bryan1
Well-Known Member
Hiya Guy's
I'm on making up a parrallel port based cicuit board for my CNC project and when it comes to relays well I admit I'm pretty green as I haven't used them in the past. Below is a schematic of a transistor emitter follower to power the relay from a parrallel port pin. Now the relays I managed to get very cheap are NAiS ST1-DC48V SPDT relays that in my opnion would run fine of a 12 volt dc source after looking at the datasheet. But my main question is those relay's have a resistance of 9K so would this effect the those resistors and by the way I'll use a BC548 as they are compatible with the C8050 transistor. As I'm not sure I'm asking as I don't want to go and make big stuff up's and like I said I'm totally green with relay's.
Cheers Bryan![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I'm on making up a parrallel port based cicuit board for my CNC project and when it comes to relays well I admit I'm pretty green as I haven't used them in the past. Below is a schematic of a transistor emitter follower to power the relay from a parrallel port pin. Now the relays I managed to get very cheap are NAiS ST1-DC48V SPDT relays that in my opnion would run fine of a 12 volt dc source after looking at the datasheet. But my main question is those relay's have a resistance of 9K so would this effect the those resistors and by the way I'll use a BC548 as they are compatible with the C8050 transistor. As I'm not sure I'm asking as I don't want to go and make big stuff up's and like I said I'm totally green with relay's.
Cheers Bryan