The open-collector tag has no wiki summary.
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2answers
70 views
Simulate tach signal of PWM fan
I have a power supply that uses a PWM fan with 4 wires.
Wires: 12V (red), GND (black), PWM Control (brown), TACH Sig (white)
The fan speed is controlled by the PWM control wire (brown). Fan speed is ...
5
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1answer
148 views
Open collectors & 74LVC245
I am trying to interface a PS/2 keyboard to a MSP430 for a toy. The PS/2 keyboard runs off 5V, but the MSP430 microcontroller runs off 3.3V. So I have a 74LVC245 level shifter to convert between the ...
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3answers
252 views
Fast opto-isolation with open collector output without VCC
I have a two wire communication channel, with a data line and a ground line, with the data line being pulled high via a resistor on the receiving end. I am supposed to send information on this line by ...
2
votes
1answer
145 views
Do you have to set the TRIS register when using open collector outputs on Microchip microcontrollers?
I'm using a dsPIC33FJ series microcontroller from Microchip. It has dedicated open-collector outputs/registers.
I've read the documentation and it is extremely brief. Does setting the ODCx register ...
1
vote
2answers
237 views
PIC18F2550 I2C Open Drain?
As far as I have read, the I2C pins are Open Drain or Open collector, but in the PIC18F2550 the datasheet doesnt say anything about those pins, and even says they are a digital output if you select ...
4
votes
4answers
263 views
Using an open-collector output from one IC to trigger a level change on the input pin of another IC?
So my problem is simple: I have an IC that provides an output pin to alert you when some condition is met. The output pin is open-collector, high-impedance when active. I want to monitor this output ...
1
vote
2answers
634 views
difference between dry contact mode output and open collector output
We have a device which can work with dry contact input and a device which gives open collector output. Will it inter-operate?
Is there any difference between dry contact mode output and open ...
5
votes
1answer
607 views
Open Drain vs Open Collector
Is there a practical difference between Open Drain and Open Collector outputs, or are the terms used interchangably? If they are indeed different, what are the contexts where each is advantageous? My ...
