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15 Volts
  • 719
  • 9
  • 16

Looks like all I needed is a 0.1uF capacitor I had lying around and connect them between the signal capacitor (Q3 in question) and +ve:

enter image description here

Now:

  1. It doesn't falsely trigger no matter how many times I touch the circuit
  2. No effect from EMI

As mentioned by @Tim Williams in comment, the bigger the value of the capacitor the longer you have to press the button and also longer activation time.

For example, I replaced the 100nF capacitor with a 1000uF capacitor, and here's what happens:

enter image description here

The activation time is also higher:

enter image description here

With a bigger capacitor (4700uF):

enter image description here

So for now the 100nF capacitor works perfectly and I ran the circuit for 12 hours straight without getting it latched.

Looks like all I needed is a 0.1uF capacitor I had lying around and connect them between the signal capacitor (Q3 in question) and +ve:

enter image description here

Now:

  1. It doesn't falsely trigger no matter how many times I touch the circuit
  2. No effect from EMI

Looks like all I needed is a 0.1uF capacitor I had lying around and connect them between the signal capacitor (Q3 in question) and +ve:

enter image description here

Now:

  1. It doesn't falsely trigger no matter how many times I touch the circuit
  2. No effect from EMI

As mentioned by @Tim Williams in comment, the bigger the value of the capacitor the longer you have to press the button and also longer activation time.

For example, I replaced the 100nF capacitor with a 1000uF capacitor, and here's what happens:

enter image description here

The activation time is also higher:

enter image description here

With a bigger capacitor (4700uF):

enter image description here

So for now the 100nF capacitor works perfectly and I ran the circuit for 12 hours straight without getting it latched.

Source Link
15 Volts
  • 719
  • 9
  • 16

Looks like all I needed is a 0.1uF capacitor I had lying around and connect them between the signal capacitor (Q3 in question) and +ve:

enter image description here

Now:

  1. It doesn't falsely trigger no matter how many times I touch the circuit
  2. No effect from EMI