555 Timer circuit
Hi,
Sorry for the blurry video. I had the camera set wrong. Here are the 555CN timer parts values:
10k pot in series with a 1k resistor between pins 2 and 7
.1uf cap between pin 2 and (-) ground rail
10k resistor between pin 7 and (+) positive rail
220 ohm resistor between pin 3 and base of TIP3055 transistor
1N4001 diode (protection diode to save 555CN from back spike) on (+) rail leading to 3.7v /120v wall outlet transformer
The video is good enough to freeze frame the circuit diagram and make a sketch of how it is all hooked up.
These parts valuse were just guesses with my good friends Mr."Trial" and Mr. "Error" helping out.
The simple circuit was one I found somewhere to drive an car ignition coil to make HV and I modified it. It might be right or wrong for this application but it worked just fine. The light bulb was happy.
I will try to find a different transformer like what Tyson is using so I can get more light output. His 555 timer circuit might be better than mine also.
Lidmotor
Originally posted by dllabarre
View Post
Sorry for the blurry video. I had the camera set wrong. Here are the 555CN timer parts values:
10k pot in series with a 1k resistor between pins 2 and 7
.1uf cap between pin 2 and (-) ground rail
10k resistor between pin 7 and (+) positive rail
220 ohm resistor between pin 3 and base of TIP3055 transistor
1N4001 diode (protection diode to save 555CN from back spike) on (+) rail leading to 3.7v /120v wall outlet transformer
The video is good enough to freeze frame the circuit diagram and make a sketch of how it is all hooked up.
These parts valuse were just guesses with my good friends Mr."Trial" and Mr. "Error" helping out.
The simple circuit was one I found somewhere to drive an car ignition coil to make HV and I modified it. It might be right or wrong for this application but it worked just fine. The light bulb was happy.
I will try to find a different transformer like what Tyson is using so I can get more light output. His 555 timer circuit might be better than mine also.
Lidmotor
The 1.5 volt battery packs are charging up and the light is staying on. I have the amp draw way down at between 60 and 100mA. It is hard to tell if the system would run just as long or not if I just used the extra 8 AAs when the first set ran out. My rough calculations put the run time at around 2 days if I did it that way. As I write this the system has been running 29 hours. If it makes it past 48 hours then things get real interesting. I swap the batteries every 6 to 12 hrs. when I get around to it.
.How would one go about designing such a circuit
.Oh well,Please forgive me for my rambling off topic here.
.Peace out.
Comment