use this diagram, I forgot to add a few things..
|
use this diagram, I forgot to add a few things..
|
R3 and R4 will give you some problem, this makes a great voltage divider but will give you false logic level.
Is this a Typo or those 220nf are 220uF?
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
something is weird in the way you hook Q3 and Q4
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
|
yea, no idea what i was thinking when i threw those together, I had it differently just read my notes wrong, really wrong... anyhow, look at this one
|
lol, forgot to hook up Q4.... anyways it should be connected to an LED.
|
really not liking the CAD software I am using, its tough to read.
|
Definitely better, but... Q1 and Q2 are not connected the proper way, the emitter should go to GND, I'll assume a lack of sleeping for this one
I would suggest few things
- add a 0.1uF capacitor at the regulator input
- assuming Q3 drive a relay (because i'm not sure of the symbol you're using), I would suggest, if at all possible to use a 12V relay, this will keep spikes far of the logic Vdd. OR, depending how much current your relay coil need, and if have tons of those, add a resistor in serie with the 12v line...
- D1 is a good idea as long as your load on J4 don't overload the maximum forward current, which is ~1A.
- Depending how much current and where your LED take it's voltage, you may don't even need Q4
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
Members who have read this thread : 0You do not have permission to view the list of names.
Posting Permissions
Bookmarks