anyone tried to using Jebo WP40?

SimonSKL said:
Some dimmers that I found on Amazon use PWM to dim or reduce voltage! That's just perfect. My only concern is the DC output of these dimmers. None of them indicates maximum output to be 24V. That means the pump cannot be driven to max speed. On the other hand the dimmer can reduce to 0 volt so it means the controller will receive no power. Is that a good thing to reduce voltage so low it shuts down the controller instead of the pump?
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Not necessarily. The pwm module I'm using should have worked if that was the case. It powers up, but doesn't spin the pump. Same with stevesled pwm converter. It may need a specific pwm frequency.

I would stay within the pump specs of 12-24v. You'll get the best dimming range that way.
 
Reefcentral hates ebay links? News to me, I assume they don't like people potentially advertizing their own stuff?
 
jrp1588 said:
Reefcentral hates ebay links? News to me, I assume they don't like people potentially advertizing their own stuff?
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Somewhat, yeah. Its in their rules section. Its more so that this thread stays alive and doesn't get locked. Its too informative.

Sent from my Nexus 4 using Tapatalk 2
 
SimonSKL said:
If I am right, the max output voltage of this dimmer is only 12V which can only drive the pump to half of its max speed.

Volt = Watt/Amp or 48W/4A or 12V
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It does put out 0-24v or more precisely 25.8v max.
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2v97wbq.jpg
 
Hmmm, their software allows links but if it causes trouble I ask the mods to punish me, not the thread!

bhazard451 said:
Somewhat, yeah. Its in their rules section. Its more so that this thread stays alive and doesn't get locked. Its too informative.

Sent from my Nexus 4 using Tapatalk 2
Click to expand...
 
Skinnysloth said:
It shuts off if you go too low.
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As Simon pointed out, putting a PWM before the controller will impact the power supply to the controller. Probably not a good idea as the components now have to deal with a supply that is turning on and off really, really fast.

The place to put an external PWM is between the pump and the controller as Floyd did. If you wanted to go that route and only need 5V PWM support. go to ebay and search "dual h bridge L298N". This should give you plenty of results for boards around $4 that will handle 2 pumps and accept a 5V PWM signal.

Dennis
 
SimonSKL said:
If I am right, the max output voltage of this dimmer is only 12V which can only drive the pump to half of its max speed.

Volt = Watt/Amp or 48W/4A or 12V
Click to expand...

Not necesarrily. At 12V you should be able to get 4A. At 24V you will only get 2A, but if the load is less than that, it should be no problem. If the load is MORE than 2A at 24V, than I would suspect the voltage to drop down correspondingly (Or just outright fail).
 
bhazard451 said:
GRRRRRRRR!!!!

The 24v PWM module doesn't work either. It takes the 24+ 24- wire from the jebao controller just fine and powers the module, but neither the Pot nor the Apex will spin the pump. It just doesn't move.

Unless floyd shares a link to the exact PWM module he is using that somehow uses 0-10v or the correct PWM frequency, this wont work.

I'm probably done spending money trying to get this to work. If someone with a scope and a better understanding wants to take a shot at these, please do.
Click to expand...

That stinks. My pump and PWM arrive today.... Hmm. Full power will probably be too much flow. At $40 it's a tough decision between limited control with switchable power or analog control with a POT...
 
dartier said:
As Simon pointed out, putting a PWM before the controller will impact the power supply to the controller. Probably not a good idea as the components now have to deal with a supply that is turning on and off really, really fast.

Dennis
Click to expand...

Thanks Dennis. That was exactly my concern by placing the inline PWM between power supply and controller. At low setting, the controller is receiving high frequency of on and off signals, mostly off. I don't believe the controller is designed for that. I am not electronically savvy but I think the controller needs steady power supply to function properly.
 
Skinnysloth said:
I've got good news for those wanting to control the voltage without having to buy a new power supply.

I had one of these lying around and figure I would try to see if they worked. Disregard the cat fur. :)
291jjx1.jpg

15fjhft.jpg


The dimmer connectors fit with the pump controller and the original power supply. I was able to ramp them from off to what I would assume would be 24v.

You can buy one of them for about $5 off ebay from a US shipper. From China, they are about $3-4. I'm not going to post a link because I don't want this thread to get closed, but just do a search for '12v 5a dimmer' and you should find a similar one.
Click to expand...

So what exactly does this do? Give you the ability to turn the flow of the pump up or down manually?
 
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