help in building a relay circuit.

[caramelz]

Hi everyone. I'm using a Takamisawa RY5W-K 5V DC relay. what do i need ? and i'm using a pic18f4520 microcontroller.

 

[ericgibbs]

Hi everyone. I'm using a Takamisawa RY5W-K 5V DC relay. what do i need ? and i'm using a pic18f4520 microcontroller.

hi,

The relay coil resistance is 165R at 5V , ie 30mA.

The max current I would draw from a PIC is 20mA, so you will require a transistor driver.

Do you need help with a simple circuit.?

E

EDIT:
Optional circuit.

 

[Mosaic]

Eric could u share that Relay spice file with me?

 

[alec_t]

You can easily do your own spice sim. If you haven't got a sim model for a relay just use a 165Ω resistor in series with ~100mH

 

[caramelz]

so Rout connect to Microcontroller chip or the MCU pin? i dunno how to differentiate which pins of the relay is the switch

 

[Mosaic]

Use pins 8 & 6 as a normally open switch.
Can u read schematics?

I don't understand the difference between microcontroller chip and Mcu pin here. The Mcu pin IS the microcontroller chip interface.

 

[caramelz]

And what is V2?? thanks!

 

[be80be]

V2 is the 5 volt DC voltage used in place of the mcu to test the spice model.

 

[caramelz]

so what pins of the relay is connected to Rout and positive of the coil?
Cos the main purpose of the relay is to design a battery charging system whereby i'm able to read the voltage from the each battery(total of 8).

 

[ericgibbs]

Eric could u share that Relay spice file with me?

hi,
Sign up for the free **broken link removed**

It has many libs for different devices,, look under Files/Lib

E