Noise generator


PCB reference RU80068.8

Estimated building time: 2,5 hours


To complete this step the PCB with reference RU80068.8 is required:

Elektor Vocoder

Sort all required components as indicated in the BOM.

Bend the diodes so that they fit neatly right away, you need 31 of them:

Solder the diodes on the right position. Note the direction of the black line (component) and tabbed indication (silkscreen). Do not reverse the polarity of these components:

Bend aso the resistors so that they fit neatly right away and solder them according to the BOM on the right position:

Add the IC sockets by soldering only 1 pin. Check both direction and alignment of the IC sockets before soldering the remaining pins:

Solder now the remaining pins:

Also plug the corresponding IC's into the IC sockets, double check the direction of the notch to avoid destroyed IC's afterwards:

Put the 21 pin connector to the board, do not exert any excessive force. Solder only pin 1 and pin 21 and check for a right angle. Correct if necessary and solder all remaining pins:

Insert the transistor and solder only 1 of the legs, this allows lining up the components. Watch the direction of the transistor, correct if necessary and solder the remaining legs.

Thereafter add the trimpot:

Insert the electrolytic capacitors (e-caps), check the values according to the BOM. Solder only 1 of both legs, this allows lining up the components. Watch the polarity, correct if necessary and solder all remaining legs:

Add the film capacitors as specified in the BOM. Solder only 1 of both legs, this allows lining up the components. Crrect if necessary and solder all remaining legs:

Depending on the choosen capacitors, bend the legs as illustrated to adapt the lead spacing:

Finally use a pliers to press all solder pins into the PCB. The solder pins should have a diameter of 1 mm, the holes in the PCB have the same size. So firmly press the pins into the right position:

Thoroughly clean the PCB using flux cleaner and check for bad soldering or tin bulbs:

Congratulations, you have now finished the detecting interface, click here to navigate back to the sibilance expansion guide.

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