Hi. I'm drawing up a circuit for a closset lamp, not unlike the fridgedoor alarm. This may sound trivial sure, but I have to consider it to be drawing low power the closset door is left accidentally open.
This is what I want:
- door closed, doorswitch cuts battery connection, null power.
- door opens, a led-strip is on for 1minute (accuracy not important).
- door accidentally left open, hopefully the circuit will draw low power.
So I've looked at CMOS 4093, quad nand schmitt triggered gates.
The quiesent supply current is very nice in the sub micro amps for 5V supply, but what I don't understand is the near 1mA output currents (?) as noted in the datasheet. Could someone explain this to me ? How do I read the I_OL I_OH in the electrical characteristic part of the datasheet? 1mA is not low-power if this is to be run by 4x AA battery.
http://www.farnell.com/datasheets/89030.pdf
My circuit is preliminary, and has some error with direction of D1 or C1/R1 switched places..
This is what I want:
- door closed, doorswitch cuts battery connection, null power.
- door opens, a led-strip is on for 1minute (accuracy not important).
- door accidentally left open, hopefully the circuit will draw low power.
So I've looked at CMOS 4093, quad nand schmitt triggered gates.
The quiesent supply current is very nice in the sub micro amps for 5V supply, but what I don't understand is the near 1mA output currents (?) as noted in the datasheet. Could someone explain this to me ? How do I read the I_OL I_OH in the electrical characteristic part of the datasheet? 1mA is not low-power if this is to be run by 4x AA battery.
http://www.farnell.com/datasheets/89030.pdf
My circuit is preliminary, and has some error with direction of D1 or C1/R1 switched places..
Attachments
-
107 KB Views: 26
Last edited: