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

 by lyndon ¦  Mon Nov 26, 2018 8:37 am ¦  Forum: Arduino ¦  Topic: Rotary Encoder to Voltage (0v-5v) - MCP4725 ¦  Replies: 10 ¦  Views: 480

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...

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

 by lyndon ¦  Sat Nov 24, 2018 4:48 pm ¦  Forum: Arduino ¦  Topic: Rotary Encoder to Voltage (0v-5v) - MCP4725 ¦  Replies: 10 ¦  Views: 480

Sure, what's your budget? Alternately, research frequency-to-voltage converter circuits.

Re: Beam-break sensor w/ reflector panel

 by lyndon ¦  Sat Nov 24, 2018 9:51 am ¦  Forum: Projects ¦  Topic: Beam-break sensor w/ reflector panel ¦  Replies: 6 ¦  Views: 259

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...

Re: Redboard & 3.3volt snsors

 by lyndon ¦  Fri Nov 23, 2018 4:27 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Redboard & 3.3volt snsors ¦  Replies: 6 ¦  Views: 225

Have you actually tried it?

Re: Beam-break sensor w/ reflector panel

 by lyndon ¦  Thu Nov 22, 2018 11:43 am ¦  Forum: Projects ¦  Topic: Beam-break sensor w/ reflector panel ¦  Replies: 6 ¦  Views: 259

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.

Re: Motor control

 by lyndon ¦  Tue Nov 20, 2018 6:01 am ¦  Forum: Arduino ¦  Topic: Motor control ¦  Replies: 6 ¦  Views: 254

Find out how much current your motor needs and purchase a power supply! Here are 2,500 examples: https://www.digikey.com/products/en/power-supplies-external-internal-off-board/ac-dc-desktop-wall-adapters/130?k=power+supply&k=&pkeyword=power+supply&pv1989=0&sf=0&FV=ffe00082&quantity=&ColumnSort=0&pag...

Re: Sound Level Warning Device: Suggested shopping list

 by lyndon ¦  Thu Nov 15, 2018 7:30 pm ¦  Forum: Projects ¦  Topic: Sound Level Warning Device: Suggested shopping list ¦  Replies: 10 ¦  Views: 414

You said you want it to be accurate. How are you going to calibrate it?

Digikey, Arrow, Mouser, Future Electronics...

A common way is to order them preprogrammed with your code. Many parts vendors offer this service.

Re: Wow... is Sparkfun overcharging like crazy or am I wrong here?

 by lyndon ¦  Wed Nov 14, 2018 11:55 am ¦  Forum: SparkFun Product Questions ¦  Topic: Wow... is Sparkfun overcharging like crazy or am I wrong here? ¦  Replies: 2 ¦  Views: 192

What's your definition of "overcharging?" How did you determine what the appropriate price was?

Re: Amplifier LM358—classical circuits

 by lyndon ¦  Mon Nov 05, 2018 6:03 am ¦  Forum: PCB Design Questions ¦  Topic: Amplifier LM358—classical circuits ¦  Replies: 1 ¦  Views: 229

So I take it, between this and your other post, that your real intent is just to spam the forum to get traffic to that site?

Re: Amplifier LM358—classical circuits

 by lyndon ¦  Wed Oct 31, 2018 4:26 am ¦  Forum: PCB Design Questions ¦  Topic: Amplifier LM358—classical circuits ¦  Replies: 1 ¦  Views: 229

Those specific drawings originate from the National Semiconductor Linear Applications Handbook , but many the circuits themselves may have been published earlier in Walter Jung's IC Op-Amp Cookbook . National Semiconductor is now owned by Texas Instruments. I'm a pretty good mood today :-) If you pr...

Re: Arduino Programming for Salami Production

 by lyndon ¦  Fri Oct 12, 2018 6:39 pm ¦  Forum: Projects ¦  Topic: Arduino Programming for Salami Production ¦  Replies: 3 ¦  Views: 720

tglaser92 wrote: Fri Oct 12, 2018 4:00 pm in Lehman's terms a relay works like this...
Layman's.

Re: LED's For Lithophanes

 by lyndon ¦  Mon Oct 08, 2018 4:24 am ¦  Forum: SparkFun Product Questions ¦  Topic: LED's For Lithophanes ¦  Replies: 3 ¦  Views: 145

Well, he/she didn't say how many batteries could be used, so...

Re: LED's For Lithophanes

 by lyndon ¦  Sat Oct 06, 2018 11:05 am ¦  Forum: SparkFun Product Questions ¦  Topic: LED's For Lithophanes ¦  Replies: 3 ¦  Views: 145

I took a printmaking class several years ago, including intaglio, but I had never heard of a lithophane, before now! That said, I don't think any particular LED will matter, the issue you're going to run into is diffusing the light across the entire scene. Modern LEDs are very efficient but you're n...

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