I'm trying Bill Marsdens circuit (http://forum.allaboutcircuits.com/showthread.php?t=24028), but it dosent seem to work properly at 5V vcc.
Instead of the 9V battery I've put in a 7805. Also omitted R1, R2, D1, D2, C2. And C1 is changed to 0.1uF.
For the 7805 I got a 0.33uF on the input and a 0.1uF on the output.
Problem is the circuit only works between 30% and 100% duty cycle. But works perfectly fine with a 12V supply.
Instead of the 9V battery I've put in a 7805. Also omitted R1, R2, D1, D2, C2. And C1 is changed to 0.1uF.
For the 7805 I got a 0.33uF on the input and a 0.1uF on the output.
Problem is the circuit only works between 30% and 100% duty cycle. But works perfectly fine with a 12V supply.