schematics
I have a schematic which is provided between the images. I was searching Google with no luck finding what does +Vs and -Vs mean. Also, on the schematic is a weird μP square. Even the guy in my local electronics couldn't identify it. Could someone explain these things for me?
Thanks.
7.2V at 1.2V per cell is a 6 cell battery.
9V at 1.5V per cell is a 6 cell battery.
It is most likely able to handle that range, so it can deal with NiCd/NiMH cell or standard Alkaline cells on battery powered instances.
Edit: Looks like this is a duplicate of what supercat posted in the comments. Sorry I missed that.
This is the figure referenced:
Also used on page 4:
That almost certainly means "trimmable" or "adjustable".
If it had an arrow head on the cross bar it would imply an adjustment that was potentially user (or service person) changed.
The T head usually means like a trim pot which is set for calibration purposes.
In this case it's inside the IC and you have no control over it (as far as I can see) - it may be LASER trimmed during manufacture? As you do not seem to be able to alter what it does it's not evident why they show it.
Here's an example of the T head used to show a trimpot adjustment.
Similar here but the T head is shown next to the resistor
Best Answer
+Vs is the connection for the positive voltage supply. -Vs is the connection for the negative voltage supply. "μP" is very, very commonly short for "microprocessor".