Search found 1627 matches

by lyndon
Sat Dec 08, 2018 9:13 am
Forum: Projects
Topic: Help with stepper motor position
Replies: 5
Views: 48

Re: Help with stepper motor position

One important thing to bear in mind is do you need to know the position of the motor shaft, or the position of what it's driving?
by lyndon
Fri Dec 07, 2018 2:59 pm
Forum: SparkFun Product Questions
Topic: Parallel the TB6612FNG?
Replies: 9
Views: 207

Re: Parallel the TB6612FNG?

It will probably work based on my memory of the chip. Googling reveals that few people have done it.
by lyndon
Fri Dec 07, 2018 2:53 pm
Forum: PCB Design Questions
Topic: thick&tiny PCB design?
Replies: 2
Views: 123

Re: thick&tiny PCB design?

Actually, thinking more about it, I'd use a more "normal" PCB size with a right-angle light pipe to attach the fiber. I assume that standard fiber optic connectors would be too bulky?
by lyndon
Fri Dec 07, 2018 9:22 am
Forum: Projects
Topic: Help with stepper motor position
Replies: 5
Views: 48

Re: Help with stepper motor position

The main benefit of microstepping is smoother motion, not more precise control. I wouldn't trust the accuracy below half step or so, depending on the particular motor you are using. If you need more precise motion, gear it down. For knowing startup position, yes you will need some sort of absolute p...
by lyndon
Fri Dec 07, 2018 9:19 am
Forum: SparkFun Product Questions
Topic: Parallel the TB6612FNG?
Replies: 9
Views: 207

Re: Parallel the TB6612FNG?

Why do you want to parallel it? If you need more current, simpler to use something rated for that higher current.
by lyndon
Thu Dec 06, 2018 6:31 am
Forum: PCB Design Questions
Topic: thick&tiny PCB design?
Replies: 2
Views: 123

Re: thick&tiny PCB design?

Why not order standard thickness PCB and put them back to back?
by lyndon
Sat Dec 01, 2018 6:42 pm
Forum: Projects
Topic: Remote Arduino cabin monitor
Replies: 4
Views: 67

Re: Remote Arduino cabin monitor

Raspberry Pi is more appropriate.
by lyndon
Thu Nov 29, 2018 5:48 pm
Forum: Arduino
Topic: Permanent arduino connection
Replies: 2
Views: 35

Re: Permanent arduino connection

Nothing wrong with the standard Arduino jumpers as long as the pin & socket is tight. I use them all the time since they are faster than making up custom wire harnesses. The key is to keep the pin & socket joint from being able to work loose. So bundle them together and zip tie the as you you would ...
by lyndon
Mon Nov 26, 2018 6:44 pm
Forum: Projects
Topic: Sound Level Warning Device: Suggested shopping list
Replies: 10
Views: 208

Re: Sound Level Warning Device: Suggested shopping list

Asking for someone to code it for you isn't a dick move: there are entire industries built on this very concept of "exchange cash for X service." Sometimes you simply don't have the time to get something done. That said, I'd offer to do it for you, but I don't have the hardware and it simply wouldn'...
by lyndon
Mon Nov 26, 2018 8:42 am
Forum: Arduino
Topic: HX711 && getUnits() steady state reading
Replies: 5
Views: 51

Re: HX711 && getUnits() steady state reading

I don't understand. Isn't the "current weight" exactly what you said you are looking for?
by lyndon
Mon Nov 26, 2018 8:37 am
Forum: Arduino
Topic: Rotary Encoder to Voltage (0v-5v) - MCP4725
Replies: 10
Views: 222

Re: Rotary Encoder to Voltage (0v-5v) - MCP4725

What jremington is getting at is exactly your problem: you're unskilled at programming and this is primarily a programming task. So you should start by learning to program something simpler and work up. What you are asking for is certainly possible and not particularly difficult. A basic algorithm w...
by lyndon
Sat Nov 24, 2018 4:48 pm
Forum: Arduino
Topic: Rotary Encoder to Voltage (0v-5v) - MCP4725
Replies: 10
Views: 222

Re: Rotary Encoder to Voltage (0v-5v) - MCP4725

Sure, what's your budget? Alternately, research frequency-to-voltage converter circuits.
by lyndon
Sat Nov 24, 2018 9:51 am
Forum: Projects
Topic: Beam-break sensor w/ reflector panel
Replies: 6
Views: 93

Re: Beam-break sensor w/ reflector panel

I see. The lowest cost retroreflective sensor I could find with that range is an Omron unit for $300. The price drops an order of magnitude if you use a through-beam sensor, although then you need an emitter and a detector separately. If you drop your distance requirement, there are a lot more optio...
by lyndon
Fri Nov 23, 2018 4:27 pm
Forum: SparkFun Product Questions
Topic: Redboard & 3.3volt snsors
Replies: 6
Views: 172

Re: Redboard & 3.3volt snsors

Have you actually tried it?
by lyndon
Thu Nov 22, 2018 11:43 am
Forum: Projects
Topic: Beam-break sensor w/ reflector panel
Replies: 6
Views: 93

Re: Beam-break sensor w/ reflector panel

Search Amazon and you should find quite a few. I repackaged and resold one, but I don't have my records on exactly which one I used right now.
15 m is a pretty long distance though.