Search found 1629 matches

by lyndon
Fri Sep 28, 2018 4:38 pm
Forum: Projects
Topic: simple timer
Replies: 15
Views: 426

Re: simple timer

Here, this is probably the simplest path forward: https://www.adafruit.com/product/2935
Four switched A/C outputs you can control with an Arduino.
by lyndon
Thu Sep 27, 2018 4:18 am
Forum: Projects
Topic: Mini freewheel / overrunning clutch on stepper motor
Replies: 1
Views: 151

Re: Mini freewheel / overrunning clutch on stepper motor

Try Stock Drive Components.
by lyndon
Wed Sep 26, 2018 4:54 am
Forum: Projects
Topic: simple timer
Replies: 15
Views: 426

Re: simple timer

The Arduino can't turn on much more than an LED or two per output. You will need a relay/relay board (yes, normally open)for anything over 20mA or so.
by lyndon
Tue Sep 25, 2018 6:46 pm
Forum: Projects
Topic: simple timer
Replies: 15
Views: 426

Re: simple timer

I have a post with some code here.
by lyndon
Wed Sep 19, 2018 4:21 am
Forum: Arduino
Topic: Bluetooth
Replies: 8
Views: 340

Re: Bluetooth

Normally, Str1 would be a char array

Code: Select all

char Str1[20]
or similar. And you would reference the second element as

Code: Select all

 char c = Str1[1]
. But in your example Str1 & Str2 are int.
by lyndon
Thu Sep 06, 2018 5:27 pm
Forum: Projects
Topic: Motor Selection Assistance / Low RPM, High Torque
Replies: 3
Views: 220

Re: Motor Selection Assistance / Low RPM, High Torque

The simplest way by far is to assemble the system you plan to build and at the point where the motor would go, attach a torque wrench and see how much torque is required to accelerate it up to the speed you want.
by lyndon
Tue Sep 04, 2018 7:25 pm
Forum: Projects
Topic: Motor Selection Assistance / Low RPM, High Torque
Replies: 3
Views: 220

Re: Motor Selection Assistance / Low RPM, High Torque

Look at the Firgelli Automation gear motors. Lots of torque and pretty cheap.
by lyndon
Thu Aug 30, 2018 7:00 pm
Forum: General Chit Chat
Topic: From prototype to production?
Replies: 7
Views: 1557

Re: From prototype to production?

You learn new techiques. Hand soldering doesn't work well below 1206 parts or 0.5mm lead spacing. Below that you need to use paste and reflow. It's so much faster, I never make through-hole boards anymore! It's really not hard, although I personally don't go below 0603 parts. You need to do a PC boa...
by lyndon
Thu Aug 30, 2018 2:16 pm
Forum: General Chit Chat
Topic: From prototype to production?
Replies: 7
Views: 1557

Re: From prototype to production?

Generally speaking, prototype with the parts you expect to use in production unless there's good reason not to. I think what you are describing can be better described as a "proof of concept" than a prototype.
by lyndon
Mon Aug 27, 2018 8:56 pm
Forum: Projects
Topic: Conductive thread and LED art project advice
Replies: 2
Views: 186

Re: Conductive thread and LED art project advice

Have you asked on Adafruit where you saw that thread? They have a bunch of people who work with textiles and electronics and can probably point you at a good starting point.
by lyndon
Wed Aug 22, 2018 10:16 am
Forum: General Chit Chat
Topic: University degree - help
Replies: 2
Views: 1016

Re: University degree - help

Not a typo: (s)he's looking for someone to carry her/him.
by lyndon
Wed Aug 08, 2018 11:17 am
Forum: Projects
Topic: On - Off Switch with a momentary Button
Replies: 3
Views: 187

Re: On - Off Switch with a momentary Button

A Teensy is awfully big. An Adafruit Trinket is smaller. I was a bit harsh on the pricing statement: you can pick up an easy-to-program AVR like a Tiny13 and program it with a SOIC clip if you don't want to take up the space for a programming header and the cost in single units is only about $0.99 (...
by lyndon
Tue Aug 07, 2018 7:08 pm
Forum: Projects
Topic: On - Off Switch with a momentary Button
Replies: 3
Views: 187

Re: On - Off Switch with a momentary Button

I would go the ATTiny route or even the Arduino route. By the time you have all the bits for a DIY AT Tiny board, you're past the price of a cheap Arduino. Alternately, you could use a binary counter and every time you close the switch, you get a toggle on D0. But here, you'll need some kind of debo...
by lyndon
Wed Aug 01, 2018 11:41 am
Forum: Projects
Topic: Trouble with a Transducer - Trying to switch it off
Replies: 10
Views: 677

Re: Trouble with a Transducer - Trying to switch it off

I'm confused.
In his first post jremington told you how to address the problem. What is wrong with that solution? As far as I can tell from your problem description, it should work just fine.
by lyndon
Tue Jul 31, 2018 8:22 am
Forum: Projects
Topic: Need part help
Replies: 8
Views: 219

Re: Need part help

You can find them at most hardware stores or Home Depot.