Technical advises

It’s a good idea to look out these two IPC training videos to learn or remind you some essentials rules on soldering :

 

 

A good drawing to master your technique :

 

Protect your soldering iron from oxidation and use a brass sponge rather than a Sponge Bob.

Alpes Machines advise you to solder resistors and cheap components from the top just to spare some time in the building. This is not the academic way, but it can work rather good. In that case, don’t solder both top and bottom sides. If you need to remove a component later, you just have to break it into to pieces with a cutting plier for an easier removal.

 

It is strongly recommended to use DIP sockets for ICs, just to swap ICs while debugging your building for example. It is also strongly advised to NOT solder the switches in a first time but test the Ctrlr some weeks and, then, finish the job. The knobs should be applied last, once everything is confirmed to work as expected because removing knobs stress the potentiometers each time more and more.

Now we can continue.

 

 

Recent Posts

Matrix Ctrlr 1.38 update

There is a long time we have published some news !

We (or should say “I” as alpesmachines is a single guy project) have been focused on daily life things and a regular job but some prototyping projects should be exposed in the next weeks …

We have also invest some time to enhance the Matrix Ctrlr and you can find the latest revisions 1.38 on Github here :

  • One major improvement is a faster display librarian : all the micro delays induced by printing on the display have disappeared. You can trigger very short notes and move all the parameters together now : beware to the musical results !
  • ARP Menu : now you can set the split point in between the arpegiated section and the sequenced one with a midi learn : simply press KEY2 under SPLT and send a midi note to define the split point. A customer request !
  • We have also improved the ADC stability by using a moving average method to filter power supply noise and thus having a more stable reading of the potentiometers. It can be access under the CFG/MISC/JTR parameter. A lower value uses lots of filtering (drawback the calculus is longer so the printed value is a little delayed) while a higher value is more responsive and sensitive to noise. The value can be set by pressing KEY4 and saved with PAGE. Now you can use a very bad quality power supply if you like.

We still have a few kits in stock and you need to order a Matrix Ctrlr ECO kit + assembly service to have a ready to use unit.

We recommend to have firmware 1.20 or 2.15 inside your Matrix 1000 or Matrix 6 : we provide Oberheim EPROM if necessary.

 

 

There are also Stereo One-O-Six Chorus kits in stock, a nice companion to add wide stereo effect to a mono synthesizer !

We wish you all the best and enjoy the unlockdown freedom !

 

julien

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