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Category: Main -> Mk. Two

 

empeg car Mk.2

The Mk.2 player was born from the necessity of improving production rates by redesigning for near-100% surface mount components and introducing an automated circuit test rig. We couldn't bring ourselves to produce a new revision without introducing some new features, and the creeping feature creature was soon at work! The new player received an improved audio stage, 10BaseT Ethernet (we couldn't do 100Mbit due to a lack of DMA), display dimming, more memory, microphone input (for future Voice Recognition support), rotary front panel control, improved docking and a stylish new look. The tuner was moved out to an external module, partly to improve isolation from the noisy processor bus and partly to facilitate future upgrades for digital radio.

Specifications

Processor

 

220MHz StrongARM S-1100-DA

Flash memory

 

1Mb

RAM

 

12Mb 60ns FPM

DSP

 

SAA7705H

DACs

 

16 bit sign-magnitude, fourfold oversampling digital filters, noise shaping

Display

 

128 x 32 dot matrix vacuum fluorescent display, 2 bits per pixel

IR

 

SIR IrDA I/O, Consumer IR input

Controls

 

4 pushbuttons, 1 rotary+push

HDD ports

 

ATA 2.5" HDD standard 2MM header

HDD physical

 

ATA 2.5" HDD up to 17mm, corner mounting screws

Serial IO

 

9-pin PC serial port, data rate to 230Kbits/s, also docked in-car

USB

 

12Mbit/s standard type B socket on head unit

Ethernet

 

10BaseT RJ45 socket on head unit

Power input

 

+12V on ISO connector fused at 2A with inline fuseholder

Grounding

 

Negative earth only

Auxillary control output

 

+12V @ 1A maximum on ISO connector

Audio outputs

 

4V line level front & rear stereo RCA line jacks, 1V stereo RCA sockets on head unit

Audio inputs

 

1V line level stereo RCA line jacks

Other features

 

On board temperature sensor
Software controlled display brightness
Display night mode input
Audio mute input (for mobile phones)

Manufacturing Pics

The empeg car was manufactured by contractors in the UK, using a state of the art automated production line. We were set to produce around 1,000 units per month with the option to increase this if necessary. In fact it was not necessary!


production floor at Hansatech, Dorset


small batch of main boards hot off the SMT line


the main board test rig - analyses over 400 signals


a partly assembled player


isolated EMC chamber in California, for FCC approval testing


ready for disks, lid and fascia

Some More Pics


our dash mockup for exhibitions


installed in our Mercedes A140 demo car


a rendered view of the player, taken from the fascia CAD

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