Hi Swagatam, the 4069 square wave circuit I was
using originally has 2 Clock signals . The first signal comes out of Pin# 2 of
the 4069 goes to 10K resistor then to base of TR1. Part of that signal is
diverted back into Pin# 3 and inverted out through Pin# 4 and out the
other resistor and to base of TR2. Please correct me if I'm wrong.
to TR1. I did not use the inverted half coming out of Pin# 4 to
and I did not use TR2.
required to create a push-pull effect and make both the windings saturate
alternately. Only due to this function we are able to get complete AC cycles
at the output, so, it's better that we follow the original design only.
4069 circuit as per the Schematic I sent you. Ok ,so where the Clock
signal comes out of TR1's collector and TR2's collector, do I connect
those two points to the Clock Input connection on your circuit ?
& TR2 and connect them to the Clock Input connection on your circuit ?? Is
between the 4069 circuit and your PWM circuit. Here is a diagram of both
circuits, how do I connect the two outputs from TR1 & TR2 to the Clock Input
in your circuit ?
don't need the gate of IC 4069 with the pin 3 and 4, so take it out of
the scene, but remember to connect pin 3 to ground, just as pin 5 and
The clock output from pin 2 of IC 4069 now gets
disconnected from the transistor bases and goes to the clock input of
our 4017 ICs.
Finally the diode outputs from the two ICs 4017 now gets connected to the two transistor bases respectively.
That's it.... your modified PWM circuit is ready.
Thanks and Regards.