WEBVTT
Kind: captions
Language: en

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welcome to the build video for the

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arithmetic module from modulus I'm going

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to start by placing the electrolytic

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capacitors

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pay close attention to the white line

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marking the negative side of the

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capacitor and line it up with the

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footprint on the PCB

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now you can go ahead and place the power

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head off making sure that the arrow

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lines up with the white line on the PCB

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note that the notch should be facing the

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Arduino Nano footprint

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also place the female header with the

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Arduino Nano Which is closest to the

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power header

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now we can also heat up the soldering

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iron and get ready to solder the first

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components in place

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I'm using my finger to hold the

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components in place and suggest to use

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the one pin solder method to fix all of

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the components in place for easier

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soldering

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be careful with the power header

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to not solder the pin that you are

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touching with your finger

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once you've fixed the components of the

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single pin you can check if they are

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sitting flush with the PCB and readjust

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by reheating before soldering the rest

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of the legs

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I have found personally that this

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technique makes through-hole soldering

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quite fast and easy and generally

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results in a very clean finish

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the reason it is important to solder on

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this Arduino Nano header at the

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beginning is because the encoder once

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placed will cover the pins and make it

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impossible to solder on the head

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afterwards

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you may also trim the legs of the

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capacitors once they've been soldered in

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place

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it is highly recommended to trim the

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pins from the Arduino Nano head Archer

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inside the encoder footprint

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the encoder has a metal body

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there is a chance that it will

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short-circuit these pins with each other

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I also like to Reflow these trimmed pins

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in case there is any solder sticking up

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after cutting

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it also looks much cleaner like this

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I am now continuing on to solder the

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rest of the pins in place from the power

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header and the female Arduino Nano

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header

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now we can place all of the Jacks and

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The encoder but do not solder any of

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these yet

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it is much easier if we place all of

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these components

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and then attach the front panel first

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before soldering this will also ensure

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that the front panel will fit

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mechanically

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we can also place the LEDs before

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attaching the front panel

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important to be careful with the

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polarity of the LEDs

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the short Lake indicates the ground pin

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and should be inserted into the square

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shaped pad

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if you have bipolar LEDs then you can

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also check which color you want by

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powering them from a breadboard power

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supply

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if you have purchased a full DIY kit

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from us

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there will be bipolar LEDs in the kit

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these LEDs are red in the normal

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polarity and green if you reverse them

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you can choose which color you would

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like to use for each Channel

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I will use an extra nut and attach it to

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the encoder so that the front panel will

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sit at the same height as the level of

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the other components on the PCB

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now place the front panel and attach all

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of the nuts to secure it in place before

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soldering

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I will begin with the LEDs so they can

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be a little bit trickier to place

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correctly

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and use the one pin method adjusting the

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position as needed before soldering the

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second pin

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the LEDs should be lined up and centered

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with the diffusers on the front panel

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they should also be sitting flush

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against the front panel to ensure that

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enough light comes through

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after soldering the LEDs in place I will

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trim the legs to make it easier to

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solder the jacks

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now I will continue by soldering all of

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the Jacks in place being careful of

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those sitting flush against the PCB

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I am now soldering the five pins and

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support lugs of the encoder these can be

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a bit more difficult because the

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capacitors and female pin header are in

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the way so be careful here

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once these components are placed and

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soldered we can remove the front panel

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in place and solder the remaining female

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Pinhead up for the Arduino Nano

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I am using the Arduino Nano to hold the

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female panhander in place and make it

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easier to sold

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we start by soldering two pins on each

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of the male pin headers on the Arduino

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Nano and continue soldering the bottom

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side of the PCB getting all of the pins

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from the female pin header

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I'm also adding a bit more solder to the

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top side of the PCB on the encoder Lakes

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ensure more stability

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now I'm placing the screen using a

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protection frame that came with it as a

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spacer to push it against the front

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panel

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you may also want to remove the

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protective film to Quicken the build

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push the pins through and hold the

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screen in place while you place the

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front panel on and attach the nuts to

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the encoder

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this will hold it in place making it

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much easier to solder the screen

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I am living in Arduino Nano and place

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here to solder the four pins but you may

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also remove it if it's easier

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I will now finish soldering the male pin

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headers on the Arduino Nano

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protective film from the screen before I

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will now have to remove the front panel

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again to be able to do so

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I'm also doing a quick visual spot to

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see if there are any problems that are

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visible with the soldering before

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attaching the front panel and finishing

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the build

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foreign

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this type of Knob

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tends to slip too far down the shaft of

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the encoder this prevents the push

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button from working properly

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to fix this issue I will place a piece

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of paper or something similar

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inside the knob so that the shaft pushes

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against it

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but this last step the build process is

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complete

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and you should have a fully functioning

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arithmetic we recommend doing a quick

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test to make sure that there is no

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shorts between ground negative 12 volts

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and positive 12 volts

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this is easily done using a multimeter

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and checking for continuity

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thank you