Andrei IRL
Senior Member
Hi everyone and Happy Halloween.
Im working on a project which requires me to cut the spark to 4 ignition coils at the same time.
I would like to use pin PICAXE for this as im trying to make the final assembly as small as possible.
Is it possible to control 4 relays at the same time using single PIN?
The relays i have in mind are 5V coil voltage, they are cheep Chinese relays so i could not get my hands on the data sheet to check how much current coil draws.
I was hoping that if i used a transistor with 800mA output current (BC337 or similar) it might be enough to drive the 4 relays.
Or would i be better off using a larger PICAXE and have a separate pin for each relay?
The operation of the relays will only we for less then a second every time but could be as friquent as 5 operations in 10 seconds at a time.
Thanks very much in advance.
Andrei.
Im working on a project which requires me to cut the spark to 4 ignition coils at the same time.
I would like to use pin PICAXE for this as im trying to make the final assembly as small as possible.
Is it possible to control 4 relays at the same time using single PIN?
The relays i have in mind are 5V coil voltage, they are cheep Chinese relays so i could not get my hands on the data sheet to check how much current coil draws.
I was hoping that if i used a transistor with 800mA output current (BC337 or similar) it might be enough to drive the 4 relays.
Or would i be better off using a larger PICAXE and have a separate pin for each relay?
The operation of the relays will only we for less then a second every time but could be as friquent as 5 operations in 10 seconds at a time.
Thanks very much in advance.
Andrei.