fantasymick
New Member
I'm working on a design project where some components (ie motors) need ~1A of current. But I've also got digital stuff on it that I don't want to exceed 200mA.
I've got only one source of power, from a 12V lead acid battery at 1.35A (ripped it off of an electric scooter).
I've got a 7805, connected directly to the battery to to drive the digital stuff. (The 7805 is getting kind of hot, I'm considering getting a 7809, and then connect the 7805 to it, is this a good idea?)
My question is, since the battery supplies this relatively high current, should I just connect it directly to the 7805 and drive the IC's? (I've tried it, and it works.)
My second questions is, if I do want to limit the current coming from the battery, what is a simple way to do it? ie. some chip I can just buy for the job.
Any suggestions my overall setup is also welcomed
Thanks.
I've got only one source of power, from a 12V lead acid battery at 1.35A (ripped it off of an electric scooter).
I've got a 7805, connected directly to the battery to to drive the digital stuff. (The 7805 is getting kind of hot, I'm considering getting a 7809, and then connect the 7805 to it, is this a good idea?)
My question is, since the battery supplies this relatively high current, should I just connect it directly to the 7805 and drive the IC's? (I've tried it, and it works.)
My second questions is, if I do want to limit the current coming from the battery, what is a simple way to do it? ie. some chip I can just buy for the job.
Any suggestions my overall setup is also welcomed
Thanks.