Devil's Triangle Drone Sequencer

PHOBoS · Posted: Mon Jan 25, 2021 8:47 am Post subject:

note that if you do want to use a dual supply, 2x 12V is too high for this circuit. For the opamps it's not a problem
but the 555, 4017, 4066 won't be happy with it. I am not sure if a 7906 (negative 6V regulator) is easy to find but
you could use an 7805 and 7905. In that case a 6V AC wallwart would suffice.

c1rcu1t · Joined: May 04, 2020 Posts: 10 Location: EU

PHOBoS · Posted: Mon Jan 25, 2021 12:04 pm Post subject:

if you add a pot after the capacitor you don't need the resistor anymore, but you could add an extra resistor in series to limit the maximum level.
The 1nF will work as a low pass filter making it a bit less harsh though it would be better with a resistor in series.
see: http://sim.okawa-denshi.jp/en/CRlowkeisan.htm