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Diy LED strip light PWM fading controller

Got tired of my poor desk lighting so I went and bought some warm white led strip lights off ebay. To power them I programmed my own 8 bit software pwm driver ...

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Rodri Requena commented on 25 Jan 2015

hello, can you send me the circuit controler and the code for the pic? very nice proyrct! thanks.

Christian Louise Dizon commented on 07 May 2015

Hi can you post the schematics and code? Thanks

Κωνσταντινος Κοντης commented on 18 Oct 2015

can you post the schematics and code?

DIY PWM Servo Controller

This circuit is being designed as part of a camera jib controller. Pulse Width Modulator (Two A-stable 555 timers) hooked up to a pot(Arcade style joystick) ...

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dxtbot commented on 11 Oct 2012

i try to make a antenna tracker ,, but used 1 lm555 ,, forward motion = ok ,, but when i go back its jitters ,, its probely the digital servo ,, some advise on yours you use 2 ,, is this a real differnts ,and do you use digital servo ?

Dan Racusin commented on 24 Nov 2011

@UberWagen Each 555 is set to pulse at a different frequency. So yes one is for CW and the other is for CCW. Although, I believe the better way to do this would be to use an H-bridge. Do you know of a better way to do this?

Dan Racusin commented on 24 Nov 2011

Each 555 is set to pulse at a different frequency. So yes one is for CW and the other is for CCW. Although, I believe the better way to do this would be to use an H-bridge. Do you know of a better way to do this?

Calvin Wagner commented on 24 Nov 2011

why did you need 2? One for clockwise, other for CCW?

Portal12345678910 commented on 05 Dec 2012

is this a standard 180 servo?

PWM dc motorcontroller for diy electric bicycle

This version is a beta 0,8 ;) No current limiter or temperature protection. But it works, it can spin the wheel of my bicycle, also with a little load to it. But the FET will ...

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Leland Clayton commented on 24 Jul 2015

I know it's been three years and all but im having issues with the circuit. It's the same circuit I have seen floating around the web and I can't get it to work correctly. I have 5 volts going into the PWM circuit and 12 volts for the motor. Five volts comes out of the fet for some reason and causes my power supply to only use 5 volts to protect itself. Any ideas?

Leland Clayton commented on 24 Jul 2015

+Leland Clayton FWI, I even tried pumping 12volts into the PWM circuit and still doesn't do anything worth wild.

DIY Solar - Why MPPT over PWM?

This is an earlier video I made but never uploaded. I upload it now due to some comments made in other videos talking about MPPT vs PWM controllers.

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rhandsom commented on 22 Mar 2013

Thanks for your question. Panels will produce power (watts) within the range for which they are rated, in your case will be around 100w + or - under "ideal" conditions. MPPT's will help to get the "most" Amps of those watts to your batteries, (watts in = watt out), MPPT's have a DC to DC conversion circuit that will allow the unit to convert the higher voltage to more amperage (in the process it decreases volts) to the battery(s), while maintaining the total power (which is watts = V x A).

rhandsom commented on 24 Sep 2011

@Fearlessthinker Thanks for your clarifications. And you are right. This video was to address a previous comment made on another video referring to MPPT vs cheap PWM's and buying additional panels. What I want to emphasize to someone new is the charging capability. Those panels in series produce approx just over 7 amps on their own, but by using a quality MPPT controller there is a definite boost in the charging performance, i.e., 12 amps to the battery as opposed to just 7 amps. Thanks;

55vdub commented on 10 Mar 2013

I'm using a 180w 36V panel (yes this is a true 36V panel) with the same SunSaver MPPT unit. Panels are 60 feet from my batteries (not ideal but located for max sun) wired with #8 copper to minimize line loss. the batteries are reclaimed sealed gel cells from a Telus repeater station 12 volt 650 amp/hour for $500 (a steal of a deal) The higher voltage panels transmit better over distance than 12 or 24 volt units. the SunSaver gets the maximum power these panels can deliver at a good cost!

rhandsom commented on 24 Sep 2011

@akaishs In my opinion, the (2) 200Watt panels are a nice start. Proper placement is critical. The rest depends on your needs and the type of system 12v or 24v? 24v is more efficient. The batteries are fine. Safety is important, be sure to get proper cables, fuses, and disconnects. I think a 100W inverter is too small, I would increase the wattage. A 400W inverter is a good start (250W if it's a Grid Tie). A 30A PWM controller is good but a 15A or 30A MPPT is better (depends on panels).

Fearlessthinker commented on 24 Sep 2011

As you know, efficiency is Pw(out)/Pw(in). The 12.8A out is more a reflection that your battery bank voltage is ~25V vs. the voltage of the series panels which is ~35V. Still, the MPPT is awesome. I have a Blue Sky MPPT charge controller and that same Timetric meter, so once I get that all installed we can share results. I'm operating with a 12V battery bank initially. If you can measure the actual V and A into your SunSaver you could calcutate the actual efficiency value. Good stuff.

rhandsom commented on 22 Mar 2013

PWM's will take whatever power is coming in from your panels to charge your batteries based on the rated voltage and amperage of the charge controller. In essence it's the same or similar to any standard battery charger you buy from an autoparts store, simply there to keep your battery from overcharging. These units are fine for simple and small backup systems. If you are considering growing into a larger system I recommend going with the MPPT's, MPPT = faster more efficient charging.

rhandsom commented on 25 Sep 2011

@randacnam7321 Your right, a single MPPT controller is not recommended if mixed arrays are involved. That's why I use dual MPPTs of the same make and model. They work in tandem very effectively. Granted, there was the additional cost and complexity in the design, but it was well worth it. I would agree that PWMs are a better choice if the array consists of a mixed match assortment of different panels with varying characteristics or if cost and simplicity of system design is an issue.

rhandsom commented on 26 Jan 2012

@sjh7132 Actually, a better analogy would be why use a motorcycle instead of bicycle. Yes, they both have wheels but they are two different technologies designed to do similar things. However, one technology will achieve the result faster than the other. Why?, because it utilizes more advanced technology. They may operate on some of the same basic principles but through the technology used, they are clearly different. Take Care.

Charles McCune commented on 15 Jul 2012

what is cool with both system is they take a higher voltage and use it to charge a systemof lower voltage. IE 60 volts to charge a 28.8 volt system ect. so the 12 amp you are getting is the downconverting of the voltage. they kind of act like a step down transformer. you put in 120 at .6 amps and you are able to get 12volts at currents up to 6 to 8 amps depending on the windings a pwm and MPPT works so much in the same way.

rhandsom commented on 01 Aug 2013

I've done the experiment with my panels in parallel and I've not seen any boost in amps, since the panels were in parallel they didn't have high enough voltage too make a difference. At least for my setup, panels in series has the highest benefit with my mppt's in terms of charging capability. If I was going to go strictly parallel wiring then I would stick with a PWM.

alexermerson commented on 01 Aug 2013

I realize that there are benefits to hooking up solar panels in series that can only be processed with an MPPT controller, but assuming you had sufficient gauge wire to hook the panels up in parallel instead of series, how much current boost would the MPPT controller give over a PWM? Those same two panels in parallel should give over 15 amps.

akaishs commented on 24 Sep 2011

Hey nice comparison.I want to set up a starter DIY system at home back in jamaica was thinking 2x 200watts panel 30apm charge controller 100watt pure sine inverter and 4x6vx225amph deep cycle battries and do the add ons as time goes by. What r ur thoughts, Thanks

rhandsom commented on 27 Mar 2012

I believe the cost depends on where you purchase the unit. I thought ecodirect(dot)com had a good price. There are other cheaper brands available on the Internet. But remember the point is that MPPT = faster charge times.

LiPe VoLcOm commented on 21 Mar 2013

My question is will a 100w rated panel produce more then 100w with a mppt ? And the pwm will do the rated wattage or lower ? I got two pwm 10a cont on amazon and eBay at least they were free promotion codes

John Davis commented on 20 May 2013

PWM produces Radio Frequency Interference and MPPT does not. As a licensed amateur radio operator this is important to me. It would be something to consider for anyone concerned with RFI for any reason.

randacnam7321 commented on 25 Sep 2011

One thing about MPPT controllers is that they need arrays of matched PV modules in order for the controller to work properly. For mixed arrays PWM controllers are better.

akaishs commented on 25 Sep 2011

Sorry its a 1000 watt and i will set it up in Jamaica which is a tropical island where i ave about 15 hours of sunshine all year round. Thanks for the response.

sjh7132 commented on 26 Jan 2012

MPPT controllers use PWM, don't they? Saying why to use MPPT over PWM is kind of like saying why to use cars over wheels. At least that's my understanding.

55vdub commented on 13 Mar 2013

It works well enough, thanks but now i want more panels and bigger batteries...never satisfied with what I have syndrome lol. what are you running?

rhandsom commented on 27 Mar 2012

I think Blue Sky has a well priced model. ( I believe that's the name). Good mppts' are not going to priced like PWMs'

Jorge I. Pascual commented on 21 Apr 2013

On your trimetric meter what do you have your charge setpoint at 26, 27, 28 volts

rhandsom commented on 21 Apr 2013

I have it set for 26v to indicate fully charged and into float mode.

Bernard Lim commented on 04 Jul 2013

MPPT is just a fancy term in software algorithm for COMPENSATION.

DIY PWM Speed Control for a CNC Spindle

This Speed Controller uses a Raspberry Pi to both read the Spindle's Speed & generate a varying PWM signal needed by the 48V/400W electronic controller to ...

User Comments

CSL Detailing Auto Botosani commented on 02 Apr 2015

Hi can you tell me more please hoe did you set up the speed sensor wireing and mach3 setup? Thx You can email me at [email protected]

jmhrvy1947 commented on 02 Apr 2015

+CSL Detailing Auto Botosani Thanks for the questions. If you haven't already found it, I made another video on this topic (https://www.youtube.com/watch?v=kYFNUQgE26E). It's actually a cheaper solution, and it also includes links to a wiring diagram as well as the code. If it doesn't help with what you're after let me know, and we'll go from there

DIY LED Strip Light PWM Fading Controller

PWM LED STRIPS (part 2) using Atmel 89s51. Pulse Width Modulation is a simple method for controlling analog devices via a digital signal. It's also an efficient ...

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