kris_maher
New Member
Hi guys,
I'm working on a project which is based around ultrasonic transducers.
I have a 9V battery which I was able to get down to 5V thanks to a voltage regulator whose wire is connected to the VCC pin (10) on my chip.
All the GND are grounded on the breadboard, pins 11 and 31 are connected firmly to ground
I checked with Multimeter and there's 5V across VCC as expected, and there's 5V across the RESET pin (pin 9) as expected and 2.5V each for XTAL2/XTAL1 (pins 12 and 13. These are related to the connection of external inverting amp etc).
I'm using an internal timer. My dilemma is that I've created a timer signal that oscillates at 100Hz sent to PORTB bit 0 (Pin 1). I have a buzzer connected to it along with the other wire of it to GND.
The buzzer beeps as expected on the development board but when I put the chip over to the breadboard when I check the voltages there's no voltage signal at all on pin 1 - it's only at 250mv and I need 3.3V min across pin 1 to drive the buzzer. When the ATmega32 chip is on the development board, there is a constant 3-4V across pin 1.
Even something as simple as an LED does not flash when the chip is on the breadboard and wires all connected, even though it does on the development board when connected to pin 1 and the other leg to ground.
Any ideas on why there's no voltage reaching pin 1 guys?
Thanks
PS: All wires are firmly connected and I checked several times against the datasheet's pin configuration diagram.
I'm working on a project which is based around ultrasonic transducers.
I have a 9V battery which I was able to get down to 5V thanks to a voltage regulator whose wire is connected to the VCC pin (10) on my chip.
All the GND are grounded on the breadboard, pins 11 and 31 are connected firmly to ground
I checked with Multimeter and there's 5V across VCC as expected, and there's 5V across the RESET pin (pin 9) as expected and 2.5V each for XTAL2/XTAL1 (pins 12 and 13. These are related to the connection of external inverting amp etc).
I'm using an internal timer. My dilemma is that I've created a timer signal that oscillates at 100Hz sent to PORTB bit 0 (Pin 1). I have a buzzer connected to it along with the other wire of it to GND.
The buzzer beeps as expected on the development board but when I put the chip over to the breadboard when I check the voltages there's no voltage signal at all on pin 1 - it's only at 250mv and I need 3.3V min across pin 1 to drive the buzzer. When the ATmega32 chip is on the development board, there is a constant 3-4V across pin 1.
Even something as simple as an LED does not flash when the chip is on the breadboard and wires all connected, even though it does on the development board when connected to pin 1 and the other leg to ground.
Any ideas on why there's no voltage reaching pin 1 guys?
Thanks
PS: All wires are firmly connected and I checked several times against the datasheet's pin configuration diagram.
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