2015-01-01 14:08  
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Description

It is a little collection of amplifiers in bridge connection. The output power is low and they are for general use. They can be used with small active loudspeakers, car stereos etc. The only restriction, is that we should use loudspeakers with resistance above 4 ohm.

Circuit diagram: Bridged Amplifier 15W/4Ω

Circuit diagram

Parts list

R1-5=2.7ohmsR2=100ohmsR3-4=2.2ohmsR6=220ohmsR7=1MohmsC1-9=10uF 16VC2-8=220uF 16VC3-4-5-7=100nF 63VC6=470uF 25VIC1-2=TDA2002TR1=100Kohms trimmerLsp=4....8ohms/40W Loundspeaker

Circuit diagram: Bridged Amplifier 35W/8Ω

Circuit diagram

Parts list

R1-3-5-7-9=22KohmsR2-8=680ohmsR4-6=1ohmC1=4.7uF 16VC2-7=22uF 16VC3-6=220nF 100VC4-9=100nF 100VC5-8=200uF 25VIC1-2=TDA2030 --LM1875Lsp=8ohms/ 60W Loudspeaker

Circuit diagram: Bridge power amplifier 25W/4Ω

Circuit diagram

Parts list

R1=120KohmsR2-5-6=1KohmsR3-4=12 ohmsR7-8=1 ohmC1-5-7=220uF 25VC2-10-11=100nF 100VC3-4=2.2uF 25VC6-8=100uF 25VC9=10uF 25VIC1=LM2005M....TDA2005

Circuit diagram: Bridge power amplifier [Po=1W Sp1=4Ω Vs= 6V] [Po=4W Sp1=8Ω Vs= 12V]

Circuit diagram

Parts list

R1-2-4-5=270ohmsR3=2.7ohmsVR1=10Kohms Log. Pot.TR1=470Kohms TrimmerC1=100uF 25VC2=100nF 100VC3=10uF 25VC4-5=22uF 25VC6=47nF 100VIC1-2= LM388







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