Befaco MIDI THING v1 User manual

MIDI THING V1 - ASSEMBLY GUIDE – Rev. Feb 17
THANKS FOR CHOOSING ONE OF OUR KITS!
This assemb y guide has been designed taking into account the common issues that we often find peop e experience in
our workshops. The order in which the components are p aced on the board is meant to make assemb y as easy as
possib e.
Some steps are not obvious, so even if you're an experienced DIYer, p ease take the time to read the steps thorough y
before starting.
If this is your first project, p ease read this artic e before you start assemb ing the kit:
www.befaco.org/howto/
GOOD LUCK!
MAIN PCB (The sma one)
OPEN MAIN BOARD BAG A
RESISTORS
Qty Va ue Code Name on PCB
4 1k Brown, b ack, b ack, brown, brown R5, R11, R13, R14
4 47k Ye ow, vio et, b ack, red, brown R2, R4, R6, R16
4 68k B ue, gray, b ack, red, brown R1, R3, R12, R15
3 4K7 Ye ow, vio et, b ack, brown, brown R9, R10, R19
2 10k Brown, b ack, b ack, red, brown R8, R17
1 5k6 Green, b ue, b ack, brown, brown R7
1 270 Red, purp e, b ack b ack, brown R18
DIODES
So der the diodes observing t eir polarity. The b ack or white ine on the diode must match with the white ine on
the diode symbo on the PCB si kscreen.
Qty Va ue Name on PCB
1 1N4148 D9 (orange)
2 1N5817 D10, D11 (b ack)
FERRITES
So der the two ferrite beads by using a recyc ed resistor eg passed through each ferrite and proceed as if it were a
resistor. Ferrite beads don't have po arity.
The space for the ferrites is a bit tight. You can either eave some s ack in the eads or eave them unti after you have
fitted the power connector.
Qty Name on PCB
2 F1, F2
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MIDI THING V1 - ASSEMBLY GUIDE – Rev. Feb 17
INDUCTOR
Looks ike a arge, bu bous resistor. No po arity.
Qty Va ue Name on PCB
1 22uH L1
CRYSTAL OSCILLATOR
Ova component with a meta ic finish. This component does not have po arity.
Qty Va ue Name on PCB
1 16MHz Q1
OPEN INTEGRATED CIRCUITS BAG
ICs
First place t e sockets (taking care to orientate them proper y – the notch or dot on one end of the IC shou d match
the image on the si kscreen) and so der them into their correct positions.
Next p ace the ICs in their respective sockets (again taking note of their orientation – the notch or dot on the top of
the IC must match that of the socket and si kscreen).
Qty Va ue Name on PCB
1 6N138 OK1
1 ATmega IC3
2 LF412 IC1, IC2
1 4504 IC4
OPEN MAIN BOARD BAG B
CAPACITORS
Identifying capacitors can be quite tricky. Codes stated are indicative, p ease take a ook at this guide for he p
identifying capacitors: http://www.wikihow.com/Read-a-Capacitor
Qty Va ue Code Name on PCB
8 100n 104 C1, C5, C6, C8, C9, C12, C14, C15
6 22p 22p C2, C3, C4, C7, C10, C11
REGULATOR
Make sure it is positioned correct y with reference to the si kscreen out ine on the PCB
Qty Code Name on PCB
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MIDI THING V1 - ASSEMBLY GUIDE – Rev. Feb 17
1 78L05 REG
ELECTROLYTIC CAPACITORS
Va ues are written on the side of the capacitor. Mind their po arity (The ong eg of the capacitor is the positive (+)).
Qty Va ue Code Name on PCB
3 10uf 10uf C13, C16, C17
MALE PIN HEADERS
P ace and so der the three Ma e Pin Headers over the si kscreen at “JP1”, “JP2” and “ICSP”. Caution: the 2x3 pin
header (“ICSP”) is so dered on the reverse side of the PCB to the components you have a ready so dered. It is the
shorter pins of each pin header that you are so dering.
JP102 is an expansion port that is not current y use. There is no need to so der pins here.
POWER CONNECTOR
So der the power connector at “EPOWER”, ensuring the position is correct: it must be p aced over the si kscreen
marking with the pins facing the edge of the PCB.
CONTROL PCB
OPEN CONTROL BOARD BAG A
RESISTORS
Qty Va ue Code Name on PCB
6 1k Brown, b ack, b ack, brown, brown R102, R104, R106, R107, R109, R111
6 10k Brown, b ack, b ack, red, brown R101, R103, R105, R108, R110, R112
2 300 Orange, b ack, b ack, b ack, brown R114, R113
1 220 Red, red, b ack, b ack, brown R100
FEMALE PIN HEADERS
P ace the two fema e pin headers “JP100”& “JP101” and so der them where the si kscreen indicates.
SPACER
Secure the spacer onto the Contro PCB (through the ho e with si ver out ine) with the main body of the spacer on the
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MIDI THING V1 - ASSEMBLY GUIDE – Rev. Feb 17
component side, and the nut on the opposite.
FRONT PANEL COMPONENTS MOUNTING TIPS:
Now we wi proceed to mount the jacks, MIDI connector, switch and LEDs. This part of the assemb y is CRITICAL. P ease
take your time and read the fo owing instructions carefu y.
These components must NOT be so dered unti they are p aced on the PCB and fu y attached to the front pane .
There are two reasons for this:
•The height of the pane components are not a the same. Because of this, if not attached proper y before
so dering, they wi not stay proper y seated against the pane . This might cause mechanica stress reducing
their ife expectancy and in the worst case cause them to break.
•The second reason is that it is very difficu t to a ign the components to the ho es if the pane is not positioned
prior to so dering. In the case of the LEDs, they are a most impossib e to set to the correct height without
reference to the front pane .
LEDs
P ace the LEDs onto the PCB minding, their po arity, but don't solder t em unti the front pane is in p ace. This is
the on y way to so der them in the right position.
The ong eg is the positive and the short the negative. On the PCB the square pad indicates the negative side and
there is a + symbo to indicate the positive.
Qty Name on PCB
8 D1, D2, D3, D4, D5, D6, D7, D8
MINI-JACKS
P ace a the mini-jacks onto the PCB ensuring they are on the si kscreen side, but don't solder yet.
Caution: the switch nut and the jack nuts ook the same, but they are not equa y sized and wi not fit in each
others' thread, so make sure to keep them separate!
PUSH BUTTON
Remove the nut and the washer of the push button. P ace the push button on the PCB where the si kscreen indicates
but don't solder it yet.
FRONT PANEL
Attach the front panel adjusting the parts one by one if necessary unti they fit. At this point a pair of fine tweezers
can be he pfu .
To finish:
- Secure the parts to the pane in this order: A) Mini-jacks B) Pus button.
- Ensuring a of the above parts are flush with the pane then you can fina y solder them!
WARNING: Do not forget to cut the legs of the push button switch and MIDI connector legs after soldering as they
might touch components on the main board and damage the module.
- Next, adjust the LEDs so that they are flush with the pane and so der them.
- P ace the MIDI connector through the front of the pane and so der in p ace.
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MIDI THING V1 - ASSEMBLY GUIDE – Rev. Feb 17
- Connect the main PCB to the control PCB using the pin headers and ensuring the 3mm ho e match the
spacer. Screw both boards using the screw.
- Connect the power ribbon cable: The red wire (-12V) on the power ribbon cab e corresponds to pin number
one on the ma e power connector. The number one pin is indicated with a sma triang e on the ma e power connector
and a white ine on the main PCB. A white or b ack ine (or “-12v”) marked on your power bus norma y indicates the
corresponding pin.
ENJOY YOUR NEW BEFACO MODULE!
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