Testing the 111701, a cheap DC-DC booster module for Arduino

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The 111701 is a DC-DC switching booster module that can handle an input between 1 and 5V, and has a fixed output of 5V. It can be found on dx.com and it is the cheapest switching module of its kind I could find, currently priced at 1.47€. Unfortunately I couldn’t find any docs about this module, so here is some of my tests.

The first thing to know about this module is: never reverse the polarity. Things get really hot really fast.

Some specs I gathered:

  • Size: 2.6 cm x 1.8 cm x 0.6 cm
  • Input: 1-5V
  • Output: 5-5.36V (see below)
  • Max output current: rated for 600mA (unconfirmed, maximum I got is 420mA for now)

The board also has two screw mounts, not sure about the size (surely less than 3mm, probably 2.5mm). The screws are meant to mount a female USB connector. The board also offers D+ and D- pins for USB purposes; they aren’t wired to anything.

By using 4xAA batteries I measured an input voltage of 5.15V and an output of 5.36V. This might not be a problem depending on your need. Using a single AA battery (input 1.24V) yields a perfect 5.00V. Below is a chart of the input/output voltage I measured.

111701_grafico

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Peristaltic pump BABYFISH AB13 specs

peristaltica

  • Applicable power: DC6V ; Non-load current :100mA
  • Working current: 170mAh (?? measured 110mA @ 5V)
  • Working environment: temperature 0-40 ° C, relative humidity <80%
  • Flow direction: both ways
  • Flow range :MAX 100ml / min (I measured around 30ml/min)
  • Motor size: Diameter 32 * Height 23 (mm)
  • Pump head size: 42*42*21(mm)
  • Standard pump tube: inner diameter 3* outside diameter 5(mm)
  • Product Weight: 65g
  • Hole pitch for set-up: 49mm
  • 24 hours soak test is recommened for pump tube before the use of acid / alkali medium.
  • Head: 5m above (vertical height)
  • Suction: 5m above (vertical height)
  • Minimum starting voltage: DC 2.5V
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6V Micro Submersible Water Pump Tests

DC 3-6V Micro Submersible Water Pump. Cheapest model I could find.
Some specs gathered around the web:
  • DC Voltage: 2.5-6V
  • Maximum lift: 40-110cm / 15.75″-43.4″
  • Flow rate: 80-120L/H
  • Outside diameter of water outlet: 7.5mm / 0.3″
  • Inside diameter of water outlet: 5mm / 0.2″
  • Diameter: Approx. 24mm / 0.95″
  • Length: Approx. 45mm / 1.8″
  • Height: Approx. 30mm / 1.2″
  • Material: engineering plastic
  • Driving mode: brushless dc design, magnetic driving
  • Continuous working life of 500 hours

Some specs I measured:

  • Requires about 500mA @ 5V when starting
  • About 150mA @ 5V working current
  • Minimum current about 50mA @ 5V

 

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