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Miscellaneous Sensors


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  1. USB Weather Board

    USB Weather Board


    We take the sensitive SCP1000 barometric pressure sensor, match it with a sensitive SHT15 humidity sensor, and we give you weather over USB! Ok, so it doesn't really predict the weather, but you can immediately tell what the current pressure, humidity, and temperature is. Graphed over time you can watch weather fronts move in and the rain come down.

    Serial output is a single visible ASCII string at 9600bps.

    There is a footprint and switch for 'RF'. This unit can be powered from our large solar cell and data can be transmitted via our BlueSMiRF wireless modem! All you need now is a greenhouse to monitor.

    • Powered over USB or externally
    • Absolute barometric pressure accurate within +/-150 Pascal
    • Relative humidity accurate within +/-2%
    • Temperature accurate within +/-0.3 degrees C
    • Serial output 9600bps 8-N-1
    • Measurement rate of 1Hz
    Learn More
  2. Potentiometer Sensor Board

    Potentiometer Sensor Board


    This handy little board is an easy way to provide an adjustable input voltage to your robot controller. Typical uses include LCD brightness adjustment, or timing adjustment of peripheral devices (such as spark advance).

    A small Phillips head screw driver can be used to adjust the on-board potentiometer.

    The sensor board has three inputs: Vin, Vout, and Gnd, and requires a Vin of +5V. Vout represents the reading of the potentiometer, which has a range of 0-5V DC.

    There are two holes along the periphery of the board to allow for rigid mounting to your robot or experiment.

    The kit includes stainless steel screws & aluminum standoffs to easily bolt the potentiometer board to your robot base or experiment.

    Learn More
  3. PIR Motion Sensor

    PIR Motion Sensor


    This is a simple to use motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that period, the 'alarm' pin will go low.

    Red wire is power (5 to 12V). Brown wire is GND. Black wire is open collector Alarm.

    This unit works great from 5 to 12V (datasheet shows 12V). You can also install a jumper wire past the 5V regulator on board to make this unit work at 3.3V. Sensor uses 1.6mA@3.3V.

    The alarm pin is an open collector meaning you will need a pull up resistor on the alarm pin. The open drain setup allows multiple motion sensors to be connected on a single input pin. If any of the motion sensors go off, the input pin will be pulled low.

    The connector is slightly odd but has a 0.1" pitch female connector making it compatible with jumper wires and 0.1" male headers.

    Documents: Datasheet Learn More
  4. Color Light Sensor Evaluation Board

    Color Light Sensor Evaluation Board


    The ADJD-S371 is a great little sensor. This evaluation board provides all the necessary support circuitry to actually play with the sensor!

    Dimensions: 0.6x0.9" Learn More
  5. ACS712 Low Current Sensor Breakout

    ACS712 Low Current Sensor Breakout


    Out of stock

    This current sensor gives precise current measurement for both AC and DC signals. These are good sensors for metering and measuring overall power consumption of systems. The ACS712 current sensor measures up to 5A of DC or AC current. We added an opamp gain stage for more sensitive current measurements. By adjusting the gain (from 4.27 to 47) you can measure very small currents.

    The ACS712 Low Current Sensor Breakout outputs an analog voltage that varies linearly with sensed current. To calibrate, first set the output offset to the desired level (with zero current on the sense lines, read output with a DVM). Then with a known current input (a 100mA limited supply works well for this), set the output deflection with the gain pot. Sensitivity is then calculated as (Vref - Vdeflect)/(current input).

    The bandwidth on the ASC712 Low Current Sensor Breakout has been set to 34Hz to reduce noise when using at high gains. The full 80KHz bandwidth that the sensor is capable of can be recovered by removing C1. See schematic for more details.


    Learn More
  6. ACS712 Breakout

    ACS712 Breakout


    This is a breakout board for the fully integrated Hall Effect based linear ACS712 current sensor. The sensor gives precise current measurement for both AC and DC signals. Thick copper conductor and signal traces allows for survival of the device up to 5 times over-current conditions.

    The ACS712 outputs an analog voltage output signal that varies linearly with sensed current. The device requires 5VDC for VCC and a couple of filter capacitors.

    • x05B (5 Amp) version
    • Low noise analog signal path
    • Device bandwidth is set via the FILTER pin
    • 5us output rise time in response to input current
    • 80kHz bandwidth
    • 1.5% output error at 25 degrees C
    • 1.2mOhm internal conductor resistance
    • 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8
    • 5.0 VDC, single supply operation
    • 66 to 185 mV/A output sensitivity
    • Output voltage proportional to AC or DC currents
    • Factory-trimmed for accuracy
    • Extremely stable output offset voltage
    • Nearly zero magnetic hysteresis
    • Ratiometric output from supply voltage
    ACS712 Datasheet Learn More
  7. Humidity and Temperature Sensor - SHT15

    Humidity and Temperature Sensor - SHT15


    This is a simple breakout board for the SHT15 humidity sensor from Sensirion. The SHT15 digital humidity and temperature sensor is fully calibrated and offers high precision and excellent long-term stability at low cost. The digital CMOSens Technology integrates two sensors and readout circuitry on one single chip.

    These sensors are really impressive! Very sensitive and straight forward to use. Board comes assembled and tested with the SHT15.


    • 2 factory calibrated sensors for relative humidity & temperature
    • Digital 2-wire interface
    • Precise dewpoint calculation possible
    • Measurement range: 0-100% RH
    • Absolute RH accuracy: +/- 2% RH (10...90% RH)
    • Repeatability RH: +/- 0.1% RH
    • Temp. accuracy: +/- 0.3¡C @ 25¡C
    • Fast response time < 4 sec.
    • Low power consumption (typ. 30 µW)
    • Low cost
    • High precision sensor at low cost
    • Leading CMOSens Technology for superior long-term stability
    • Precise data logging
    • Transmitters
    • Automation & process control
    • Building control and HVAC
    • Test & Measurement
    • Medical
    Learn More
  8. AttoPilot Voltage and Current Sense Breakout - 45A

    AttoPilot Voltage and Current Sense Breakout - 45A


    This is a small voltage and current sense PCB. DC current is determined by measuring a voltage drop across a pair of parallel shunt resistors, then converted to a final analog voltage output by the TI INA-169. Voltage sense is accomplished by scaling to 3.3V ADC range by a precision resistor divider.

    The PCB is supplied without leads or connectors. The pad sizes are large enough to accommodate 12 gauge heavy duty leads (see datasheet) but care must be exercised in soldering. Smaller gauge leads are considerably easier to solder without creating shorts. Learn More


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