www.mbsm.pro , Embraco FG 75 HAK ,true cooler compressor, 1/4hp
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100ft QUAD SHIELD SOLID COPPER 3GHZ RG-6 Coaxial Cable 75 Ohm (DIRECTV Satellite TV or Broadband Internet) ANTI CORROSION BRASS CONNECTOR RG6 Fittings…
La fiche F, ou connecteur de type F (en anglais : Fconnector), est un : connecteur coaxial pour fréquences radioélectriques, avec verrouillage à vis, pour usage dans les systèmes de distribution par câble à 75 ohms.
Mbsm Pro , Images De Plage , Chebba , Mahdia , Tunisia , Août 2018
The LM317 is most commonly found in a TO220 package. It only has three pins and we will be using all of them in this tutorial.
The use of an LM317 as a constant current source comes right from the data sheet. The schematic below shows how to configure the LM317 as a current regulator. It is the value of R1 that you will be concerned about and that value is determined by the type of LED you are using.
The math is really simple. The factor of 1.25 also comes from the data sheet.
Let’s walk through an example:
Type Designator: IRF830
Type of Transistor: MOSFET
Type of Control Channel: N -Channel
Maximum Power Dissipation (Pd): 100 W
Maximum Drain-Source Voltage |Vds|: 500 V
Maximum Gate-Source Voltage |Vgs|: 20 V
Maximum Gate-Threshold Voltage |Vgs(th)|: 4 V
Maximum Drain Current |Id|: 4.5 A
Maximum Junction Temperature (Tj): 150 °C
Drain-Source Capacitance (Cd): 800 pF
Maximum Drain-Source On-State Resistance (Rds): 1.5 Ohm
Package: TO220
For the purposes of this tutorial, I am using motors specified at 6V where they draw approximately 130mA. I will choose transistors I happen to have in my parts box. If I didn’t have anything on hand that would work, I would buy something that could handle 2X the voltage and current.
It also has an internal diode of back-EMF protection.
The pin out of the IRF9530 if the same as that of the IRF830 – Gate = pin 1; Drain = pin 2; Source = pin 3 (when viewed from the front.)
D1 is an added external diode to offer the transistor back-EMF protection. It is not required when using a transistor such as the IRF830 because it already has an internal diode for the same purpose. It is shown here simply to show how it should always be connected when using a transistor without an internal diode. It will be omitted from future circuits unless necessary.
R1 is a pull down resistor to ensure a LOW signal to the gate unless it is specifically driven HIGH.
Connections: Drain to motor; Source to GND; Gate to control device.
J1 (the MOSFET gate) is typically connected to a micro-controller pin. A HIGH signal turns the MOSFET ON energizing the motor; a LOW signal turns the MOSFET OFF stopping the motor – LOW = motor OFF; HIGH = motor ON.
The advantage of this circuit is its simplicity; the disadvantage of this circuit is that the motor can only turn in one direction making it suitable for controlling a fan or pump, but, not for a reversible robot.
R1 is a pull up resistor to ensure a HIGH signal to the gate unless it is specifically driven LOW.
Connections: Drain to motor; Source to +V; Gate to control device.
J1 (the MOSFET gate) is typically connected to a micro-controller pin. A LOW signal turns the MOSFET ON energizing the motor; a HIGH turns the MOSFET OFF stopping the motor – LOW = motor ON; HIGH = motor OFF.
The advantage of this circuit is its simplicity; the disadvantage of this circuit is that the motor can only turn in one direction making it suitable for controlling a fan or pump, but, not for a reversible robot.
Depending upon desired motor response to specific logic levels, either of these circuits is well suited to function as described above.
Hisilicon Balong
Hisilicon Balong
Hisilicon Balong
Mbsm.pro, Retardateur d’ampérage de démarrage , Exécution de 3000 W sur un ampérage max 10 a
3000 w = 3000/220 v= 13.636 a
le but c’est démarrer une machine 3000 W sous un disjoncteur 10 A
10 A = 220 V * 10 A = 2200 W
3000 W – 2200 W = 800 w = 800 W /220 V = 3.636 A
Mbsm.pro , Testeur de câble , camera (bnc connecter) , USB, Rg45 , Rg11, Port 1394 , Produit tester, par mbsmgroup
Mbsm.pro, 1998 , la première foie, je touche, une disquette pc ,et j’installe un logiciel
Mbsm.pro ,Inverser la rotation, d’un moteur 9v Dc, avec DPDT Rely
Mbsm.pro ,Inverser la rotation, d’un moteur 9v Dc, avec DPDT Rely
Mbsm.pro ,Inverser la rotation, d’un moteur 9v Dc, avec DPDT Switch
Mbsm.pro ,Inverser la rotation, d’un moteur 9v Dc, avec DPDT Switch