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You mean, the cmos 555 doesn't have enough current to drive the loop of wire? I use power supply for my NE555, it works well.An LMC555 or TLC555 is a low power 555 made with Cmos. It doesn't have enough output current to drive the loop of wire around your room.
The output high current of a Cmos 555 is only 10mA. A regular 555 has 200mA.bananasiong said:You mean, the cmos 555 doesn't have enough current to drive the loop of wire? I use power supply for my NE555, it works well.
The max recommended supply voltage for your Motorola u-controller is 5.5V. To use a 9V battery you should use a low-dropout 5V regulator IC for it and for the LM393. An ordinary 5V regulator begins to fail when the battery is 8V and is like new. A low-dropout regulator works fine until the battery drops below 5.5V.if i want to share the circuits with the same source (LM393 and microcontroller) with 9V battery, do i need to make any changes?
But the microcontroller itself already has a voltage regulator (NOT 7805), so can i use a 9V battery to share them?The max recommended supply voltage for your Motorola u-controller is 5.5V. To use a 9V battery you should use a low-dropout 5V regulator IC for it and for the LM393. An ordinary 5V regulator begins to fail when the battery is 8V and is like new. A low-dropout regulator works fine until the battery drops below 5.5V.
oh, i've forgotten. It looks like a power transistor, with 3 pins, is a 5v regulator, but it is not a 7805.audioguru said:What is the part number of the voltage regulator used with your Motorola micro-controller?
Then we don't know if it still regulates the voltage when the battery voltage runs down. You could measure its output voltage when it is powered by a used battery.bananasiong said:oh, i've forgotten. It looks like a power transistor, with 3 pins, is a 5v regulator, but it is not a 7805.
Look at its datasheet!bananasiong said:I think it is a 78M05CT
Again, look at the datasheet!bananasiong said:But my microcontroller works well with 4*AA's batteries, and it still works when they drop to 4.8v.
Try it with the LM393 circuit powered by the output of the 78M05 regulator.bananasiong said:Okay.. back to the question: If i connect the microcontroller with the LM393 circuit in parallel to share the 9v source, do i need to make any changes?