Greetings.
I have recently bought myself some electronic components, and have been testing out a 555-timer. Currently, I've hooked it up in monostable mode. The problem I am having, is that the pulse won't end.
Here's the schematics.
![555-timer.jpg 555-timer.jpg](https://www.electro-tech-online.com/data/attachments/42/42842-e450a9d582dd669059b4748592282688.jpg)
Now, if I understand correctly, once the voltage at 2 (trigger) drops below a third of the supply voltage, the pulse starts, and stops when the voltage at 6 (threshold) is greater than two thirds of the supply voltage (at 5, control).
If my calculations are right, the pulse should end in .01 seconds. Not much, but it's the biggest capacitor and resistor I have at the moment.
However, it doesn't. I've measured the voltage at 5 to be 8 volts, and 6 to be 10 volts. Still, it doesn't end.
What am I doing wrong?
edit: Also, if someone could point me to a program where I can make schematics on my PC, I would be grateful. Doing it with MS paint isn't too practical.
I have recently bought myself some electronic components, and have been testing out a 555-timer. Currently, I've hooked it up in monostable mode. The problem I am having, is that the pulse won't end.
Here's the schematics.
![555-timer.jpg 555-timer.jpg](https://www.electro-tech-online.com/data/attachments/42/42842-e450a9d582dd669059b4748592282688.jpg)
Now, if I understand correctly, once the voltage at 2 (trigger) drops below a third of the supply voltage, the pulse starts, and stops when the voltage at 6 (threshold) is greater than two thirds of the supply voltage (at 5, control).
If my calculations are right, the pulse should end in .01 seconds. Not much, but it's the biggest capacitor and resistor I have at the moment.
However, it doesn't. I've measured the voltage at 5 to be 8 volts, and 6 to be 10 volts. Still, it doesn't end.
What am I doing wrong?
edit: Also, if someone could point me to a program where I can make schematics on my PC, I would be grateful. Doing it with MS paint isn't too practical.
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