This simple but powerful bass, treble, volume control is made by General Op-Amp IC LM741. The input voltage is 12V, but it will also work with 9V and 6V. This has inbuilt pre-amplifier also.
Left channel is shown. Right channel is same.
Parts List:
- IC LM741 x1 10/-
- T/C 10k,22k,100k All x1 27/-
- Triansistor BC148/548 x1 1/-
- 220uF/25V x2 6/-
- 4.7uF/25V x2 4/-
- 2.2uF/10V x1 2/-
- 10uF/25V x1 2/-
- Small resistances x12p 2/-
- Small PF x5p 2/-
TOTAL 56/-
hi, and wath about the resistence between bass and treeeble pots??tanks.
while using bt i have getting some humming noise
You need decoupling. Use 104 (0.1uF) capacitors between +ve and GND near the LM741 IC. Also make connections as short as possibler and use best quality capacitors.
Hi There,
Could you please check the electrolytic capacitors values on the schematic, they're written in nf. This got me confused
Thanks
The values should be mfd or microFarad as stated in the article. Thanks.
Hi Again,
Isn't BC148 an npn ?
Thanks for pointing out the errors. Please re-download the diagram.
sir im a begener in this field but i want to make my own ampllifier can you please send me some simple audio circuit which i can easyly make,please send me without IC circuit.
Please learn audio basics by visiting http://www.bcae1.com
To powering the circuit 12v what amp transformer i use?
12V 100mA is even enough.
can i use 12v 100 ma smps circuit or please tell me what is the code no
of .04 uf
0.04uF means 40Kpf or 40nf. The closest you can get easily is 39kpf which is marked in capacitors as 393.
so with this i can just plug it to my musicplayer and it will boost the bass and treble? if so how big should the speaker resistance be and how much load can it take?
Speaker specs depends on your power amplifier and not this one. This just does tuning of sound.
The description says 'with inbuilt pre-amplifier'. What exactly do u want me to give as input to the circuit ?
I meant that you can give input from microphones also directly to this without using any other pre-amplifier.
how t o give an input to this ckt.???we can just connect this ckt to our mobile as a earphone and then it wil give the ouput song on speaker.????and at output we just have to connect an speaker only na????
what are the possible replacement for 0.04 uf ceramic capacitor?
Arup,
I came across this site from a post I did on reddit.com.
I think your amplifier design is what I need to complete my audio amplifier project. I want hook up my ipod thru Aux port and have a cool speaker system. I plan on taking your notes to Radio Shack for supplies. Can you tell me where I can purchase this circuit board? I see 12v power but how much amperage does it take?
hi, what is the orientation of the transistor b 548 in the board as to its Base Collector and Emitter? Thanks
Thanks
this will work on one channel . so, will u plz tell me how can i make one control for both channels means on one bass knob both left and right channel
what happned if i connect both left and right input to same in put in circuit