Recent content by tobi101

Thanks, and what would the 737-700 NACA number be?

Boeing 737-700 Wing size?? Just working on basic aerodynamics of a boeing 737-700, and need a more detailed description on the wing size, or area as the boeing site only supplies limited information which can be used to calculate general values such as speed (m/s). Can anyone help please?!

hi again, i was jus wondering why you used a 330uf capacitor in the circuit, and how did you come to choosing it?

thanks for the help. i got a transformer the only one available has an output of 24V, 250mA. Am i correct in sayin that a 220 ohm resistor will work for a 4v LED in this case? and what capacitor can be used? could the same one be used?

hi, thanks for your replies, you also wrote to me about the pulsating LED. I though about the transformer and found quite a small on to reduce the 230 to 6v, i just need guidence on how to choose a rectifier and a capacitor, as you said it makes the LED brighter, and the brighter the better...

If an LED is connected to a single rectifier, resulting in a half wave, will this cause the LED to pulsate?! I no a bridge-rectifier will work and is more efficient to keep the LED constantly on but can a single rectifier work? thanks

hi, im looking to connect a 230V AC to an 4V LED. i was suggested a thyristor could be used then a rectifier to convert AC to DC then using a resistor to drop the voltage to 4V. i dan't seem to understand how a thyristor can aid this process. Any suggestions, please help?

oh ok, i wasn to sure, i was jus came across it when researching a current sense transformer and thought it would be suitable. im still not to sure how it works and how it would work in this situation. i have very basic knowledge on electronics :( and it stands for write back :)

hey hey. me again...probably wrecking ur head at dis stage...but back on this topic, i was wondering is it possible and easier to use a UVLO to cut the power from a socket to an application consuming standby energy? wb please

awh ok, just abit of a risky thought :smile: . . .regarding the current sense circuit, In this case, would a Low side circuit be used?

ah that's good :). . .another thing, can metal oxide varistors be used, i seen that they are used in surge protectors to divert excess current to ground but could they be used to let a constant current pass while an application is being used and then prevent any current passing when the...

ye the IR controls make sense for convience but installing simple switch to the socket could reactivate its supply aswell, couldn it?

thank you :). . .but could you remove the microcontroller and replace it with another component that can acknowledge a voltage drop within the circuit and then divert it to the SSRs??

http://www.standby-saver.co.uk/ . . . this is basically the most popular devices available. Its used to prevent standby power consumption. i'd like to know what components are used to automatically turn the applications off when switched to standby. Thanks for your reply :) nd for the welcomin :)

im trying to understand the concept of how a stand by saver works, What components and how it is put together. any suggestions?