-->
Page 1 of 3

esp8266 + uln2003+relay schematic

PostPosted: Fri Oct 16, 2015 1:15 am
by rajbadri
Hi
i have made this on a pcb and its working ok. now i want to add a fuse on 230v . Can anybody guide me where i should add the fuse for protection.

Thanks
esp8266-uln-relay_bb.jpg

Re: esp8266 + uln2003+relay schematic

PostPosted: Fri Oct 16, 2015 1:57 am
by alonewolfx2
uln2003 driving direct 230v? is it right?

Re: esp8266 + uln2003+relay schematic

PostPosted: Fri Oct 16, 2015 5:28 am
by rajbadri
if uln2003 is not right please recommend what to use

Re: esp8266 + uln2003+relay schematic

PostPosted: Fri Oct 16, 2015 8:02 am
by martinayotte
alonewolfx2 wrote:uln2003 driving direct 230v? is it right?

I hope not, since ULN2003 or ULN2803 are rated for 500mA/50VDC maximum. Also, they are driving DC not AC.
It should only drive the relay coil with DC, which I hope in this case is lower, something like 12VDC or 24VDC.