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  1. E

    automatic measurement and compensation of glucose level

    Deal all I need to realize a system which measures continously blood glucose level with a biosensor, and then activate an insulin pump when the level is low or high etc. For that I am thinking to use a microcontroller to read the sensor and then send a signal to pump (or a valve to open and...
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    read NFC signal from a glucose sensor

    Thank you I think I will create a new poste about what i need. Bests regards
  3. E

    read NFC signal from a glucose sensor

    Dear all, I have a glucose sensor (Free style Libre- from Abbott) which can measure the glucose level of blood and send the data directly to my iphone ( via an application). The data is sent by NFC singal to my iphone. Now for some reasons I need to read the data myself with a computer and to...
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    connect high power signal to oscilloscope?

    Thanks alot, I wanted just to be sure to do not burn my scope :) but in fact since there is internal resistance of 1M ohm, thats very fine for me. Thank you again and bests regards
  5. E

    connect high power signal to oscilloscope?

    Hello Sorry if the question is too basic for some of you. I have a voltage (10V ) but with current about 5 A. Therefore the power of this signal is 50W. I would like to know if I can connect it to the oscilloscope to see it? I am afraid to break something? And can I also see the current...
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    Industrial voltage divider

    Thank you. very interesting. Simply I think that since the industrial world are using +24 Volts to control motors, actuators, sensors etc. And some microcontrollers and processors are +5V TTL. I am a bit upset to see that there are no quik-install dividers on the market. So either there is a...
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    Industrial voltage divider

    Thank you. Yes in fact I dont need high currents. I need only few mA. I would like to control a TTL micro-controller with a force sensor . The force sensor output signal is digital +24 V. So I would like to convert it to TTL (digital 0 /+5V) in order to connect it to my micro-controller. Thats...
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    Industrial voltage divider

    Thank you for your answer. Yes in fact I may use a quick circuit using regulators you suggested to me. Bests regards
  9. E

    Industrial voltage divider

    Dear all, I need a simple voltage divider circuit to convert +24 V into +5 V. I can easily do that by building a circuit using 2 resistances. I would like to know if there are industrial dividers for this purpose. I am searching for a possible quick insallation DIN rail divider to do that...
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    Power rate of D'sub DB 25 cable

    Dear all, I have a cable Dsub Db 25 like this one. https://www.distrelec.ch/fr/pb-305-10-cable-sub-db25-maxxtro-pb-305-10/p/12530098?q=cable+d-sub+25&page=1&origPos=1&origPageSize=50&simi=95.12 I would like to use this cable to control a sensor with digital signals. The voltage rate is 24...
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    Choice of the cable for motor driver

    Dear all, I would like to use a stepper motor and the vendor gave me a driver for this motor. The driver has an input to connect the motor on to it (this input is composed from 4 entrance : phase A, phase A', Phase B, phase B'). I know that I should use 48 V supply voltage for this driver and...
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    Parasit effect at the input port of a microcontroller

    Dear all, I have a problem with my microcontroller. My mircocontroller should perform certain job when the satuts of an input port (lets say PORTB.RB1) is set to 1. So if (PORTB.RB1==) { // do the job } My problem: sometimes I receive paraist effect on the port. In other words sometimes...
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    How to change the frequency of AC mains supply

    Thank you.
  14. E

    How to change the frequency of AC mains supply

    Dear all, I have a pump. this pump should be connected directly to the mains AC supply of our building to work. It means that the pump needs 220 V and 50 Hz frequency to work. Now I would like to change the flow rate of the pump. The flow rate can be changed by changing the supply freuqncy...
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    effect of humidity on a PCBs

    Thank you, Actually I have found a type of spray (varnish) that I can put on my PCB. It is a tropicalization varnish. So I will test it afterwards. I hope it will work better. Bests regards
  16. E

    effect of humidity on a PCBs

    Hello, Thank you for helping me. I have a PCB which works very good in normal conditions (20°C, low humidity). For some reasons I should use this PCB in a thermal chamber with relatively high degree of humidity. I figured out that some fucntions are not performed correctly. Can someone tell...
  17. E

    Connecting 2 different grounds related to 2 different voltage levels

    Dear all, I have a microcontroller (PIC) which I use to control : - A stepper motor using a driver circuit working on 5VDC - A force sensor working on 24 VDC The microcontroller controls both the motor and the sensor. I have connected the ground of the sensor, and the ground of my stepper...
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    Keypad interfacing to PIC contoller

    Is this meaning that the problem is mechanical rather than electrical? Can we put some filters somewhere to avoid this problem?
  19. E

    lcd display

    Usually in the data sheet of the LCD, there is all information about how to program it. Which type of LCD is? Is it Hitach HD44780 ? If yes there is a useful link: http://www.protostack.com/blog/2010/03/character-lcd-displays-part-1/
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    Is there any internal resistor for the digital I/O of my device?

    Thank you very much. So actually this 8 mA is the cuurent comsumption at the input pin. Bests regards
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