eee/XP

from: http://wiki.eeeuser.com/windowsxp

Monacor

TECHNICAL DATA:
Impedance (Z) 4Ω
Frequency range 48-4,000Hz
Resonant frequency (fs) 37Hz
Crossover frequency (12dB/oct.) (fmax) 2,500Hz
Peak rating 200W
Power rating 75WRMS
SPL (1W/1m) 91dB
Cms suspension compliance 0.95mm/N
Mms moving mass 19g
Qms mech. Q factor 3.64
Qes electrical Q factor 0.58
Qts total Q factor 0.5
Compl. equiv. vol. (Vas) 61 l
DC resistance (Re) 3.8Ω
Voice coil ind. (1kHz) (Le) 0.3mH
Voice coil diameter 25mm
Voice coil former aluminium
Air gap height 4mm
Force factor WxL 5.51Tm
Eff. cone area (Sd) 214cm2
Magnet diameter 100mm
Magnet weight 570g
Mounting cutout Ø 182mm
Mounting depth 90mm
Dimensions Ø 202mm
Weight 1.25kg

http://monacor.co.uk/products/carfi-loudspeaker/vnr/102800/




TECHNICAL DATA:
Impedance (Z) 4Ω
Frequency range 40-3,500Hz
Resonant frequency (fs) 35Hz
Crossover frequency (12dB/oct.) (fmax) 2,000Hz
Peak rating 350W
Power rating 100WRMS
SPL (1W/1m) 93dB
Cms suspension compliance 0.55mm/N
Mms moving mass 38g
Qms mech. Q factor 3.15
Qes electrical Q factor 0.47
Qts total Q factor 0.41
Compl. equiv. vol. (Vas) 96 l
DC resistance (Re) 3.7Ω
Voice coil ind. (1kHz) (Le) 0.4mH
Voice coil diameter 39mm
Voice coil former aluminium
Air gap height 5mm
Force factor WxL 8.08Tm
Eff. cone area (Sd) 353cm2
Magnet diameter 125mm
Magnet weight 850g
Mounting cutout Ø 231mm
Mounting depth 110mm
Dimensions Ø 255mm
Weight 2.1kg

http://monacor.co.uk/products/carfi-loudspeaker/vnr/102810/

ebay car amp

400W 4-Channel output power Amplifier;
U disk SD/MMC card can be played for music and FM stereo radio and this item Supports MP3 music format; (USB+SD+MMC+FM)
Four Channel, integrated circuits, minimal distortion and strong power;
2 main channels and 2 surround channel output
Filtering and anti-capacity power circuit;
DSP sound field pattern of the four;

specification:
Frequency response: 20Hz- 20KHz
Output power: RMS 41W 1KHz
PMPO power: 400w.
Harmonic distortion:≤ 0.05% 4W 1KHz
SNR:=85dB
High control: 12dB±10KHz
Bass control: 12dB±100Hz
Signal level: 220MV 47K
Reader, u-disk format: MP3, FM
FM frequency range: 87.5MHz-108MHz
Load impedance:4-16 ohms
Dimension: 190*170*60 mm
(A remote for ampplifier is included.)
(12V DC power adaptor is not included in the package.)

Risa Uke

Size 18.3“ x 4.3“ x 1.2” (46.5 cm x 11 cm x 3 cm)
Scale length 14.2” (363.5 mm)
Tuning G-C-E-A or A-D-F#-B
Strings RISA Fluoro-Carbon
Finish Satin clear coat
Frets 14
Neck Maple, width 1.38“ (35 mm) at zero fret
Solid maple body
Fingerboard One-piece (neck, body, fingerboard)
Pickup Passive Shadow Piezo
Tuners 1:4, Banjo style
Weight 14 ounces 380 g

OTHER:

MANDOLINS
scale length: 13 7/8"
width of nut: 1 5/32"
width at 12th: 1 15/32"
strings, outside to outside, at bridge: 1 19/32"
highest fret: 21
depth of neck at 1st fret: 13/16"
depth of neck at 8th fret: 15/16"
length of peghead: 7 1/2"
depth of sides only: 1 9/16"
width of lower bout: 10 1/32"
length of body: almost 14" with scroll
max height of arch, top: usually 3/8"+*
height of bridge: 13/16"
max height of arch, back: usually 1/2"+
soundhole dimensions: 4 9/16" long
hypothetical bridge point to tail: 6 3/8"

from http://smart-instruments.com/gal95.html

constant current source

http://talkingelectronics.com/projects/200TrCcts/200TrCcts.html

TDA7052 w DC vol control

http://freecircuitdiagram.com/2010/10/09/btl-mono-amplifier-with-dc-volume-control/



This is BTL (bridged tied load) mono amplifier with DC volume Control circuit. This circuit uses TDA7052A/AT that is suitable not only for monitors and TV but also battery fed portable radios and recorders. The difference between conventional DC volume circuits and TDA7052A/AT the DC volume control is there is no coupling capacitor is needed in TDA7052A/AT the DC volume control to maintain the low offset voltage. Besides that, the TDA7052A/AT the DC volume control require low supply. The advantages of BTL principle are it has the ripple’s frequency on the supply voltage is twice the signal frequency and the supply current peak is lower.

3.6v charging

http://electronicsprojects.mediadir.in/nicd-battery-charger-with-reverse-polarity-protection/

Small and portable unit, Can charge multiple batteries at once

This NiCd battery Charger can charge up to 7 NiCd batteries connected in series. This number can be increased if the power supply is increased with 1.65V for each supplementary battery. If Q2 is mounted on a proper heatsink, the input voltage can be increased at a maximum of 25V. Unlike most of comercial NiCd chargers available on the market, this charger has a reverse polarity protection. Another great quality is that it does not discharge the battery if the charger is disconnected from the power supply.

Usually , NiCd batteries must be charged in 14 hours at a charging current equal with a tenth percent from battery capacity. For example, a 500 mAh is charged at 50 mA for 14 hours. If the charging current is too high this will damage the battery. The level of charging current is controlled with P1 between 0 mA – 1000 mA. Q1 is opened when the NiCd battery is connected with the right polarity or if the output terminals are empty. Q2 must be mounted on a heatsink. If you cannot obtain a BD679, then replace it with any NPN medium power Darlington transistor having the output parameters at 30V and 2A. By lowering R3 value the maximum output current can be increased up to 1A.

P1 = 1K
R1 = 680R
R2 = 47K
R3 = 1R-3W
Q1 = BC557
Q2 = BD679 (Darlington)
D1-D5 = 1N4148
D6 = 1N4001