MP3Car.com - View Single Post - Headlight Controller (PIC-based)

Saab9-5 · 04-21-2005, 05:55 PM

Quote: Originally Posted by rando

This looks sweet!

Thanks. Especially coming from you with all the work you (and Seth, Racemeir, et al) are doing on the AM/FM radio project.

Quote: Originally Posted by rando

1) Could you use a PIC with a built-in resonator option to save a few parts?

Of course. I have a few of these from sample orders I've placed with Microchip. The design is very flexible, only requiring a PIC have: 1 analog input port, 1 serial port, 1 interrupt, 2 digital inputs, and 5 digital outputs.

Quote: Originally Posted by rando

2) Will the linear regulator draw an excessive amount of current while the car is off?

Won't know until I build it. My benchtop power supply has a display for current being drawn so I'll know then and tweak accordingly.

Quote: Originally Posted by rando

3) Current limiters at the PIC input/output ports connected to the opto-isolators?

I'll add those in. Thank you for the suggestions.

04-21-2005, 05:55 PM	#4
Saab9-5 Variable Bitrate Join Date: Mar 2005 Location: Ponta Delgada, Azores Posts: 228	Quote: Originally Posted by rando This looks sweet! Thanks. Especially coming from you with all the work you (and Seth, Racemeir, et al) are doing on the AM/FM radio project. Quote: Originally Posted by rando 1) Could you use a PIC with a built-in resonator option to save a few parts? Of course. I have a few of these from sample orders I've placed with Microchip. The design is very flexible, only requiring a PIC have: 1 analog input port, 1 serial port, 1 interrupt, 2 digital inputs, and 5 digital outputs. Quote: Originally Posted by rando 2) Will the linear regulator draw an excessive amount of current while the car is off? Won't know until I build it. My benchtop power supply has a display for current being drawn so I'll know then and tweak accordingly. Quote: Originally Posted by rando 3) Current limiters at the PIC input/output ports connected to the opto-isolators? I'll add those in. Thank you for the suggestions.