Anyone any good with electronic components and Arduino?

[SmartManDan]

I've dabbled in Pi's before and have a background in software, however I'm going to shortly be building an Arduino system and it's going to require me digging out my soldering iron and also buying resistors, capacitors etc. I've bought a custom PCB from a chap who I am hoping will get back to me with some guidance, but in the meantime I thought I'd ask here in case it's generic components I need?

So, is anyone here an expert on components, could they check my shopping list below?

This is the website and the PCB I've bought along with the requirements - http://team7000.dk/V2/index.php/diy/trip-master-20...

and, based on his list, this is what I think that I need, which is what I need to check/verify:

ArduinoNanoV30 - Does it need to be genuine, or can I buy Chinese one?

Capacitors - What volts do I need to buy, is 35v ok?

C1 - 1uf https://uk.rs-online.com/web/p/aluminium-capacitor...
C2 - 100 NF https://uk.rs-online.com/web/p/ceramic-multilayer-...
C3 - 100 NF as above
C4 - 100 uf https://uk.rs-online.com/web/p/aluminium-capacitor...
C5 - 33 uf https://uk.rs-online.com/web/p/aluminium-capacitor...
C6 - 10uf https://uk.rs-online.com/web/p/aluminium-capacitor...

IC1 - 7808T I can only find 7808BTG is this ok? https://uk.rs-online.com/web/p/linear-voltage-regu...
IC2 - 4093N - I can't find this anywhere?

Resistors - There are so many variations on RS, all with different watts.
R1 - 1K What WATTS do I need? 1w? https://uk.rs-online.com/web/p/through-hole-fixed-...
R2 - 360 https://uk.rs-online.com/web/p/through-hole-fixed-...
R3 - 10K What WATTS do I need? 0.5w? https://uk.rs-online.com/web/p/through-hole-fixed-...
R4 - 10K as above
R5 - 10K as above
R6 - 10K as above
R7 - 10K as above
R8 - 1K as above
R9 - 10K as above

T1 - 2N3904 - I can only find 2N3904BU Is this ok? https://uk.rs-online.com/web/p/bjt-bipolar-transis...

SW 01 - Switch Momentary - I shall find one somewhere
Sw 02 - Switch Momentary
Sw 03 - Switch Momentary
Sw 04 - Switch Momentary
Sw 05 - Aritech dc555 Hall switch (I can't find this anywhere, but I think he supplies,it)

Display ST7920 128X64 12864 LCD Display - I can find on eBay/Amazon
Enclosure Velleman G311 115x90x55 mm - I can find on eBay/Amazon

[anonymous-user]

I've got fairly detailed experience with arduino, both the electronics, and the programming. I'm not really sure what you are trying to build on your custom PCB there, but I can tell you, to get a functioning arduino, you need very little. Building one on a breadboard is a great starting place.

All you need for a functioning arduino is:

Arduino chip - whicherver - doesn't really matter.
16Mhz crystal (for the clock)
10k resistor
2 x 22 pf ceramic caps
2 LEDs


I also keep a stock of components for a a power supply - 12v taken down to 5v for the arduino

7805 voltage regulator
2 x 10uf caps (electrolytic)
LED (optional) with 220 phm resistor

The caps go over the 12v and 5v side fo the 7805 for voltage smoothing. The LED and resistor show the PSU is working

Great starter guide here.

https://www.arduino.cc/en/Main/Standalone

Once you've built and tested a breadboard arduino you just add inputs and outputs for yoru project.

Personally, I prototype on a prebuilt arduino board - breaking out to a breadboard (they cost so little on ebay) then build a custom PCB for the finished project. This i sone of my projects:

https://www.instructables.com/id/Arduino-Etch-A-Sk...

[anonymous-user]

7805's

- https://www.ebay.co.uk/itm/L7805CV-LM7805-7805-5V-...

Ebay is full of them

Resistors - don't worry about the watts unless you specifically need a high wattage one (you'll know). Just grab a selection pack.

https://www.ebay.co.uk/itm/Resistors-Metal-Film-30...f:0

[SmartManDan]

Loving the Etch-a-sketch

Thanks for the tips on the resistors. The PCB I've bought is for a motorbike computer (A glorified trip meter) but I'll buy a breadboard too even though I don't need one for the build it'll help me solder and things after looking at youtube videos.

You recommended the 7805T, thanks, but the guy's instructions mentioned a 7808T, will any be fine? I'm going to buy the whole Arduino Nano to save me building some bits.

[mike_e]

The Arduino Nano has it's own on-board 5V regulator which requires a >5V supply, that's why a 7808 has been specified. (The 08 and 05 in the part number refers to output voltage). A 7805 will not work properly.

[anonymous-user]

Yep - I use 7805's to power arduinos directly - hence 5v

Regular sized arduinos on boards (duemillenova etc) I just use USB to power them when testing. My projects normally involve motors etc so they have a seperate power supply, taking the load off the arduino and it's USB power supply.

The Etch a Sketch was fun to make! :-) Not my idea but I designed and coded it totally myself.

Edited by anonymous-user on Friday 18th January 11:57

[SmartManDan]

Thanks Mike and Roger.

I've got the shopping list sorted, but notice capacitors are various voltages too. I need

1 uf, 10 uf, 33 uf and 100 uf.

Would this fill pack cover them, is the voltage going to be ok?

https://www.ebay.co.uk/itm/Capacitors-Radial-Elect...

Contains:
1.0 uF 50v
10 uF 25v
33 uF 16v
100 uF 16v

[anonymous-user]

yep - for the electolytics. You'll need some ceramics too. They cost nothing.

Voltages - don't worry about them untill you start dealing with voltages that approach their rating. The cap voltages are not operating voltages, they are max voltages .

[SmartManDan]

Thanks! Order placed... will be a few weeks before my board arrives but dead excited.

[jet_noise]

Why do you need an 8V reg, bit of an unusual value?

Application is motorbike you say.
You may need a bunch of extra bits on any vehicle interfaces esp. power supply input. Vehicle electrical systems are rather nasty electrically and an awful lot of thought goes into idiot-resisting (no such thing as proofing, always a bigger idiot ) electronic system performance and indeed survival.

No experience of Arduino but do of electronics esp. vehicles

[SmartManDan]

jet_noise said:

Why do you need an 8V reg, bit of an unusual value?

Not a clue, that's just what I was told to buy by the creator of the PCB (Link in top post)

[jet_noise]

SmartManDan said:

jet_noise said:

Why do you need an 8V reg, bit of an unusual value?

Not a clue, that's just what I was told to buy by the creator of the PCB (Link in top post)

Looks like a pre-regulator.
Can't see why it's needed, has the same max input capabilities as the 5V one on the nano. It's only used for the nano's Vin (that a 10sec squint at the schematic showed. Nonetheless the bit you found is what is intended.
The 3904 you found is good too.
For the IC, CD4093B is what you need, RS stock it.

If you can, I'd use Farnell rather than RS, RS usually has higher price & MOQ for most things so you'll have a lot of spares!

On the design itself there's no reverse connection protection, make sure you get the supply the right way round!
Also it looks like the 4093 has all unused inputs (pins 5,6,8,9,12,13) left floating. This is really bad practice. Ground or 5V whichever is convenient.