Author Topic: Cheezeball DC Load: DL24P: Pump, or Dump ???  (Read 544 times)

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Offline frogblender

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Cheezeball DC Load: DL24P: Pump, or Dump ???
« on: September 20, 2020, 01:59:08 pm »
Anyone have the DC Load shown in the pic?  If so, please post your thoughts.

$42USD delivered, 180W, 200V, 20A, full-disco LCD display, low-voltage cutoff,  bluetooth connection to bug-ridden app.  What else could one want?  Seems great to me.

https://bit.ly/2ZVbN8x

 

Offline No.15

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #1 on: September 20, 2020, 02:02:25 pm »
I had a similar one and it let the magic smoke out on the third use
 

Offline Grandchuck

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #2 on: September 21, 2020, 09:20:41 pm »
I have one and can report mixed feelings about it.  The software is useless.  The current is noticeably jittery at low values in CC mode.  However, it is sometimes handy to have around.  The photo shows the external temperature sensor being used to monitor the heatsink of the switching FET of the power supply.
 
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Offline interflexo

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #3 on: September 27, 2020, 06:12:02 pm »
I had plans to use it (proof of concept only) at half the max power in a computer USB controlled project.

The USB/Bluetooth reported voltage, capacity and temperatures lack the screen resolution.

The remote setup is achieved by emulating the user interface button clicks. You can't use the buttons long press modes to access or change some parameters. You can't inquire any of the programmed settings or where is the cursor blinking. It's like trying to configure the unit by hand but using a blindfold. Who in his right mind would release a product like this?

The unit has an internal and an external NTC.

There is a new unit available with added remote voltage sense.
https://de.aliexpress.com/item/1005001458325206.html?spm=a2g0o.productlist.0.0.3822ccf1zniWmj&algo_pvid=219f12ff-32b4-4855-bf41-41d5690f1ee2&algo_expid=219f12ff-32b4-4855-bf41-41d5690f1ee2-7&btsid=0bb0623116012052587916854ed059&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
« Last Edit: September 27, 2020, 06:18:21 pm by interflexo »
 
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Offline frogblender

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #4 on: October 08, 2020, 08:03:49 pm »

There is a new unit available with added remote voltage sense.
https://de.aliexpress.com/item/1005001458325206.html?spm=a2g0o.productlist.0.0.3822ccf1zniWmj&algo_pvid=219f12ff-32b4-4855-bf41-41d5690f1ee2&algo_expid=219f12ff-32b4-4855-bf41-41d5690f1ee2-7&btsid=0bb0623116012052587916854ed059&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

Do you have any experience with this newer revision?   The fact that these guys are coming out with newer revisions is a good sign.  Any idea about reflashing latest firmware?
 

Offline frogblender

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #5 on: October 08, 2020, 08:11:20 pm »
I had a similar one and it let the magic smoke out on the third use
Apparently there's a design flaw where voltage spikes above 20v get onto the fet's gate, blowing it up.   You can probably fix permanently with a new fet and a 15v zener.  https://syonyk.blogspot.com/2018/06/the-atorch-purple-fan-mosfet-destroyer.html
 

Offline frogblender

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #6 on: October 08, 2020, 08:21:06 pm »
I have one and can report mixed feelings about it.  The software is useless.  The current is noticeably jittery at low values in CC mode.  However, it is sometimes handy to have around.  The photo shows the external temperature sensor being used to monitor the heatsink of the switching FET of the power supply.

Couple of quick questions, if you could:
1) Once it hits the low-voltage-cutoff and turns off.... does it stay off (at least until user intervention)?   Earlier versions apparently hit the cutoff, turn off, but then turn back on as soon as the voltage drifts back up above the cutoff (which every battery known to mankind will do)

2)  Is there any output on this thing that can be used to switch a relay ?   I want a battery tester that'll discharge a battery down to my specified cutoff, then switch in a charger or my choosing.  I know this is alot to ask....


 

Offline frogblender

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #7 on: October 08, 2020, 08:23:24 pm »
I have one and can report mixed feelings about it.  The software is useless.  The current is noticeably jittery at low values in CC mode.  However, it is sometimes handy to have around.  The photo shows the external temperature sensor being used to monitor the heatsink of the switching FET of the power supply.
Hey, wait... were you making a wisecrack here?  "It is useless, unless you only need a cheap thermometer, in which case it's handy to have around!"
 

Offline Grandchuck

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #8 on: October 09, 2020, 12:40:17 pm »
I have one and can report mixed feelings about it.  The software is useless.  The current is noticeably jittery at low values in CC mode.  However, it is sometimes handy to have around.  The photo shows the external temperature sensor being used to monitor the heatsink of the switching FET of the power supply.

Couple of quick questions, if you could:
1) Once it hits the low-voltage-cutoff and turns off.... does it stay off (at least until user intervention)?   Earlier versions apparently hit the cutoff, turn off, but then turn back on as soon as the voltage drifts back up above the cutoff (which every battery known to mankind will do)

2)  Is there any output on this thing that can be used to switch a relay ?   I want a battery tester that'll discharge a battery down to my specified cutoff, then switch in a charger or my choosing.  I know this is alot to ask....

1)  It stays off.
2)  No output for that.
 
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Offline duckduck

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Re: Cheezeball DC Load: DL24P: Pump, or Dump ???
« Reply #9 on: October 09, 2020, 06:30:17 pm »
Anyone have the DC Load shown in the pic?

I had the 150W version (ATORCH DL24). I did not test its accuracy, but it seemed to function OK. Build quality seemed decent enough. I didn't ever use the PC software or Bluetooth. It was very handy for seeing which USB chargers are decent and which are crap. I did some unnecessary surgery and destroyed it. You might consider making a case for it. It's pretty easy to damage the bare PCB if you are not careful. I paid US$26 plus a couple of bucks for shipping. I don't know that I'd pay US$42, but then I just bought it to play with.
 
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