Whadda WSAH8098 User manual
ILLUSTRATED ASSEMBLY MANUAL
EN AUDIO ANALYZER
whadda.com
WSAH8098
2
Fig.1 Fig.2 Fig.3 Fig.4
Fig.5 Fig.6 reversed
Features
-measure:
»peak power (g.1)
»RMS power (g.2)
»mean dB (g.3)
»peak dB (g.4)
»linear audio spectrum (g.5)
»1/3 octave audio spectrum (g.6)
-auto or manual range selection
-peak-hold function
-speaker impedance selection
-language selection
-white backlit LCD
-easy panel mounting
Specications
-power measurement into 2, 4 or 8 ohms + bridged amp
option
-range: 300mW to 1200W @ 2 ohms
-sensitivity: -34dBu (15.5 mVrms)
-max. input level: 50Vrms @ 220k
-frequency range: 20Hz to 20kHz
-power supply: 12VDC / 75mA
-dimensions:
»display: 128 x 64pixels (46 x 23mm / 1.8 x 0.90”)
»front panel: 98 x 51mm / 3.8 x 2”
»mounting depth: 35mm / 1.37”
- 3 -
DO NOT BLINDLY FOLLOW THE ORDER OF THE
COMPONENTS ONTO THE TAPE. ALWAYS CHECK THEIR
VALUE ON THE PARTS LIST!
4
DIGITS Multiplier Tolerance
1st 2nd 3rd stripe 4th stripe
Black 0 0 0 x 1
Brown 1 1 1 x 10 1%
Red 2 2 2 x 100
Orange 3 3 3 x 1 000
Yellow 4 4 4 x 10 000
Green 5 5 5 x 100 000
Blue 6 6 6 x 1 000 000
Purple 7 7 7 -
Grey 8 8 8 -
White 9 9 9 -
Gold - - - x 0.1 5%
Silver - - - x 0.01 10%
RESISTOR COLOR CODE
10K OHM
+/- 1%
1st digit
2nd digit
3rd digit
multiplier
tolerance
100K OHM
+/- 5%
1st digit
2nd digit
multiplier
tolerance
0.6 W
5
Construction
R1 : 470 (4 - 7 - 1 - B)
R2 : 1K (1 - 0 - 2 - B)
R3 : 1K (1 - 0 - 2 - B)
R4 : 220K (2 - 2 - 4 - B)
R...
R...
R...
Basic module
D1 : 1N4007
Watch the
polarity!
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
2 Resistors
J1
J2
J3
J4
J5
J6
R5 : 33K (3 - 3 - 3 - B)
R6 : 33K (3 - 3 - 3 - B)
R7 : 22K (2 - 2 - 3 - B)
R8 : 750 (7 - 5 - 1 - B)
R9 : 180K (1 - 8 - 4 - B)
R10 : 2K2 (2 - 2 - 2 - B)
R11 : 6K8 (6 - 8 - 2 - B)
R12 : 6K8 (6 - 8 - 2 - B)
R13 : 680 (6 - 8 - 1 - B)
R14 : 3K3 (3 - 3 - 2 - B)
R15 : 750 (7 - 5 - 1 - B)
R16 : 5K6 (5 - 6 - 2 - B)
R17 : 220 (2 - 2 - 1 - B)
R18 : 22K (2 - 2 - 3 - B)
3 Diode
4 IC-socket
Watch the position of the
notch!
IC1 : 8p
IC2 : 28p
5 Coil
L . . .
L1 : 4700µH (4 - 7 - 2 - B)
L . . .
L . . .
Construction
6
Construction
VR1 : LM317
6 Voltage regulator
7 Ceramic Capacitors
C1 : 100nF (104)
C2 : 100nF (104)
C3 : 100nF (104)
C...
C...
C12,C13 & X1 are not mounted !
8 Pin header
1
C9 : 4.7nF (472)
C10 : 470pF (471)
C11 : 47pF (47)
2
(a)
(b)
3
Solderside
7
Construction
Watch the position of the notch!
9 Electrolytic Capacitor
10 Board-to-wire connector
Watch the polarity!
C4 : 10µF
C5 : 10µF
C6 : 220µF
C7 : 220µF
C8 : 4,7µF
C14 : 4,7µF
SK1
11 Push button
SW1
Mount the button on the
solderside!
12 IC’s
IC1 : MCP6002-E/P
IC1 : VKVPA20
(programmed DSPIC33FJ32I/SP)
8
1 Capacitors
2 Male header
3 LCD
C1 : 1µF
C2 : 1µF
C3 : 1µF
C4 : 1µF
C5 : 1µF
C6 : 1µF
C7 : 1µF
C8 : 1µF
C9 : 1µF
C10 : 1µF
Be careful when solder-
ing the LCD connections.
Overheating will damage the
LCD screen.
!
Construction
Display module
Mount the female
connector on the
component side,
solder on the display
side !
Follow these steps for correct soldering
SMD components.
9
Assembly
1. Roughen the 4 bolts with a knife, a le 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 ( g.1).
3. Position the unit onto the rear of the front panel with the display is centred in the cut-away.
Temporarily x the unit to the rear using non-permanent tape ( g. 2
Assembly
10
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 ( g. 3).
5. Now, x the whole unit using the 4 nuts and remove the tape.
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