.:madworm:.'s photos with the keyword: buck

Buck regulator - current

Buck regulator - current

.:madworm:.
20 May 2015 202
KIS-3R33S breakout

KIS-3R33S breakout

.:madworm:.
20 May 2015 238
Buck regulator - switching noise

Buck regulator - switching noise

.:madworm:.
20 May 2015 1 305
Vertical scale: 20mV/div - 10x probe.
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 155
Testing...
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 164
Be careful when removing the legs.
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 163
Got rid of most of the silicone rubber.
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 188
Popped the cap
Finished KIS-3R33S board

Finished KIS-3R33S board

.:madworm:.
31 May 2012 192
Current consumption in power-down mode is about 60µA.
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 200
Modified to output 4.5V instead of the standard 3.3V. The most useful "manual" for this device is currently this one. Maybe I will add a blog post about it, which may be around for longer.
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 144
Silly-cone thermal compound. Not terribly hard to remove, but it is annoying.
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 155
All legs gone
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 171
Missing legs
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 146
These step-down modules are currently available on ebay for about 40¢ per piece (pack of 20). Input voltage 5V-23V output a bit lower. 3A continuous current, 4A peak. They DO require an additional output capacitor to run stably.
KIS-3R33S

KIS-3R33S

.:madworm:.
31 May 2012 153
These step-down modules are currently available on ebay for about 40¢ per piece (pack of 20). Input voltage 5V-23V output a bit lower. 3A continuous current, 4A peak. They DO require an additional output capacitor to run stably.
Step-down converter

Step-down converter

.:madworm:.
29 May 2012 176
It is pretty efficient. Drop out voltage is about 0.5V at light loads. Only the trimmer is a bit strange. It's really unwilling to turn without force. Maybe I'll replace it some day.
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