Voltage Doubler using NE555 timer
Hi guys! I'm just wondering if this schematic I made through EAGLE CAD is the same as the one posted at http://www.elecfree.com/electronic/volt ... th-ic-555/
I find the schematic posted at the said website unclear enough.
Thanks.
I find the schematic posted at the said website unclear enough.
Thanks.
- modman
- a d m i n
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Also have a look here:
viewtopic.php?f=13&t=80&
viewtopic.php?f=13&t=80&
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- JiM
- Diode Debunker
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There shall be no connection between C4 and the output voltage ! You're shorting it to Vcc, defeating the purpose of the circuit.
I agree it's not easy to see in the original schematic that there is NO dot where these wires cross ...
I agree it's not easy to see in the original schematic that there is NO dot where these wires cross ...
I only give negative feedback.
- earthtonesaudio
- Transistor Tuner
Ah! Good call, JiM. I glanced here earlier but failed to spot that! I agree, C4 should connect to the main supply only, not to the boosted voltage. It would be even better to show it directly across pins 1 and 8 of the 555, because it should be as close as possible to that IC in the board layout.
One more thing, it wouldn't hurt to add the typical .01u cap from pin 5 (CV) to ground.
One more thing, it wouldn't hurt to add the typical .01u cap from pin 5 (CV) to ground.
rocklander wrote:hairsplitting and semantics aren't exactly the same thing though.. we may need two contests for that.
what does the 0.01 uf cap do to the timer?earthtonesaudio wrote:Ah! Good call, JiM. I glanced here earlier but failed to spot that! I agree, C4 should connect to the main supply only, not to the boosted voltage. It would be even better to show it directly across pins 1 and 8 of the 555, because it should be as close as possible to that IC in the board layout.
One more thing, it wouldn't hurt to add the typical .01u cap from pin 5 (CV) to ground.
- earthtonesaudio
- Transistor Tuner
Reduces noise/false triggering when using a bipolar 555. It may not be necessary, but it wouldn't hurt anything to include it.
rocklander wrote:hairsplitting and semantics aren't exactly the same thing though.. we may need two contests for that.