maiksebben
Member
Hello everyone,
I spend the last 48 hours doing a lot of research on the 555 timer and other ICs that could resolve my issue, but due to my lack of knowledge I spent hours in front of several sites reading a ton, and ended up without a solution! The circuit might seem easy for most of you, but it isn't just available online, where it will function the way I need it. I know how to design PCBs, read schematics, and I understand the principles of electronics, but then again, I'm not experienced to that extend where I can come up with a circuit on my own. So if you can help, please do. I thank you all in advance.
The problem: I have a device (circuit with micro-controller, wifi module, etc) that is powered through a voltage regulator (12VDC or 24VDC on main power supply), and the device will run on 5VDC and draw max 3A (normally 2.5A). From time to time, this device needs a power reset (after running for 5 minutes: turn off, then a second or two later: turn back on).
The solution: A loop timer that will count to around 5 minutes, and then reset the power of the device. But with one condition, that I can reset the countdown on the timer, by sending a signal, preventing the device power from restarting.
On the prep board I was able to create a 555 timer astable circuit, and I was able to reset the timer using a signal as desired. The problem is that it worked on seconds, not minutes, I then learned this chip is not ideal for that length of time (5 minutes) so I gave up on that design. Also, I'm not sure if I was on the right path, but I was planning to use a mosfet to control the on/off state of the device. I know most of you are experienced enough to bring a solution, but I wanted to find a solution that does not involve using relays and/or a PIC where programming is involved.
Your help is VERY appreciated. If you can draw a schematic for me, I can take it from there. Again many thanks in advance. Mike
I spend the last 48 hours doing a lot of research on the 555 timer and other ICs that could resolve my issue, but due to my lack of knowledge I spent hours in front of several sites reading a ton, and ended up without a solution! The circuit might seem easy for most of you, but it isn't just available online, where it will function the way I need it. I know how to design PCBs, read schematics, and I understand the principles of electronics, but then again, I'm not experienced to that extend where I can come up with a circuit on my own. So if you can help, please do. I thank you all in advance.
The problem: I have a device (circuit with micro-controller, wifi module, etc) that is powered through a voltage regulator (12VDC or 24VDC on main power supply), and the device will run on 5VDC and draw max 3A (normally 2.5A). From time to time, this device needs a power reset (after running for 5 minutes: turn off, then a second or two later: turn back on).
The solution: A loop timer that will count to around 5 minutes, and then reset the power of the device. But with one condition, that I can reset the countdown on the timer, by sending a signal, preventing the device power from restarting.
On the prep board I was able to create a 555 timer astable circuit, and I was able to reset the timer using a signal as desired. The problem is that it worked on seconds, not minutes, I then learned this chip is not ideal for that length of time (5 minutes) so I gave up on that design. Also, I'm not sure if I was on the right path, but I was planning to use a mosfet to control the on/off state of the device. I know most of you are experienced enough to bring a solution, but I wanted to find a solution that does not involve using relays and/or a PIC where programming is involved.
Your help is VERY appreciated. If you can draw a schematic for me, I can take it from there. Again many thanks in advance. Mike