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After supplying all your  Embedded Development Tool needs for 42 years
 Computer Solutions Ltd and its web shop are now closed.



 Having reached the grand old age of 75 it is time to relax and fulfil other ambitions.

 Its been an exciting ride with you, our customers, often on the bleeding edge of technology
 and I thank you for your friendship, your trust, and your orders.

Stay well        I wish you all success in your future projects.

Chris Stephens.



     But what to do with the web site ?  It has taken >12 man years of work to create a repository of knowledge on many aspects of the art and science of embedded microprocessor development and even after closing the shop it still gets over 4,000 visitors per month.  So as a service to my customers I have decide to keep it live providing my technical insights on the products and then redirecting viewers to sites where they can purchase the items they used to buy from us. Follow the link   "Home"

       The  "Information zone"  consists of articles produced as background tutorials on subjects of interest to those designing new products.  As different CPUs have became available this has lead to new development techniques and in particular to new ways of communicating between nodes.


Home Information Zone

An Announcement

Dear COMSOL Customer,

Having run COMSOL now for 41 years and reached the grand old age of 75 I have decided to close COMSOL for retail sales at the end of the year ( thats pre BREXIT - I can do without the excitement_) The first stage in this has been for Peak to appoint a new UK Distributor for their CAN products and this is now in place with Mark Wood's company Control Technology acting on their behalf.

 Mark Wood

Control Technologies UK Ltd

Unit 12, The Granary

Stoke Mill

Mill Road

Sharnbrook, MK44 1NN

+44(0) 1234 247 176


Control Technology are still in the process of populating their web site so you can browse our web site for technical details of Peaks product range and having identified your requirement go to their web shop or, if what you want its not there, call them for prices and availability.

Control technology will take over responsibility for Peak's UK technical support but I am working with them to smooth the transition so feel free to contact me if you wish. If any of you wish to chew the fat ( best thing about consultancy is you get all the fun of the design stage with none of the responsibility_).

Its been an exciting ride with our customers , often on the bleeding edge of technology and I thank you for your trust, orders and sometimes for your patience.


I wish you all success in your future projects.


Chris Stephens


CAN  Products

If you are new to CAN we have a brief  CAN Tutorial  that you may find informative


Peak CAN interfaces

COMSOL supply a variety of  interfaces between PCs and the CAN bus.  Manufactured by Peak-System Technik  -  all units are available with or without optical isolation and all include PCAN-Basic the free CAN software package that runs on W10, W8.1, 7, CE - ARM & x86, Linux. (32/64 bit).



The latest upgrade to the CAN standard for those who need to go faster.  Learn all about it on this page and also see Peaks latest range of CAN FD devices 

USB CAN 2.0A/B  

The favourite for its ease of use with desktops or portables. We have single channel with or without opto isolation, Dual channel and a CAN interface with an integral USB hub. 

PCI interfaces

Available for Standard/Mini/Compact and Express PCI with one or two ports per card.

PC-104 interfaces

Single and dual channel support is available for these small  PC-104 boards including Plus and Express formats. 

PC (PCMCIA)  and Express interfaces

Available with one or two ports per card and optionally including opto isolation.

ISA card interface

Available with one or two ports per card.

Parallel port - Dongle

This interface via the parallel port was Peaks original CAN product - it works in Multiplex or EPP modes.

CAN bus Diagnostics, Repeaters &  Routers

PCAN mini diag FD is a hand held bus diagnostic and fault finding unit. A Repeater will isolate sections of a CAN bus. A CAN Router will take information from one CAN bus, filter or modify it and send it to a second bus. 

Cables, converters and isolation

We can supply ready assembled high quality CAN cables, a number of isolation and converter modules as well as OBD-2, J1939 connectors and custom cabling.


Peak LIN modules

Link between CAN and LIN.  Ideal for system

 Interfaces and Gateway

Our PCAN-USB Pro interface can drive two LIN buses. A LIN gateway is also available that provides a simple LIN interface that require both LIN and CAN standards.

Peak Logo












Peak SILO modules

Peak CAN software


All Peak CAN interfaces include the PCAN-Basic package that includes drivers for W10,8.1,7,CE - ARM & x86, Linux. (32/64 bit) as well as DLLs and example programs for C++ variants, VB, Delphi, Java and Python 2.6.  They also include PCAN-View a useful Windows diagnostics application that displays and logs all messages on the bus as well as allowing manual creation of test messages.

PCAN-Explorer V5

This is a more sophisticated CAN analysis, diagnostic or automation package that turns your interface into a CAN protocol analyser.  It includes facilities to log and graph data in real time as well as to create complex test and debug sequences It can also display a mimic diagram with operator panels driven from the CAN messages. Support is also available for the full J1939 descriptors.

PCAN-FMS Toolkit

This package is specifically designed for users of the FMS truck and bus standard.  It can be used to display the FMS messages on a simulated dashboard, and log the data to disk. Alternatively data can be taken from a manual control panel, or from a pre-recorded log and sent to the CAN bus to simulate a situation. 


For multi threaded and event triggered applications this package provides a more powerful API than the PCAN-Basic package.

Other CAN software

Drivers are available to integrate the Peak range into a number of standards these include  Linux and  Labview.

CAN Open software

Drivers are available to integrate the Peak range of I/O devices into CAN Open and to monitor, control or simulate CAN Open systems.

Peak CAN modules

CAN industrial Data Acquisition Systems

A range of intelligent units that may be programmed to support a variety of CAN controller requirements from simple logging to advanced GPRS mobile applications.

Configurable CAN I/O modules

A selection of CAN I/O modules that can be simply and quickly re-configured to meet the majority of Data collection tasks including reading from RS232 devices and reporting GPS location.


This simple board can be used for a variety of I/O tasks. 8 digital in, 8 out, 8 *10 bit analogue inputs and 4 PWM outputs all configurable via an on board micro and the CAN bus. Size = 32*36mm.  An evaluation board makes it an ideal learning tool. 




Home Information Zone
Computer Solutions Ltd
87 Briar Road,  Shepperton,  Middx,  TW17 0JB
Telephone: +44 (0) 77 4342 2526   
Email:      Web:
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