velleman WSAH4001 7w Mono Amplifier Instruction Manual
- October 30, 2023
- Velleman
Table of Contents
Total solder points: 33
Difficulty level: beginner 12 3 4 5 advanced
7W MONO AMPLIFIER
K4001
Small but powerful multipurpose amplifier.
Specifications
Music output power : 7W/4ohm
RMS output power : 3.5W/4ohm or 2W/8ohm
Power supply : 8-18VDC/0.5A
Dimensions : 55x35mm (2.2” x 1.4”)
Features
This small amplifier is constructed around the TDA2003 IC, capable of
delivering 4Wrms at 4ohms. The IC is completely thermally and short-circuit
protected. A conventional direct current can be connected as supply.
Specifications :
Music output power : 7W/4ohm
RMS output power : 3.5W/4ohm or 2W/8ohm
Total harmonic distortion : 0.05% (1W/1KHz)
Frequency response : 20Hz-20KHz (-3dB)
Input sensitivity : 40mV/150Kohm
Signal/noise ratio : 86dB (A weighted)
Power supply : 8-18VDC/0.5A
Dimensions : 55x35mm (2.2” x 1.4”)
Assembly hints
- Assembly (Skipping this can lead to troubles !
Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully.
1.1 Make sure you have the right tools:
- A good quality soldering iron (25-40W) with a small tip.
- Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called ‘thinning’ and will protect the tip, and enables you to make good connections. When solder rolls off the tip, it needs cleaning.
- Thin raisin-core solder. Do not use any flux or grease.
- A diagonal cutter to trim excess wires. To avoid injury when cutting excess leads, hold the lead so they cannot fly towards the eyes.
- Needle nose pliers, for bending leads, or to hold components in place.
- Small blade and Phillips screwdrivers. A basic range is fine.
For some projects, a basic multi-meter is required, or might be handy
1.2 Assembly Hints :
⇒ Make sure the skill level matches your experience, to avoid disappointments.
⇒ Follow the instructions carefully. Read and understand the entire step
before you perform each operation.
⇒ Perform the assembly in the correct order as stated in this manual
⇒ Position all parts on the PCB (Printed Circuit Board) as shown on the
drawings.
⇒ Values on the circuit diagram are subject to changes.
⇒ Values in this assembly guide are correct*
⇒ Use the check-boxes to mark your progress.
⇒ Please read the included information on safety and customer service
-
Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as ‘NOTE’ on a separate leaflet.
1.3 Soldering Hints :- Mount the component against the PCB surface and carefully solder the leads
- Make sure the solder joints are cone-shaped and shiny
- Trim excess leads as close as possible to the solder joint
DO NOT BLINDLY FOLLOW THE ORDER OF THE COMPONENTS ONTO THE TAPE. ALWAYS CHECK THEIR VALUE ON THE PARTS LIST! REMOVE THEM FROM THE TAPE ONE AT A TIME !
Construction
Supply connection
Figure 1 is an example of a suitable mains supply for this circuit. Naturally, you can also use batteries to power the circuit.
Volume control
Adjust the volume by connecting a 47K logarithmic potentiometer as indicated in figure 2.0.
Connection example
Figure 3.0 is an example of a connection diagram of a 4 or 8 ohm speaker that is connected to the pins LS and GND. The input signal should be connected with the IN and GND pins.
PCB layout
Diagram
VELLEMAN NV
Legen Heirweg 33
9890 Gavere
Belgium Europe
www.velleman.be
www.velleman-kit.com
Modifications and typographical errors reserved
© Vellemannv. H4001IP – 2004 – ED1_rev.1
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>