You are in your final year at a university? And you or your teacher don't know about simple and common electronic circuits?bidex said:i have no knowledge of circuits
I don't believe it. A nooby in high school knows this easy stuff.
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You are in your final year at a university? And you or your teacher don't know about simple and common electronic circuits?bidex said:i have no knowledge of circuits
I proudly exercise my second amendment right to bear arms in this wonderful country (USA!!!). Fortunately our founding fathers were not ignorant enough to believe that carrying a firearm means that you must be trigger happy, or otherwise irresponsible. Do you carry wrenches and other handtools around with you? If so, do you wander around town removing lugnuts from the wheels of cars, or removing most of the screws from handrails? Could make for a funny movie, but only a complete idiot would really do it.bidex said:as for HItech and audioguru we learn from our mistakes but if everyone concluded all americans are gunslingers will that be right?
The outputs of a 4017 are not strong enough to drive a resistor as low as 220 ohms. It is the same as a short. Use 10k.bidex said:I forgot to put the base transistors they are of 220ohms each is this good enough?
With a 15V supply, the output of the 555 will swing up to +12.5V and down to +0.5V for 12V p-p. That is only 400mW RMS into 45 ohms at the fundamental frequencies.Also at the ouput i did not amplify with a transistor anymore i just connected it to a 45ohm loudspeaker via a 47uf capacitor but the sound is not very clear
Each transistor needs a 10k resistor in series with its base to limit the base current.bidex said:Ad,i think you mean five 10K resistors each connected to the base of each transistor but i want to be sure.
Q1 will turn on by itself, Q2 and Q4 will turn on together because they are connected together and Q3 and Q5 will also turn on together.both transistors will come on simulteneously with this
If the pins on the transistors are connected properly then they have a high current gain so a small input current through the 10k base resistor results in a high collector to emitter current.i thought the current will be too small for such values.
Yes, but the diodes do not allow the 4017 to turn off the transistors. A 100k resistor to ground is needed to turn off the transistors.What i want to confirm is that connecting the transistors as ie noe for each transistor base and not just three form the counter outputs will make both Q2 and Q4, Q3 and Q5 On at the same time when their respective counter outputs are HiGH hence no switching problems?
The 10k resistors are correct.bidex said:thanks,but where do i put the 100k resistor and how many?at the emitter of Q4 and Q5 to ground?or where.
Because i noticed what i think u are imlying;when Q2 and Q5 comes on in seems to remain On and affect the other sounds.