Teensy 4.1 For MicroDexed

Description

The MicroDexed-Touch is a popular DIY synthesizer / Groovebox that can be built by sourcing the parts from the project BOM, get it partially prebuilt or build it from a kit.  It is based on the Teensy 4.1 with a 320×240 3.2″ LCD with touchscreen, a PCM5102 audio module, a serial Flash chip module and it is all packaged in either a nice small PCB sandwich (Developers Edition) or a 3D printed enclosure.

The project requires some special pin modification and soldering for the Teensy 4.1 to fit into the compact enclosure.  The software can also make use of optional PSRAM memory if installed on the bottom of the Teensy 4.1.

The PSRAM allows for longer audio delays and other effects..

To make it easier to build this kit, we are offering 2 versions of the Teensy 4.1 (with 8MB PSRAM or 16MB PSRAM) specifically built in the configuration required to complete the kit.

This version of Teensy 4.1 may be built to order and will typically ship in 1 to 2 business days.

People may already have the mating female header sockets from a kit, but if female header sockets are needed, they can be ordered at the bottom of the page.

Please Note:  We keep a small number of each version of the Teensy 4.1 in stock for immediate shipment.  Since this item is hand-modified, if you need more than what we show in stock, the website will allow you to backorder the quantity that you need.  Back-ordered Teensy 4.1 will typically ship within 1 to 2 business days.

Package Includes:

• Teensy 4.1 NE with pins configured for MicroDexed and 8MB or 16MB PSRAM.
• Pinout diagram

Build Specifics:

The base Teensy used for this assembly is the Teensy 4.1 NE (without Ethernet) since this setup does not utilize Ethernet.

Depending on the order option either one 8MB PSRAM is installed in the PSRAM location on the bottom side of the Teensy 4.1 as shown here or a second one is also installed in the Flash location giving a total of 16MB of PSRAM.

The standard gold header pin are then installed from the top side of the Teensy and soldered on the bottom side of the Teensy.  The USB Host, Program and On/Off pins are also installed in the same fashion.  The solder tail pins are then clipped off flush with the plastic insulator to provide the necessary clearance for fitting under the LCD.

When used with 3.5mm low-profile female sockets, this pin arrangement provides a slightly lower clearance over our standard low-profile versions of the Teensy which is needed to meet this projects stack-up requirements.

For full details on the Teensy 4.1 please refer to the full Teensy 4.1 Product Page.

Before they are shipped, the Teensy 4.1 has:

• Base Teensy inspected and tested by PJRC.
• PSRAM chip(s) installed.
• Gold-plated male header pins are installed from the topside of Teensy 4,1 as described above.
• Top pins are clipped and the board is cleaned of flux.
• Test software is run to test the PSRAM.  Blink software is then redownloaded.
• Packaged in resealable ESD bag for safe storage.

Teensy Warranty:

The warranty only covers manufacturing defects.  We guarantee that the Teensy 4.1 will operate correctly when first received out of the bag.  We encourage you to connect the Teensy 4.1 to a USB cable and download ‘Blink’ or other simple test program to verify the unit is basically functional upon receipt.

Once it is installed into a hand-built baseboard and possibly subjected to shorts or other possible damaging electrical signals due to assembly or other errors, there is no guarantee that the Teensy 4.1 won’t fail during use.  Failures of this type are not covered by warranty.  For help in troubleshooting MicroDexed system level issues, please refer to the links below.

International Customers:

We directly ship within the USA only.  For international customers, we recommend creating a free account on myus.com which is a package forwarding service.  We recommend myus.com as we have shipped many packages through them without issue, but there are many other package forwarders that can also be used if you already have an account setup elsewhere.

Once you sign up for an account, they will provide you with a USA address to use on the order since our website won’t accept international addresses.  This address includes a suite number which identifies your packages when they arrive at myus.com.  Please use this address for both the shipping and billing address.   The website will take international credit cards or PayPal.

We then ship the package to myus.com which takes about 2-3 days if you chose the $12.95 shipping and 5-6 days if you chose $6.95 shipping.  They then take care of getting the package to you overseas.  When the package arrives at myus.com, they will update it in your dashboard and send you an email to let you know that it arrived and to see how you want the package shipped overseas.  This can range from postal to DHL Express.

The package will weigh less than 1lb and they have cost estimators on their website for the different shipping services to your country at:   myus.com/pricing/

This account can be used to purchase from any USA company that does not normally ship overseas.  They will also consolidate multiple orders from different companies into one shipment to help reduce your costs.

FURTHER READING:

MicroDexed-Touch – Project overview and software repository.

MicroDexed -Touch Wiki – Build instructions, BOM, troubleshooting and other useful project links

https://discord.gg/XCYk5P8GzF – MicroDexed User Group

Notes: 

1. None

Technical Specifications