Hello-
I have designed and built a Parallax SX28 microcontrolled circuit to drive a relay board for a project I'm doing. I've got everything installed and working in the truck. The SX28 protoboard I'm using has a voltage regulator circuit that suggests 6-9vdc input (specs say 6-30vdc). With that being said I hooked directly to the ignition source in the truck. It works, but at higher voltages(13-14.5vdc) I get some random glitches. I want to build a 9vdc(using a L7809CV) regulated power supply to power the board with constant voltage. Current is at 300ma max when circuit is fully loaded.
My questions are--
1- What is the best way to build the voltage regulator circuit?
2- Should I or can I use a diode bridge on the DC input voltage?
3- Do I just use the diagram that is in the L7809CV datasheet?
Thanks!!
Greg
I have designed and built a Parallax SX28 microcontrolled circuit to drive a relay board for a project I'm doing. I've got everything installed and working in the truck. The SX28 protoboard I'm using has a voltage regulator circuit that suggests 6-9vdc input (specs say 6-30vdc). With that being said I hooked directly to the ignition source in the truck. It works, but at higher voltages(13-14.5vdc) I get some random glitches. I want to build a 9vdc(using a L7809CV) regulated power supply to power the board with constant voltage. Current is at 300ma max when circuit is fully loaded.
My questions are--
1- What is the best way to build the voltage regulator circuit?
2- Should I or can I use a diode bridge on the DC input voltage?
3- Do I just use the diagram that is in the L7809CV datasheet?
Thanks!!
Greg