12-28-2019, 10:43 PM
Perhaps I should have reread some of this thread from a year ago.
The LM2596 based voltage bucker drops over 0.7v. 12.0v in 11.3v out max, Actually its more like 11.27v out max. Less max voltage out less maximum fan speed.
Since the ~150CFM rated flow of the silverstone fm181 fan already seems much less impressive than it once did, that loss of 0.73v compared to the XL4015 based bucker's 0.31v is much less desirable to this ventilation nerd.
The good news is the SS fm181 on the V bucker can slow the fan way more than the SS fan's built in speed controller ever could, for marginally less amp draw yet significantly less airflow on minimum speed, which can be quite desirable in the cooler seasons.
More xl4015 based buckers to arrive tomorrow with the 140mm 233 cfm semi cloned delta fan.
Looks like my removing the 10k ohm trimpot of the lm2596 bucker, and adding wires for a remote pot, was a waste of time, but I have gotten really good at getting wires in place of the pot. The trick is tinning them first, then cutting the tinned wire on a steep angle leaving a pointy tip, then putting the solder iron tip on the backside while pushing that pointy tip into where the legs of the pot once resided. A year ago i was using tiny drill bits in order to drill out the solder from the holes, then stick the wire through the holes then solder them and shittons of cursing and time was involved.
Soon the 120mm 190cfm Delta fans will replace the two remaining In service Jaro's, and the 140mm Delta clone will replace the failed 140mm Noctua. When a 24v Papst fan replaces the SS Fm181, then perhaps, maybe, I might be able to stop pursuing this van interior as a windtunnel insanity.
The LM2596 based voltage bucker drops over 0.7v. 12.0v in 11.3v out max, Actually its more like 11.27v out max. Less max voltage out less maximum fan speed.
Since the ~150CFM rated flow of the silverstone fm181 fan already seems much less impressive than it once did, that loss of 0.73v compared to the XL4015 based bucker's 0.31v is much less desirable to this ventilation nerd.
The good news is the SS fm181 on the V bucker can slow the fan way more than the SS fan's built in speed controller ever could, for marginally less amp draw yet significantly less airflow on minimum speed, which can be quite desirable in the cooler seasons.
More xl4015 based buckers to arrive tomorrow with the 140mm 233 cfm semi cloned delta fan.
Looks like my removing the 10k ohm trimpot of the lm2596 bucker, and adding wires for a remote pot, was a waste of time, but I have gotten really good at getting wires in place of the pot. The trick is tinning them first, then cutting the tinned wire on a steep angle leaving a pointy tip, then putting the solder iron tip on the backside while pushing that pointy tip into where the legs of the pot once resided. A year ago i was using tiny drill bits in order to drill out the solder from the holes, then stick the wire through the holes then solder them and shittons of cursing and time was involved.
Soon the 120mm 190cfm Delta fans will replace the two remaining In service Jaro's, and the 140mm Delta clone will replace the failed 140mm Noctua. When a 24v Papst fan replaces the SS Fm181, then perhaps, maybe, I might be able to stop pursuing this van interior as a windtunnel insanity.
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