Total solder points: 123 Difficulty level: beginner 1 2 3 4 5 advanced AUDIO ANALYZER K8098 ra audio gea Give your .
Features & Specifications Features Specifications measure: peak power (fig.1) RMS power (fig.2) mean dB (fig.3) peak dB (fig.4) linear audio spectrum (fig.5) 1/3 octave audio spectrum (fig.6) auto or manual range selection peak-hold function speaker impedance selection language selection white backlit LCD easy panel mounting 2 power measurement into 2, 4 or 8 ohms + bridged amp option range: 300mW to 1200W @ 2 ohms sensitivity: -34dBu (15.5 mVrms) max.
Assembly hints 1. 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.
Assembly hints 1.3 Soldering Hints : 1- Mount the component against the PCB surface and carefully solder the leads 2- Make sure the solder joints are cone-shaped and shiny 3- Trim excess leads as close as possible to the solder joint REMOVE THEM FROM THE TAPE ONE AT A TIME ! DO NOT BLINDLY FOLLOW THE ORDER OF THE COMPONENTS ONTO THE TAPE.
Construction The audio analyzer consist of three parts: the basic module, the display module and the front panel. If required you can mount this kit into a housing, panel, ... In this case use the display gap as a marker reference. First we assemble the basic module. 1. Jumper wire J1 ... J6 2. Horizontal resistors R...
construction 6. Voltage regulator VR1: LM317 9. Electrolytic Capacitor. Watch the polarity ! 8. Pin header 9x 1 C4, C5 : 10µF C6, C7 : 220µF C8, C14 : 4,7µF 9x C... 2 10. Board-to-wire connector (a) 7. Capacitors. SK1 (b) 11. Push button C1…C3 C9 C10 C11 : : : : 100nF 4.
Construction 12. IC. Watch the position of the notch! 13.
LCD 14. Assembly 1.Roughen the 4 bolts with a knife, a file or some abrasive paper so it will be easier to solder them to the front panel. 2. Assemble the unit but do not yet tighten the bolts (fig.1). Fig.1 3. Position the unit onto the rear of the front panel with the display is centred in the cut-away. Temporarily fix the unit to the rear using non-permanent tape (fig. 2). Fig.
LCD 4. Solder 2 diagonal bolts to the front panel. Check if the display is still centred in the cut-away. Solder the remaining 2 bolts (fig. 3). Solder Fig.3 5. Now, fix the whole unit using the 4 nuts and remove the tape.
Connection examples 15. CONNECTION Ex.
Connection examples Ex. connected to speaker output Ex. connected to LINE OUT Yellow Amplifier, ex.
Use 16. USE Short press on the 'mode' button: selecting a meter-display. Long press on the 'mode' button: opening the set-up menu. Set-up menu Access to the Set-up menu by a "long" push on the 'mode' button. Short press: changing settings long press: next function Keep pressed: save changes and exit Speed: refreshing the screen (Fast - Mid - Slow) Impedance: "2", "4" or "8" ohms for speaker output power calculation, in case the unit is connected to speaker output.
Advanced settings Advanced settings First open the set-up menu with a long press on the 'mode' button and choose the mode "advanced settings". Short press: changing settings long press: next function Keep pressed: save changes and exit Language: UK / NL / FR / DE / ES Contrast : choose a contrast between 1 - 20 Reverse video: normal or reverse display True mean: Yes or no. If 'no' is selected then the display gives the integrated "peak values". If a pure sine wave is used both values will be the same.
Schematic diagram 17.
PCB 18.
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