hello everyone. I am building a circuit for the umpteenth time, but dont understand the v+/2 in this circuit. How will i get 1/2 the voltage or is it just stating that 1/2 the voltage will be here. Please see attached
Why not the cap AK? I think I've seen a cap used all the time.If you don't have a spare section, replace with 51K coming from V+/2 with two 1000K resistors, one to V+ and one to GND.
Do *not* add a decoupling capacitor to the juction of the three 10K resistors and the + input.
ak
Because unlike the 2nd schematic in bertus' post, your right opamp is acting as a comparator, not a linear amplifier. The plus input is the trip point for the comparator to change states, and must move "instantly" when it does so to effect the hysteresis effect.Why not the cap AK? I think I've seen a cap used all the time.
There were two typos in my post, both corrected now. I meant to say two 100K resistors (not 1000K), and later it was supposed to be three 100K resistors, the original feedback 100K and the two you add to form Vcc/2.What are the three resistors (10K)?
Gracias AK. Crystal clear now.Because unlike the 2nd schematic in bertus' post
There were two typos in my post, both corrected now. I meant to say
ak
Don't think so. The thevenin equivalent resistance of the divider (in your case 1.65K) directly affects the amount of hysteresis and therefore the amplitude of the triangle wave.You can use one of Bill's excellent circuits or you can probably do very well by making a voltage divider with a pair of resistors, say 3.3k or so.
by Don Wilcher
by Duane Benson