324 Threads found on edaboard.com: Power Sensor
Unclear what you want to do with the card related to light and AC. The card has no buttons, so it can't be used as remote control.
A usual technique is to have a mechanical power switch activated for the room when the key card is stored in a respective holder. The operation is not specific to the type of card put in, and isn't needed to be.
Miscellaneous Engineering :: 03-29-2017 11:21 :: FvM :: Replies: 7 :: Views: 3580
I am working on a project that will meausre internal resistance of a lead acid battery. I know DC Load Test but my problem starts with Open Circuit Voltage(OCV). My batteries always connected to power source and i cannot switch my batteries and power source.
MY CONNECTION :
Analog Circuit Design :: 02-09-2017 22:50 :: yagizhanugur :: Replies: 10 :: Views: 653
I have a project where I need to make a Bottle Cap sensor which will Alert when the Cap is open. Can anyone advice whats the best way to do it. I thought about IR Tx-Rx based Proximity but it will consume more power where my project needs low power consumption. Also the bottle will be glass made transparent so I can not use LDR to (...)
Professional Hardware and Electronics Design :: 01-30-2017 22:11 :: sakibnaz :: Replies: 2 :: Views: 848
I want to use precision rectifier with hall effect sensor. At the output of the Hall effect sensor a capacitor is used to DC bias, which is then fed as input to precision rectifier.. The output of precision rectifier is Current_2 which is given to ADC (0-5V) of microcontroller. The circuit works fine.
I am using reactive loads like (fan, washing m
Elementary Electronic Questions :: 12-01-2016 07:13 :: engr.arfa :: Replies: 0 :: Views: 560
I am using a NPN type and PNP type inductive proximity and optical sensors in my project.
The sensor connections will be given at the customer end. Even after documentation and legend in PCB, I am afraid if the customers giving the wrong connection. Say example: power of sensor to signal in PCB likewise.
Hobby Circuits and Small Projects Problems :: 12-01-2016 05:57 :: Murugesh_89 :: Replies: 6 :: Views: 706
Read the freely available NFC standard to see how NFC works.
Minimum sensor size mainly asks for required coil dimensions and minimal sensor chip power requirements, NFC field strength range is given by the specification.
Which sensor size are you targeting?
RF, Microwave, Antennas and Optics :: 09-17-2016 08:31 :: FvM :: Replies: 1 :: Views: 439
If you can tolerate 500mW of power dissipation at 2A then choose a shunt value of:
R = P / (I x I) = 0.5W / (2A x 2A) = 125mOhms. (Or some other value in this range)
(Use a shunt rated for 1W at least, to avoid high shunt temperature)
This gives a 6 times better (higher) shunt signal than the 20mOhm shunt. Therefore offset errors have less
Analog Circuit Design :: 08-18-2016 06:42 :: KlausST :: Replies: 5 :: Views: 359
in my circuit, there are:
1. one CC2541, a SOC for BLE. it runs with a 32M and a 32.768K crystal oscillator;
2. one EEPROM(400K speed);
3. one OPA379;
4. one NTC (Temperature sensor)
i use OPA to amplify the voltage signal associate with NTC, then use CC2541 to convert that voltage signal to digital ,save the data in EEPROM and s
Analog Circuit Design :: 07-28-2016 16:00 :: Johnny_YU :: Replies: 0 :: Views: 278
I am begginer in WSN. S, I would like to know the technical specifications of wireless
sensor and maximum number of nodes needs to boots power, because i have a line of 100m and want to send data with low power consumtion.
2- I would like monitoring some caracteristics in this line, how much power do we need. (...)
Network :: 07-24-2016 05:55 :: re_michel :: Replies: 2 :: Views: 1036
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Business, Promotions, Advertising :: 05-14-2016 10:06 :: Ravindra Sinare :: Replies: 0 :: Views: 66
I use LTS 25-NP current sensor to measure ac current grid. I just built it. I tried to calibrate it using simple circuit consists of a single phase source and high power resistor. The current is flowing when I change the source voltage as appearing in the Ammeter but the output voltage from the sensor still 2.5 V ( 2.5 V means zero current (...)
Power Electronics :: 05-06-2016 13:57 :: anoman :: Replies: 4 :: Views: 1426
I'm designing a tilt sensor system. It is battery operated and thus has a limited life. I'm looking for a very low power accelerometer IC. I have seen LIS3DH from st microelectronics and ADXL series from analog devices, but dont know which one more economical in terms of current consumption. If anybody has worked on these devices or any other
Robotics and Automation Forum :: 04-13-2016 16:30 :: jayeshparmar :: Replies: 2 :: Views: 1195
Hi! Anyone know a method to access and control the Vcc and GND pins of a schmitt trigger inverter in LTSpice? I'm using a light sensor circuit to control an alarm circuit. But I can't connect the the light sensor circuit to the schmitt trigger in LTSpice
Software Problems, Hints and Reviews :: 04-08-2016 03:44 :: ADGAN :: Replies: 1 :: Views: 1147
Different touch sensor designs are more or less sensitive to 50 Hz hum and high frequent noise. So you should describe your touch sensor setup thoroughly.
I guess, grounding the power supply output would help against both possible interference sources. If you plan an isolated power supply, an Y-capacitor would at least (...)
Microcontrollers :: 02-25-2016 10:35 :: FvM :: Replies: 1 :: Views: 430
I have Nidec dc motor attached to it hall effect sensor to measure pulses. i connect 5 v to the sensor power terminal terminal 5 and 6 as in datasheet but there was no pulses output. please i need help. should i increase the VCC ?
Power Electronics :: 02-22-2016 13:31 :: mshh :: Replies: 0 :: Views: 13
Hello dear forum ,
I am an electronics engineer designing a 24 V DC motor driver circuit
I want measure the motor current with
However datasheet says it has 1.2 miliOhm conductor resistance
If I pass 50 amper through this ACS724
The thermal power will be 1.2miliohm *50*50 = 3W
My question is this ; this IC i
Power Electronics :: 01-16-2016 21:30 :: anotherbrick :: Replies: 5 :: Views: 1011
I'm pretty sure it will be the case that the winners will be
single chip on cheapo tag type construction, and the low
available power on distributed nodes (and drive to compact)
argue against discrete or SSI analog altogether. I expect
the key to wide deployment is the availability of various
sensor / actuator interfaces which can be integrated o
IoT - Internet of Things :: 12-28-2015 18:55 :: dick_freebird :: Replies: 5 :: Views: 1811
Looking to buy a HP power sensor. Preferably a 8483A. Anyone got one they are willing to part with or sale?
Business, Promotions, Advertising :: 12-27-2015 19:04 :: Zerotolerance :: Replies: 0 :: Views: 436
Yes, there are YSI datasheets. It's said that the maximum power dissipation should be 10 ?W.
Other Design :: 11-26-2015 22:41 :: FvM :: Replies: 1 :: Views: 4117
I have been asked to generate a 100Amp RMS precise sinusoidal current. It will have negligible burden/load.
Luckily I've done something very very similar in the past where I used a LEM sensor, a dsPIC33, an inductive load and made a current controlled PWM inverter based on a PI controller. It worked and I could inject any required current (sine,
Power Electronics :: 11-12-2015 13:36 :: chinuhark :: Replies: 46 :: Views: 3341
Would anybody know the R@S NRP Z91 power sensor 6 pin connector pinout. This is so that I can wire directly into test system. I have 50 sensors and this would save me around $10,000. If I can find out the 5V pwr in as a minimum then I can figure out the D+ and D- lines.
Power Electronics :: 11-05-2015 15:55 :: Munchie :: Replies: 0 :: Views: 383
ACS712 hall effect sensor to measure the DC current , with galvanic insulation
range 0-5A , 0-20A
ADC12 bits like MCP3304 4CH 12 bits for :
-Amps (analog signal from ACS712)
-temperature LM35DZ (0-50°C) 0 -500mV
use classic I2C protocole
or maybe a specialized device .. see LTC family power management & other s
Microcontrollers :: 10-26-2015 08:44 :: paulfjujo :: Replies: 1 :: Views: 575
I am going to design a single phase meter ( using shunt as current sensor ) which uses switching power supply like this schematic know it has transformer, but i doubt about C5 !
my measurement circuit us
Power Electronics :: 09-24-2015 16:48 :: hm_fa_da :: Replies: 3 :: Views: 648
I don't know about your particular application , but for pulse to pulse current monitoring we used CT Transformers and/or Shunt Resistors easily in our inverter welding machines.(power : 20KW Max)
We used shunt resistor in secondary (@ 500A Current) . These are typical 75mv/500A shunt resistors available widely and can be purchased easily.
Power Electronics :: 08-15-2015 11:55 :: memarian :: Replies: 22 :: Views: 1955
are you sure you want to detect darkness or loss of power or both?
The key aspects require the light sensor to be blocked from light from the LEDs and battery backup.
Analog Circuit Design :: 07-21-2015 03:03 :: SunnySkyguy :: Replies: 7 :: Views: 1074
How will you wire up the cars to detect they are connected?
Do you have DCC? or analog power on the tracks with polarity reversal?
A priority encoder is easy when all inputs are handy. You don't have any inputs yet.
How about magnet coupling sensor (Hall and magnet) when paired?
This idea is a bit thin to realize without more physical de
Hobby Circuits and Small Projects Problems :: 07-04-2015 02:58 :: SunnySkyguy :: Replies: 13 :: Views: 1200
Normally current shunts are in the range of 50 mV full scale for reliable readings. Copper shunt track width must be << main power tracks e.g. 30 mil. For 1A full scale, using a length of 0.5" 10 mil track of 1 oz Cu. gets you 49 mOhms within 10% or so your null offset and gain adjust can reach full scale with a gain of 100 to 5V or whatever.
Analog Circuit Design :: 06-22-2015 04:46 :: SunnySkyguy :: Replies: 9 :: Views: 761
If sensor or transceiver have separate transmit and receive antennas. Where does that additional sensitivity comes from?
Assume we have single antenna. If we want to do it without additional microstrip structures, most simple way to do mixing is to put 3-port tee power divider. First port - LO input, second port - sing
RF, Microwave, Antennas and Optics :: 06-08-2015 11:36 :: jiripolivka :: Replies: 1 :: Views: 627
I need to supply a noise DC motor using +5v of my sensor board PCB. I am using GND plane and +5v plane to in the PCB and I am afraid that the noise effect of this motor affect to these power planes or other components of the sensor board.
My question is of anybody knows about pcb layout technique to isolated the signals of (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 06-02-2015 08:19 :: flote21 :: Replies: 4 :: Views: 584
This camera kit has 2 parts: STM32F103RB main board and a OV7725 high speed CMOS camera sensor module. With this kit any one with a little electronics knowledge can make a camera in a few minutes. Just plug-in the camera module on the main board, power the board by USB cable or external power supply, the dynamic video will appears on the (...)
Business, Promotions, Advertising :: 04-29-2015 07:29 :: EzPCB-Nila :: Replies: 0 :: Views: 818
I am using an mpu6050 accelerometer+gyroscope sensor with a pic32 and I am getting large readings from the gyroscope whenever I plug in the power to my system.
The sensor readings are in 16 bit signed format and I get readings towards the far ends of the range (around -20k or 20k) when my device is static. The gyro readings seem to (...)
Embedded Linux and Real-Time Operating Systems (RTOS) :: 04-10-2015 19:26 :: ernpao :: Replies: 1 :: Views: 1085
I don't understand your question (and, apparently, neither do 61 other viewers). What do you mean "due to lower torque I am not able to use"? I also don't understand what kind of 'sensor' would draw 24 watts? That's more way power than your motors! Not a very efficient robot.
Basically, you need to restate your question. And how are you run
Robotics and Automation Forum :: 04-07-2015 16:14 :: barry :: Replies: 6 :: Views: 1263
if it has RS422 outputs, then you need a RS422 RECEIVER.
Any RS422 receiver should be able to receive the data.
Look for transmission speed, receiver side power supply voltage, receiver side data voltage level.
But these information the sensor´s datasheet can´t tell.
RF, Microwave, Antennas and Optics :: 04-07-2015 12:43 :: KlausST :: Replies: 5 :: Views: 655
We are now developing camera module for automotive for HD grade with LVDS solution.
We have done the camera module with image sensor and working fine.
When connect the image sensor module + DS90UB913A-Q1 and using power Over Coaxial, and link to DS90UB914A-Q1 + SoC board, the image sensor board cannot view and (...)
Analog Circuit Design :: 03-21-2015 08:07 :: kahjoo :: Replies: 0 :: Views: 691
Give the ACS712 any voltage output ?
You must get VCC/2 as output without any current .
VCC = power supply for ACS712
show your schematic
What is the range of ACS712 5Amps, 20Amps ?
do you want measure AC or DC current ?
Microcontrollers :: 02-27-2015 14:09 :: paulfjujo :: Replies: 2 :: Views: 609
You may try to put a decoupling capacitor across sensor power supply. What kind of sensor it is? (you may also put a small capacitor across sensor output)
Analog Circuit Design :: 02-21-2015 08:00 :: red_alert :: Replies: 14 :: Views: 1083
That is LED blinking. You want to control the power to Ultrasonic sensor module or what to send trigger pulse ? If you want to control the power to module then you have to use a relay, transistor or mosfer controlled by MCU.
Microcontrollers :: 02-11-2015 18:11 :: milan.rajik :: Replies: 2 :: Views: 642
Check the core temperatures with hwmonitor. If any sensor gives unusual read out, look into it. Another thing is the power supply, make sure it is not faulty or overheating. Does your motherboard has power LED onboard? does it turn off when the pc power of itself?
General Computer :: 02-02-2015 15:21 :: d3javu :: Replies: 3 :: Views: 2230
In a first order you should worry about the acceptable voltage/current/wattage of the sensor. It's no problem to chose a reference resistor with any required power rating, but exceeding the sensor's suggested operation conditions can cause measurement error or even sensor damage. What's the specification?
Analog Circuit Design :: 01-30-2015 11:58 :: FvM :: Replies: 7 :: Views: 542
You might have to use separate power supply for every sensor, depending upon your design.
Microcontrollers :: 01-04-2015 13:23 :: udayan92 :: Replies: 1 :: Views: 926
Hi I m using a Flexiforce FSR in my project. The circuit I use (link below) needs a -1V input to the sensor. I have power sources that can supply 5V and 12V. how can I generate a negative voltage for the sensor?
Analog Circuit Design :: 12-31-2014 03:13 :: thirumurugaad :: Replies: 2 :: Views: 617
what is your power supply voltage ?
show all your code ..
maybe your device is out of spec. or your code is not compliant for that.
Microcontrollers :: 12-24-2014 09:21 :: paulfjujo :: Replies: 6 :: Views: 1496
don't forget to use LATBbits.LATb3 for trig define
if you are using Pic18F.
Measure max less than 4M ?
Was is the power supply ?
i also tested HC-SR04 and get less than 3M. as maximum.
i think is a problem of power signal on sender part..
needs a hardware change to boost the signal
Materual comming from RPC are low cost
Microcontrollers :: 12-21-2014 09:25 :: paulfjujo :: Replies: 10 :: Views: 2075
Dear Friends ,
I have a circuit which works as following :
Mcu board :
reads temperature via pt100 sensor , shows temp on lcd and it has to print the data on a thermal printer .
Mcu board is working on linear power supply which powers voltage to pt100 circuit , mcu , lcd etc.
The thermal printer requires 5V , 2A of current so i am (...)
Microcontrollers :: 12-09-2014 01:52 :: jit_singh_tara :: Replies: 1 :: Views: 677
Hi every body ,
I have a problem about nuclear detection radiation . my sensor is RD3024 and the output is pulse . I use ext interrupt of microcontroller to read pulse from sensor . My board include Sim908 module more . When sim908 module dont powrt up, all things are ok . But if i power module sim908 then pulse continuos at output pin (...)
Microcontrollers :: 12-06-2014 19:16 :: haohaodk46 :: Replies: 5 :: Views: 1300
For your study you need a reference device like a lux-meter. From this you should calculate the light power incident on sensor area.
Your "harvesting" device specifications should tell you its receiving area, and the DC output from it will be a function of incident power and the rati of both areas.
Do your device specifications include (...)
Elementary Electronic Questions :: 12-06-2014 16:52 :: jiripolivka :: Replies: 4 :: Views: 1069
Beware of inductive noise causing ground shift as well as glitches coupling into sensor inputs. CM Chokes or ferrite beads help with low impedance braid or litz wire to motor and comparing effective series resistance (ESR) of power source and MOSFET with motor winding resistance. power Source ESR and ESL of wires should be much lower than (...)
Professional Hardware and Electronics Design :: 11-26-2014 05:40 :: SunnySkyguy :: Replies: 3 :: Views: 1056
An input temperature controlled attenuator may protect the amplifier.A sophisticated solution can be found with a simple heat sensor+control unit.
But moderm power amplifiers are protected against overload ( and temperature ) on relay based solution.When the heat rises up to limit value, the control circuit cut-off the supply voltage and the output
Analog Circuit Design :: 11-18-2014 16:36 :: BigBoss :: Replies: 12 :: Views: 1652
i tested this product , and i only get a maximum distance < 5M,
so think it can't reach a so long distance as 10Meters !
and it is not a probleme of software ..
but Ultrsaonic power on emitter device..
(or more sensitive on receiver)
Maybe we can Overdrive the emitter , with a power amplifier ?
Does someone test it successfully at th
Microcontrollers :: 11-08-2014 17:43 :: paulfjujo :: Replies: 4 :: Views: 1275
You can run the IA125P off 3.7 or battery directly.
The power Supply Rejection Ratio or PSRR is 100dB in the audio range, so no additional regulator is needed. The IA also has a precision 2.5 V ref builtin. For RF noise on cable to load cell, you may need ferrite choke around cable. If using 12V, you can scale output down to ADC input range with
Elementary Electronic Questions :: 10-26-2014 12:09 :: SunnySkyguy :: Replies: 6 :: Views: 894