Hi All,
I am new to this forum and am also quite a novice with electronics so the following question may be a rudimentary error on my part.
I have built a pretty simple circuit board to carry 5-off relays for use on my cnc milling machine. Everything seems to look correct and also simulates ok on my circuit building program but when I apply the 24V the relay coil immediatley energises.
I guess that this is down to a poor selection of the BC547B transistor as this is 'switch' that should logically stop the flow of electric to the relay coil.
The relay is an Omron G5LA 24VDC item with 15mA rated current and a coil resistance of 1600 ohms.
Any and all guidance would be greatly appreciated but please keep your terminology simple as, like I said, I'm pretty new to this.
thanks ...Richard
I am new to this forum and am also quite a novice with electronics so the following question may be a rudimentary error on my part.
I have built a pretty simple circuit board to carry 5-off relays for use on my cnc milling machine. Everything seems to look correct and also simulates ok on my circuit building program but when I apply the 24V the relay coil immediatley energises.
I guess that this is down to a poor selection of the BC547B transistor as this is 'switch' that should logically stop the flow of electric to the relay coil.
The relay is an Omron G5LA 24VDC item with 15mA rated current and a coil resistance of 1600 ohms.
Any and all guidance would be greatly appreciated but please keep your terminology simple as, like I said, I'm pretty new to this.
thanks ...Richard