Message from @Ondsinet

Discord ID: 509399248325050388


2018-11-06 11:41:37 UTC  

For me it takes at least 4/5 months

2018-11-06 11:41:46 UTC  

1.5weeks to 1.5 months

2018-11-06 11:41:55 UTC  

What

2018-11-06 11:42:17 UTC  

1.5 weeks is a rare treat

2018-11-06 11:42:32 UTC  

FastTech takes longer

2018-11-06 11:43:23 UTC  

bearing in mind that anything you order which contains batteries will take longer because of policies

2018-11-06 11:44:31 UTC  

Yeah, but for me it's usually half an years

2018-11-06 11:44:49 UTC  

i dont know any local place other than Fry's which is a long ass drive out of town and a ripoff as far as price and selection

2018-11-06 11:44:51 UTC  

I only buy in bulk and stuff that you can't otherwise find

2018-11-06 11:45:16 UTC  

bulk orders have lead times, i havent gotten a big order in yet

2018-11-06 11:45:33 UTC  

how fast is your local mail in general?

2018-11-06 11:46:29 UTC  

On eBay there are some good shops

2018-11-06 11:47:00 UTC  

Last spring I bought hundreds of ICS and smd components and I got them in a week

2018-11-06 11:47:09 UTC  

From the other side of the country

2018-11-06 11:47:18 UTC  

Fuck the EU lol

2018-11-06 11:52:53 UTC  

can get 10x 555 ic for $4 USD on ebay shipped from USA, not bad but--have to watch out for drop shippers who dont actually have it in stock yet

2018-11-06 11:53:48 UTC  

some niggas just put up listings and order the shit from china as soon as they get your order <:pepe_hang:460603218766987298>

2018-11-06 11:54:56 UTC  

it sure is hard to plan a project with month+ lead times

2018-11-06 14:58:48 UTC  

Yeah, immagine having to plan for 6+ months from China

2018-11-06 16:09:52 UTC  

We should get an electronic board

2018-11-06 16:10:44 UTC  

I'm not comfortable talking motors and circuits on a computer science board

2018-11-06 18:30:06 UTC  

ha electricf chair for you're mum

2018-11-06 18:30:37 UTC  

no your

2018-11-06 20:25:01 UTC  

<:super_edgy:426099058466095119>

2018-11-07 11:26:27 UTC  
2018-11-07 11:58:13 UTC  

@Ondsinet but we're plugging motors into computers, which are made of circuits

2018-11-07 18:09:18 UTC  

L293D IC has 2 VCC pins, which each want a ".01uF or higher capacitor".
How much higher? Can I use too much capacitance? for instance a shield board for same IC uses 47uF instead of 0.1. are they gaining performance this way or just using them out of convenience?

Does it matter which kind of cap I use? I was just going to use electrolytic, but let's say i used wax or ceramic, is there a difference besides capacitor lifespan?

2018-11-07 19:20:37 UTC  

can't use too much capacitance

2018-11-07 19:21:39 UTC  

If it was for noise filtering it might make a difference, but I guess it's just to deal with the spike when the motors start up

2018-11-07 19:22:02 UTC  

in this case electrolytic it's fine

2018-11-07 19:22:39 UTC  

it also won't bring much of an increase in performance btw

2018-11-07 19:53:57 UTC  

https://cdn.discordapp.com/attachments/423219052849397773/509817808016769044/IMG_20181107_205253.jpg

2018-11-07 19:54:48 UTC  

driver circuit for a motor

2018-11-07 19:55:12 UTC  

5v to 20v driver for a mosfet

2018-11-07 20:52:06 UTC  

.1uF ceramic "bypass cap", apparently standard requirement on all VCC pins on all ICs

2018-11-07 20:54:31 UTC  

and that can be paired with a larger EC cap for(i think) decoupling, though that isn't mandated by my datasheet

2018-11-07 20:58:11 UTC  

and, my god man, i've never had to look at a circuit diagram in handwriting before. <:pepe_hang:460603218766987298>

2018-11-07 22:30:58 UTC  

Fag

2018-11-08 01:32:05 UTC  

buy a decent pen

2018-11-08 04:02:24 UTC  

I wonder why my shitty starter kits dont use bypass caps on any IC in the lessons

2018-11-08 05:39:10 UTC  

*Design Note; In basically every data sheet a 0.1uF is indicated as a general rule of thumb.*
*IC 'B' uses two By-pass capacitors, a small value ceramic [0.1uF] and a larger value tantalum capacitor [2.2uF] for example.
Using two by-pass capacitors, normally a decade apart in value is called Compound By-passing.
A number of data sheet require compound by-passing on some power pins.*
**However because of pin density or lack of board space it is not always possible to comply with the data sheet.**
<http://www.interfacebus.com/Design_Capacitors.html>