Temps Utile - Build notes

This is the Swiss army knife of Euro modules.

Probably along side the Ornament & Crime (and a Make Noise Maths) it's a really useful module

that no system should be without.

I was surprised how easy the Utile was to build. I wouldn't say it's beginner level, but certainly intermediate.

If you are ok with 0805 SMD, you will find this easy.

I'm building rev1.c

 

These are just my personal notes to help trouble shooting the module should I run into any pobs.

 

 

jUST  one PCB. Here are views of the front & back.

 

 

Official Build guide:

https://github.com/mxmxmx/temps_utile-/wiki/build-it

BOM:

https://github.com/mxmxmx/temps_utile-/wiki/BOM_rev1b

There are 6 (independent) channels / 6 modes per channel: 

It's a:
- trigger sequencer/sequence editor 
- clock divider/multiplier
- LFSR (Linear Feedback Shift Register)
- random w/ threshold 
- euclidian pattern generator
- logic (AND, OR, XOR, NAND, NOR, XNOR) 
- DAC (channel #4 only): random, binary, "Turing", logistic, sequencer/arpeggiator 

So quite useful.

THe microcontroller is a teensy.

.. teensy 3.1/3.2

+ Microcontroller Index Page

hardware specs: 

- teensy 3.2 @ 120MHz, w/ 128x64 OLED 
- 16.67kHz update rate, < 100us trigger-to-output latency 
- 2 clock inputs (> 100k input impedance; threshold ~ 2.5V) 
- 4 CV inputs (100k input impedance, -/+ 5V, assignable to (almost) any parameter) 
- 6 clock outputs (5 digital, 1 DAC (12 bit): 10V (GPIO), -/+ 6V (DAC)) 
- two encoders w/ switch; 2 tactile buttons. 
- 14HP, ~ 25 mm Depth 
- stupid name courtesy of M. Louis Lapicque 

---------------------------------------------------------------

This is where the OLED is parked.

OLED:

you can find these 7 pin, 1.3" displays on ebay, aliexpress and other places for < 10$. they'll be ok, as long as the description claims that they are SH1106 (or SSD1306); and that the pinout is:

GND - VCC - D0 - D1 - RST - DC - CS, or

GND - VCC - CLK - MOSI - RES - DC - CS

 

ICs first

 

TL074	SOIC-14	2x	595-TL074CDR	output amplifier
MCP6004	SOIC-14	1x	579-MCP6004T-I/SL	CV input buffer
MMBT3904	SOT-23	2x	512-MMBT3904	NPN
1N5817	DO-41	2x	621-1N5817	Schottky, reverse voltage protection
LM1117-5v0	SOT-223	1x	511-LD1117S50	5v LDO
LM4040-5.0	SOT-23	1x	926-LM4040DIM350NOPB	prec. voltage reference, 5v0
fixed inductor, 10uH	1206	1x	81-LQH31MN100K03L	> 25mA

TL074

Bevel indicates pin 1.

lies on same side

 

 

fixed inductor, 10uH

1206

1x

81-LQH31MN100K03L

> 25mA

The inductor is just below the lower right corner of the teensy,

+ Inductors, ferric beads, noise reduction methods, etc

These are encoders

Jacks

Putting the jacks in first helps you orientate the front panel and make sure the space between the panel & PCB is enough.

 

You need two tactile switches and their switch caps

aLMOST THERE

I soldered the OLED permanently to the PCB, though I guess you can used a header to allow replacement.

The spacers, help to support the OLED. They rest on, but but aren't attached to the PCB.

 

----

Re the Teensy.

I uploaded the hex file to the teensy before  I attached it to the module.

This way, it receives all its power and programming via the one USB cable.

 

If you are doing it this way, don't cut this until the upload is done.

 

The two power pads are connected.

 

Download the hex file

And upload to the teensy

Use the Teensy loader from PJRC

https://www.pjrc.com/teensy/loader_win10.html

 

Once upload is complete, use a fine blade to cut between the two power pads on the teensy and check for shorts with a multi meter

 

Plug in the teensy and power up the module.

It's always nice when things just work the first time.

If you need to upload the hex file again, you can still do it, but leave the teensy connected to the Temps Utile module. It now receives its power from the module.

Connect the teensy to your computer via USB as usual.

Links

+ Muffs

+ Module overview - youtube

+ Integrated circuits - packaging

https://github.com/mxmxmx/temps_utile-/wiki/build-it

https://github.com/mxmxmx/temps_utile-/wiki/Temps-Utile

+ Microcontroller Index Page