Relay control in bs1usb
Hi again guys!
Im using BS1USB in my project and i have a circuit of a relay and LED indicator. My problem is how to trigger the relay to light up the LED. I think my power supply from the BS1USB cannot trigger the relay. I try to separate the power supply of the circuit still not working.. hope you can help me.. thanks.
Im using BS1USB in my project and i have a circuit of a relay and LED indicator. My problem is how to trigger the relay to light up the LED. I think my power supply from the BS1USB cannot trigger the relay. I try to separate the power supply of the circuit still not working.. hope you can help me.. thanks.
Comments
Vdd from the USB port should be able to supply 100mA to drive a 5V relay. If you use a low current reed relay, you could probably drive that directly from a Stamp I/O pin. There are reed relays that have a 5V coil and turn on with as little as 20mA. RadioShack carries one for example.
If you have problems driving a relay and/or LED, you need to post your schematic. A brief description is not enough to get meaningful help.