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Home > Projects>Yocto> Sequencer

Sequencer:

The sequencer is a very large part to assemble. Do not reverse the IC. Continue to be careful and precise we soon reach the end. Courage. Prepare components to build the sequencer. List of components:

Image

Description

Part

Value

Qty

Ceramic capacitor (22)

C1, C2

22p

2

Multilayer ceramic capacitor (104)

C3, C4, C5, C6, C7, C8, C9, C10, C12

100n

9

Diode

D1, D2, D3, D4, D5, D6, D7, D8

1N4148

8

Microcontroller

IC1

MEGA1284-P

1

 

40 Pin DIP IC socket

IC1"

 

1

8-bit parallel load SHIFT REGISTER

IC2, IC7, IC8

74HC165N

3

8-bit SHIFT REGISTER, output latch

IC3, IC4, IC5, IC9

74HC595N

4

2-wire serial EEPROM

IC10

24LC512

1

8 Pin DIP IC socket

IC10"

 

1

Rotary switch

INST_SELECT, MODE_SELECT

 

2

3mm Red led

LED1, LED2, LED3, LED4, LED5, LED6

 

6

Led Holder 9mm

  

6

Crystal

Q1

16MHz

1

1/4w Carbon resistor

R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R37, R38

220

22

1/4w Carbon resistor

R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36, R39, R40, R41, R43, R44, R45, R46, R47, R48, R49, R50, R52, R53, R54, R55

10K

31

1/4w Carbon resistor

R42, R51

1K

2

Tact switch with led

S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16

 

16

Tact switch large

S17, S18

 

2

Tact switch

S19, S20, S21

 

3

Switch cap

  

3

Rotary encoder

TEMPO

 

1

 

Make it:


The components of the sequencer are outside the dotted line.

Solder all resistors.

Solder each value one after the other.

Solder  diodes 1N4148

MAKE SURE DIODES ARE IN THE RIGHT WAY

Solder multilayers capacitors (in yellow on the picture)



Solder the crystal

 

 

Assemble the two IC support.

 

Solder the three pushbuttons.

Solder the 18 color pushbuttons. You can arrange the color as you like.

They are a bit hard to implement but gently pressing it sinks without any problems.

Prepare 6 LEDs and their supports.

Solder the 6 leds being careful plated supports to the PCB

CAUTION TO THE ORIENTATION OF LEDS. WELL PUT THE FLAT SIDE TO THE INDICATE SIDE BY SILKSCREEN!

Solder the encoder
To fix rotary switch to the PCB take four pieces of wire or bare copper and bend them the width of the Rotary switch (see picture).
Assemble and solder rotary switch with clamp.

Install the 74hc595 and 74hc165.

Do not connect the power until the IO_Board is completly connected to the Main_Board because the ground of the sequencer is not common to the analog ground.

Now to assemble the IO_Board