Hi,
I'm using a LM555 timer to produce a frequency of 240KHZ & 50% duty cycle.
The circuit i'm using is Astable. (See **broken link removed**)
RA is 82ohm
RB is 200ohm
C is 0.01uF
RLs nothing
I built up this circuit and got nearly 240K frequency and 44% duty cycle
But when use a normal LM340T5 to produce a 5V to the LM555 timer...
The frequency immediately drop to 190KHZ
This cause my 3rd IC almost burn T^T
anyone can guide me to the solution?
Thanks
Best Regards
Wan Xi
P/S: Regulator Circuit See **broken link removed**
I'm using a LM555 timer to produce a frequency of 240KHZ & 50% duty cycle.
The circuit i'm using is Astable. (See **broken link removed**)
RA is 82ohm
RB is 200ohm
C is 0.01uF
RLs nothing
I built up this circuit and got nearly 240K frequency and 44% duty cycle
But when use a normal LM340T5 to produce a 5V to the LM555 timer...
The frequency immediately drop to 190KHZ
This cause my 3rd IC almost burn T^T
anyone can guide me to the solution?
Thanks
Best Regards
Wan Xi
P/S: Regulator Circuit See **broken link removed**
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