binkabir

hello all very unfortunate for :( i spent almost i week trying to design the circuit i downloaded from this site call time beeper and it didn't work. can any help me out ::) cos am down

i have successfully constructed the time beeper that was published in this web in fun anough IT DIDN'T WORK. could any help me out ???

hi i'm binkabir, i think we can makes thing better by use a common collect configuration of a transistor insteaded of the bulky transformer, all you need to do is to find the transistor that can work with that current and voltage at the output , this is easier cheaper and less bulky. ;D

i can answer the second question on parallel regulators: actually i can used them as you said but i will be wise if add a voltage double after each regulator. but that i not a good design technique. :-[ preferable you can use a power amplifier to increase the current gain and a buffer to isolate the LED from the circuit ;D

that's true but when you are looking for an advancment in terms of functionality and efficency 555 should be counted out. do you know the you can make 4060 an have 7 output with different ocsillating frequencies whereas the 555 can only utilize just one.

i have used both the 555 and the hcc4060b in designing of circuit and i found out that 555 is an out dated ic that really need not to be used EXCEPT FOR NEWBIE IN ELECTRONICS