www.tonas.dk - home of the MultiClass (Koster) timer

I'm the designer of the MultiClass timer, also known as the Køster timer or the Danish timer. My goal is to provide the worlds most reliable solutions for Free Flight models.

The MultiClass timer is a product of many years of experience done by Thomas Køster, Henning Nyhegn and myself. It holds protection against all the potential problems that we are aware of and I'm happy to say that the electronics has never failed yet as far as I know.

As an extra security the timer allows radio controlled DT.

If electronic timers are new to you, I'll suggest you read Cenny Breeman's article on electronic bunters, published in Free Flight news, April 1998

New: Palm interface and application:

With this new Palm interface called cbox i/f, you can now program your timers using a palm handheld. The Palm application called "cbox" is simply the Control Box software ported to Palm.

The palm application can be downloaded here Palm cbox application. UPDATED 2003-04-

Currently the cbox application is tested with Palm m515, m100 and Palm Pro. If you test it with different models, please let me know if it works. I will do my best to make it work with all newer models (OS 2.0 and up) except the Zire. Zire does not support the serial hotsync port that is used by the cbox application.

The cbox i/f is available now at a price of 300DKK (excl. VAT). VAT is only added if you live in EU and even there is exceptions. Send a mail for more information's.

To connect the Palm handheld to the cbox i/f, you'll also need a Palm serial hotsync cable.

F1A / F1C timer 2.0:

- Operates on 4.8V supply from 4 rechargeable NiMH cells.

- Controls 3 servos.

- Current consumption in active mode: 8,5mA at 4,8V including 3 servos.

- Current consumption in idle mode: 0,25mA.

- Mercury switch option.

- Upgradable software. New features will be available upon request.

- RC DT option.

- Hall element or micro switch triggers.

- Buzzer output.

- Very flexible mechanical design of faceplate including direct position control.

- Direct drive of servo motor eliminates risk of servo jitter and enables use of a wide range of servos.

- Relatchable towhook function available on request.

- 1 spare position inputs for future enhancements.

- Keeps track of servo position, even in power down mode. Important for F1C as the servos tend to move when the engine is started.

- Very flexible feature setup.

- Compatible with existing Control Boxes and radio transmitters.

This is how it looks, from the top:

F1C20T.JPG (34157 bytes)

And from the bottom:

F1C20B.JPG (33353 bytes)

Size of the F1A/F1C version excluding connectors is approx 27mm x 54.5mm, connectors and mounting holes can be cut off in case of space problems. Size is then 27mm x 45mm.

Connecting F1B and F1A/F1C Timer 2.0, including some hints (PDF format)

F1B timer :

Dedicated F1B timer using rechargeable batteries. Some of the specifications are:

- Operates on 2.4V supply from 2 rechargeable NiMH cells.

- Mercury switch or prop fold switch option.

- Software is stored in FLASH memory and is therefore upgradeable. New features will be available upon request.

- Controls 1 servo.

- RC DT option.

- Buzzer output.

- Very flexible mechanical design of faceplate including direct position control.

- Direct drive of servo motor eliminates risk of servo jitter.

- Compatible with existing Control Boxes and radio transmitters.

- Size of the F1B version is approx 25mm x 38mm, ex. connector (there is only one connector). Connector adds approx. 6.5mm in length.

Information's on revision 1.1 of the MultiClass timer:

Download the latest version of the MultiClass timer Manual in .PDF format.

Hints for F1C usage currently just some pictures of Thomas Koster's model.

Do you have the Adobe Acrobat Reader? It is available free from Adobe's homepage

Other links:

You can find links to several suppliers of timers and other stuff at the SCAT homepage.

Recommended battery:

For all electronic timers, I recommend the Sanyo N-120TA. It is 7.8mm in diameter and 43mm long. The weight is 6g and the capacity is 120mAh.

The disadvantage is size and weight, but if you can live with that, you'll get the battery with the best performance I have ever measured. I expect it to work for 5-10 years, it has a very low internal resistance and it performs very well in cold weather since it is a NiCd battery.

SanyoCell

This is what a 4 cell (2 by 2) pack looks like:

Sanyo4Cells

Contact information:

e-mail: contact@tonas.dk

Postal address:
Tonas
Torleif Jensen
Tulipanvej 16
3550 Slangerup
Denmark