mattomatto
- May 18, 2016
- 8
- Joined
- May 18, 2016
- Messages
- 8
Hi all,
I'm trying to add some simple short-circuit protection to my design to make it safer. Some contacts are exposed which could potentially short, and I'm looking for an effective way to prevent that from damaging components or being dangerous.
I have attached a picture of a simplified schematic. The control board has three potentiometers attached to power and ground, with their wipers being read by a micro controller. The switch (sw) represent where the short-circuit could happen and the '?' is where I'm looking to place a solution.
I have looked into using a resistor in-line with the power (something like 10k so that it doesn't get too hot) however, this affect the potentiometer reading to the point where it is unusable.
I'm also looking at an opamp buffer based solution, but so far what I have tried has also had an effect on the potentiometer ready, perhaps because ether voltage output is never fully 3v, as the source supply is.
I hope that all makes sense and let me know if you need any more info. Help much appreciated!
I'm trying to add some simple short-circuit protection to my design to make it safer. Some contacts are exposed which could potentially short, and I'm looking for an effective way to prevent that from damaging components or being dangerous.
I have attached a picture of a simplified schematic. The control board has three potentiometers attached to power and ground, with their wipers being read by a micro controller. The switch (sw) represent where the short-circuit could happen and the '?' is where I'm looking to place a solution.
I have looked into using a resistor in-line with the power (something like 10k so that it doesn't get too hot) however, this affect the potentiometer reading to the point where it is unusable.
I'm also looking at an opamp buffer based solution, but so far what I have tried has also had an effect on the potentiometer ready, perhaps because ether voltage output is never fully 3v, as the source supply is.
I hope that all makes sense and let me know if you need any more info. Help much appreciated!