I am trying to make a double astable timing circuit like this one I made on LT Spice. It works fine on the computer, but when I made it on the breadboard the timing is all wrong. The power supply is 9v and the first timer triggers the second timer through the reset pin. After measuring the voltage at the trigger pin of the first timer, I found that it was going from 3V to 3.6V, when it should be 3v-6v. I tried testing the first timer by itself without connecting it to the second timer and it oscillates normally with the trigger pin ranging from 3v-6v. But once I power the second timer along with the first, it starts messing up again. After checking all my connections and even moving my components to another breadboard it still doesn't work. I then tried to see if the problem was my power supply. So I left my power supply connected to pin 8 of timer 1 and disconnected it from pin 8 of timer 2. I then powered timer 2 with a 9v battery and the circuit worked...So I'm guessing the problem lies in my power supply. The power supply I have is a 1.5 Amp regulated switching power supply that has worked fine so far for me(Although I did have a past problem with it in a similar 555 timer circuit). There also may have been a few times where my power supply may have been shorted out for a brief second or 1-3 seconds. What do you guys think? Do I need a new power supply?
Here is the link for my power supply https://www.amazon.com/Velleman-PSS...=8-1&keywords=velleman+switching+power+supply
Here is the link for my power supply https://www.amazon.com/Velleman-PSS...=8-1&keywords=velleman+switching+power+supply