Circuits & Schematics: meter - 6

51. Using the SPIRIT1 transceiver with range extender under EN 300 220 at 169 MHz
    Circuits Wireless Application Notes STMicroelectronics SPIRIT1
    .. when using the SPIRIT1 with a range extender under EN 300 220-1 (v2.3.1, 2012-02) in the 169.400 - 169.475 MHz band, meter reading, tracking and tracing applications. The maximum allowed output power in this sub-band is +27 dBm (500 ...
    Nov 22, 2013

52. MSP430 Powerscope - A Low Power Aid
    Circuits Measurement Microcontrollers Usage
    .. Power Scope is a meter intended for use on a breadboard to aid in the development of battery-operated devices. It provides dedicated ...
    Aug 13, 2013

53. AVR frequency meter - from 1Hz to 10MHz
    Circuits Measurement Microcontrollers Usage Atmel ATtiny2313
    .. meter with some of quite good performance, capable of measuring frequencies from 1Hz to 10MHz (9,999,999 Hz) with a ...
    May 17, 2013
54. Photo meter assesses ambient light
    Raju Baddi
    Circuits Measurement
    .. will produce usable results at a low cost. Figure 1. If the simplest version is required, use an inexpensive volume-unit meter to replace the 0- to 100-uA meter. Three LEDs are used; experimentation will indicate which device has the ...
    Apr 16, 2013
55. Use a transistor and an ammeter to measure inductance
    Raju Baddi
    Circuits Measurement
    .. switch. At the start of the on time, S 2 and S 3 are closed, biasing Q 1 on from the 5.5V power rail, and the diode and meter disconnect through S 1 and S 4 . After the current in the inductor under test, L X , has exponentially reached ...
    Feb 24, 2013
56. A DIY indoor thermometer plus hygrometer with adaptive brightness control implemented to 7-segment LED displays
    Circuits Measurement Microcontrollers Usage
    .. LEDs that automatically adjust the brightness to be in balance with the light condition in the room. So, if you put this meter in your bedroom, you won’t have to worry about turning it off during nighttime. It will automatically dim ...
    Jan 18, 2013
57. Use a transistor as a heater
    Circuits Automation
    .. a simple on/off-type control circuit in which an LM35 , IC 1 , is the temperature sensor, whose output a DPM (digital panel meter) can display. IC 2 compares the voltage that VR 1 sets with the output of the LM35 to turn on Q 2 accordingly, ...
    Jan 15, 2013
58. Thermocouple Temperature Meter
    Circuits Measurement Microcontrollers Usage
    .. interface ICs that integrates the analog signal prosessing circuit. I built a pocket sized thermocouple temperature meter with it. Foto 1. Thermocouple Temperature Meter Principles Seebeck effect When apply a temperature gradient to ...
    Nov 26, 2012
59. A brief overview of Allegro ACS712 current sensor. Part 2 - Interface the sensor with a PIC microcontroller
    Circuits Measurement Microcontrollers Usage Allegro ACS712
    .. device were briefly discussed. Now we will use that theory to implement the ACS712 sensor to make a simple DC current meter. The analog output voltage from the sensor is measured through an ADC channel of the PIC16F1847 ...
    Nov 10, 2012
60. Volt/Amp/Watt meter on MSP430 LaunchPad
    Circuits Measurement Microcontrollers Usage Texas Instruments MSP-EXP430G2
    .. is a simple voltage and current meter that uses the Texas Instruments INA219 chip and Texas Instruments MSP430 LaunchPad Development kit . Voltage ...
    Aug 21, 2012

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