Stereo preamplifier circuit based on the Integrated Circuit TDA1524A. Contains components for amplification and pre Tone controlling. The signal processing is done by the voltage controlled TDA1524A. This manufactured by Philips IC (NXP) Semiconductors, allows for tone control voltage and can be used in more complex designs using microcontrollers. Here we use linear potentiometers to control tone, volume and balance. The circuit is completed with the source and the suggestion of the printed circuit board, to facilitate assembly. Ideal circuit to be complemented by the power amplifier circuit posted here on the blog.
Description of pre tonal circuit with IC TDA1524A Stereo – With adjustment Bass, Treble, Balance, Volume and Loudness
The circuit TDA 1524 has a 20DB gain and control tone +-15dB, if you prefer to mount it in a DIP socket 18 to facilitate maintenance.
The power supply uses a transformer 12V/250mA to regulate the voltage at 12 volts using a IC 7812T (any prefix). If using on a project that already has amplifier and a power supply, you can omit the transformer, diodes and replace by the 4700μF capacitor by a 470 or 1000μF . The LED used to indicate the active state of the circuit can also be omitted if you prefer.
S1 in the connector is to be connected to key loudness, and works well with the key turned to the R2 circuit is disabled, if you want to use this feature, simply connect a jumper in place so that the resistor R2 (2.2K) stay connected to the circuit.
Schematic of the preamplifier with tone control and Volume
Suggested of the printed circuit board for the preamp with IC TDA1524 – Bass, Treble, Balance and Volume
List of components for assembly circuit TDA1524A tone control with Bass and Treble
| Parts | Value |
| Resistor’s 1/4 Watt 5% | |
| R1 | 1.2K – Brown, Red, Red, Gold |
| R2 | 2.2K – Red, Red, Red, Gold |
| R3, R4 | 4.7K – Yellow, Violet, Red, Gold |
| R5, R6 | 220 – Red, Red, brown, gold |
| Capacitors | |
| C1 | 4700µF/35V – Electrolytic Capacitor |
| C2, C4, C5, C6, C7, C8, C20 | 100nF – Polyester Capacitor |
| C3, C13, C14, C15, C16 | 10µF/25V – Electrolytic Capacitor |
| C9, C17 | 47nF – Polyester Capacitor |
| C10,C18 | 15nF – Polyester Capacitor |
| C11, C12 | 10nF – Polyester Capacitor |
| C19 | 100µF/25V – Electrolytic Capacitor |
| Semiconductors | |
| D1, D2, D3, D4 | 1N4004 or equivalent – rectifier diode |
| IC1 | 7812T – Positive voltage regulator 15 Volts |
| IC2 | TDA1524A – Integrated circuit with volume and tone control Philips (NXP) Semiconductors |
| LED | Red LED |
| Miscellaneous | |
| IN | Input Connector Stereo Audio |
| AC | Connector to the transformer |
| OUT | Connector for Stereo Audio Output |
| J1 | J12MM – Jumper 12 mm piece of wire. |
| Trafo | Transformer 12 Volt |
| P1, P2, P3, P4 | 50K or 47K Linear Pot- |
| S1 | Switch for Loudness |
| Welding, Wire, Cash for housing circuit, printed circuit board, the IC socket, fuse, etc.. | |
Download PDF files for this project: PCB, Silk, Layout, Layout components, Datasheet TDA1524A, TDA1524A Eagle Library.
Buy TDA1524A IC from Aliexpress
How to make Switch for loudness
Volts of all polyester capacitor that you used to this amplifier? ASAP…
Hi Kenj
50V or greater
Alternatives for 100nf, 15nf, 47nf, and 10nf polyester capacitor? Begging, I’m in hurry, please?
Hi Kenj
100nF = 104 or 0.1
15nF = 153 or 0.015
47nF = 473 or 0.047
10nF = 103 or 0.01
If you do not find polyester, try with ceramic capacitors
Great Man You Are a Great person These pcbs Very Clear and Super I Wish You All The Best
Please give the pcb size
size pcb 8.2cm x 9.1cm
Great job please tell me PCB print size because i am trying it
hai, I want to know how must the price for pcb preamp ic tda 1524a?
How many use the current this circuit.
Plz tell me
I found this circuit in other site!
How many watts is that amplifier?
This is exactly the kit I was looking for.
I used a stereo transmitter out of a second hand
Sennheiser cordless headset and the receiver out of the headset in a small plastic cabinet included a 2 x 5 watt
amp and 2 coomunication-speakers for my almost deff
father. Now he can hear the television without problems
with our neighbours. He sits in between the speakers.
But I had to make a volume control connected by a cable
of about 4 meters. A voltage-controlled pre-amp is then
the solution to avoid hum.
But where to buy the kit???
I already downloaded the layouts ans I have the parts here.
But I am not able to make the print.Who can and will help me . Just the print will do. I can drill the holes.
I saw an shop in South Africa but the charce 40 dollar ans 9 for postage. Here in holland is no shop who sells the kit
even not in Germany. Please help me.
Cor den Hollander
Rotterdam Holland
PCB size ???
9.1cm x 8.2cm size pcb bro
pcb size???
dimensiunea la pcb cat este?
please send it project if you have project. email: mr.hienhauidt2@gmail.com
link down die.
please send it project if you have project. link down die
:mr.hienhauidt2@gmail.com
can this pre-amplifier circuit will work with LM3886 amplifier. Plz check this link and suggest me.Please send your suggestion on my email: surya0562@rediffmail.com
http://www.eeweb.com/project/circuit_projects/lm3886-gainclone-2×68-watt-full-amplifier-project
i want this board immedietly
you must connect the output of tda 1524 to your input of your amplifier
works great! thanks.
i test this circuit and it works perfectly
Where can i get this complete kit.
Hi,
may i connect this pre amp with the amplifier blow. If yes how can i connect?????????
http://xtronic.org/circuit/amplifier/circuit-audio-amplifier-potency-tda2003/#ixzz3HAE3E1f3
is it tested??