I am building simple PIC based PCB and I need proper power supply for it.
Can I use L78M05CV 500mA, 5V votage regulator?
Can I connect this IC like below schematics from datasheet shows?
Do I need any additional capacitors...? **broken link removed**
What about when starting the engine and turning on the hid lights?
Can these large consumers make any harmfull spikes for my MCU?
Do I need any additional electrolytic capacitor?
What about when starting the engine and turning on the hid lights?
Can these large consumers make any harmfull spikes for my MCU?
Do I need any additional electrolytic capacitor?
National Semiconductor makes/made ICs that interface with vehicle electrical systems, and in their application notes (somewhere online) they had a schematic for a workable transient suppression network.
You also might want to Google
"load dump transient"
The first thing I'd do is put a 1A, >600 PIV diode in series with the input of your regulator.
The necessary capacitance will change with 5v regs. If you look that circuit up, and find a similar-looking 5v reg at Radio Shack or whatever, it may require a very different capacitance.