3 Band Stereo Tone Control.

Components:-

1. 1×4558D IC

2. 1×L7812/L7815 ic.

3. 1×L7912/L7915 ic.

4. 2×1000uf 25V capacitor.

5. 2×2.2uf 50V capacitor.

6. 4×470pF 50V capacitor.

7. 2×472pF 50V capacitor.

8. 2×104pF 50V capacitor.

9. 2×1k resistor.

10. 4×2.7k resistor.

11. 2×100k resistor.

12. 2×220k resistor.

13. 1×680Ω resistor.

14. 4×47k dual gang potentiometer.

15. 4×1N4007 diode.

Watch this video for better understanding

License► ©Technical Mriganka. You can't use this pcb layout for commercial purpose. You can use this pcb layout only for educational and diy projects.

PCB LAYOUT► https://drive.google.com/file/d/13BfftBNWNXaibAG65pVSNd_wp0JSevyZ/view?usp=drivesdk

Note► print this pcb layout on A4 paper, you get same size. For ironing mathod, print this pcb layout by Laser printer. if you use inkjeter or inktank printer, it will not work.

In this post I make a 3 band stereo tone control using 4558D ic you can use here TL072, TL082, NE5532 ic. Frequency response 20hz - 20khz. For power supply you can use 12-0-12V 500mA transformer. Now follow my steps for this tone control. First we make pcb. For make pcb you need pcb layout. download the pcb layout and print it by laser printer on photo paper. Then cut the pcb layout. Then press the pcb layout by iron on copper clad board. Press the iron 10-15 minutes. Then leave the pcb for cool down 10 minutes. when the pcb was cool, put the pcb in water and move the pcb layout to copper clad board. Then put the pcb in ferric chloride [FeCl3+H2O] for etching 10-15 munites. when etching was end, clean the pcb by water. Then make hole on pcb. And then press the upper side print of pcb. Now your pcb is ready mount components by instruction.

After complete this board don't forget to series light test.

Then check input and output voltages by multimeter. Make sure the input and output voltages are 0.0 volt.

If voltages out from input and output, don't connect this board with preamplifier and Amplifier. Check this board carefully. Find out problem and solve that.

Thank you.