|Item Weight||3.52 ounces|
|Product Dimensions||1.3 x 1 x 0.8 inches|
|Item model number||90010|
|Manufacturer Part Number||090010|
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DROK Waterproof DC Buck Converter Voltage Regulator 8-22V to 1-15V 5V 12V 3A Adjustable Output Power Supply Transformer
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- Uses synchronous rectification technology, has high conversion efficiency and Stable performance; the input should be at least 3V higher than output
- With potentiometer on the bottom, which allows you adjust the accuracy with the mini screw, but ensures you won't easily change its setting when mounted
- Fully sealed, outer enclosure acts as a heat sink, specially Made to be waterproof, anti-shock, anti-humidity and dust-proof, more durable
- With reversed-connection protection, over-current protection, over-heating protection and over-voltage protection, hence is safe to use
- Perfect for electronic hobby project, wide application, you can use it on radio, car audio, LED display, motor, Cell phone, etc
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Module Name: DC buck module (Synchronous rectification)
Input voltage: DC 8-22V（22V Max）
Output voltage:1-15V (adjustable,please ensure input voltage is at least 3V higher than output voltage)
Output current: 3A Max. (long-term work in 2A doesn't need to enhance heat dissipation)
Conversion efficiency: up to 96%(Max)
Static power consumption: about 12mA
Ripple output: About 100mV (12V to 5V/3A)
Operating temperature: -20 °c to +60 °c (Industrial grade), -40 °c to 80 °c (limit)
Min voltage margin: 3V
Dimensions: 33 x 25 x 20mm
Red wire: connect the red wire to positive pole of input(input +)
Yellow wire: connect the yellow wire to positive pole of output (output +)
Black wire: connect the black wire to negative pole of input or output(input- / output -)
1 x DC Converter Module
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The little pump draws such a small load that if I connect it directly to the panel the voltage stays about 22 V in full sun, which is too much for the 12 V pump motor.
I connected this before to cap the panel voltage at 12 V. At full sun the setting of the variable voltage output screw gave me about 10.3 V (down from 22V) and about 1 and 1/4 turns clockwise got it to 12.0 V exactly for the output voltage.
At the sun goes down, the panel voltage drops and eventually (of course) the voltage output from this device drops below 12V. When the sun is enough to have the panel over 12 V, this caps the output at 12 V or below and the pump works perfectly.
I do not know how long it may last, but out of the box it performs perfectly.
Before purchasing the Drok, I tried using a 12-volt power supply at the source end, but lost about 0.5 volts over the ethernet run, and the device was drawing up to 1.2 amps over the 23-gage wires. Not very efficient, and pushing the limits of the 23-gage ethernet cable.
I replaced the 12-volt power supply with a 19-volt laptop power supply, connected the Drok at the other end of the ethernet cable and set it to 12-volts, and connected it to the device to the Drock. The result was much less current over the ethernet wires and a much more stable, reliable source of power to the device. The steady-state numbers are...
Source end: 18.5-volts and 0.49 amps
Device end: 12-volts and 0.72 amps
Overall efficiency: 95%
NOTE: When I tested the Drok regulator without the ethernet wires, it had a transfer efficiency of more than 98% while supplying about 1.5 amps, and it didn't even get warm. So most of the above power loss is due to the long run of ethernet cable.
I thought at first that it was broken because turning the trim screw appeared to do nothing to the output voltage, but I found that I just had to keep turning and turning. I eventually got the trim down into the range where it would adjust the output voltage.
If anyone else runs into this "problem", don't send the unit back until you try turning the screw about 50 times in the correct direction. In this case, counterclockwise lowers the output voltage, and clockwise raises it.