logan_dslasher
- Jul 23, 2004
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- Jul 23, 2004
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thanks.. i have already asked my friend to purchase a CD4071 (quad 2-input OR gate) and a CD4081 (quad 2-input AND gate) he'll be at my place tomorrow.. i am planning to have it assembled in an illustration board.. i have a schematic circuit drawn in the board, drill holes for the LEDs and the IC's and at the other side, have the wires.. what is better to use, a switch or an alligator clip? he said that the power supply would be that from an AC/Dc converter.. probably 12V, right?
logan_dslasher
- Jul 23, 2004
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http://www.electronics-lab.com/forum/index.php?topic=627.0
Nice Project! is that limited for a 4011 only and some other 14-pin ICs? how about those with 16 pins? i noticed the stickers pasted on its chassis.. "4011, 4093 and 4001" are those the only ICs that can be tested by that project? anyway, i don't plan to build one, i'm just curious..
Nice Project! is that limited for a 4011 only and some other 14-pin ICs? how about those with 16 pins? i noticed the stickers pasted on its chassis.. "4011, 4093 and 4001" are those the only ICs that can be tested by that project? anyway, i don't plan to build one, i'm just curious..
the logic ic tester tested all those that are listed , and it was my prototype to and was really handy but now that ive upgraded it to a printed circuit version its not testing the 4001 and i think it may be because my 4001 ics are faulty i think they may be static sensitive and got damaged by it im not really sure , so ill get some new ones and try again as this teaster allways tested them ok before
logan_dslasher
- Jul 23, 2004
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i thought i got the whole thing figured out! ??? where would i put the LED? the supply? i am using a 4071 (OR) a 4081 (AND) and a 4069 (inverter).. the output X is = AB + B'
i have the inverter connected to input 2 of AND. outputs of AND and inverter are the inputs for the OR..
i got confused.. ??? i suspected that the breadboard im using is defective but i think there is something wrong with my wiring..
i have the inverter connected to input 2 of AND. outputs of AND and inverter are the inputs for the OR..
i got confused.. ??? i suspected that the breadboard im using is defective but i think there is something wrong with my wiring..
logan_dslasher
- Jul 23, 2004
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here's what i did..
i have a 4081 (quad 2-input AND).. pins 1,2,3 is AND1 456 is AND2 and so on.. pin7 is ground and pin14 is +9V.. I have a LED placed in pins 3&4 ('im really not sure if it should be placed there..) then I use two wires to connect pins 1 and 2 to pin14.. theoretically (my theory) is should have the LED lit. high input to pins 1&2 should produce a high, turning the LED ON, right? bu what happens is the opposite. the LED is OFF if both pins1&2 are connected to pin14' it is ON if only one is connected. what's wrong? please advise...
i have a 4081 (quad 2-input AND).. pins 1,2,3 is AND1 456 is AND2 and so on.. pin7 is ground and pin14 is +9V.. I have a LED placed in pins 3&4 ('im really not sure if it should be placed there..) then I use two wires to connect pins 1 and 2 to pin14.. theoretically (my theory) is should have the LED lit. high input to pins 1&2 should produce a high, turning the LED ON, right? bu what happens is the opposite. the LED is OFF if both pins1&2 are connected to pin14' it is ON if only one is connected. what's wrong? please advise...
i havent used the 4081 before so i have no idea on it but the decade counter itself , well the 4017 yes look in the forums somewhere for the ten led light chasser circuit i posted it may help you with some of the qestions as i used the 4017 decade counter ic in that with a 4011 i think it was you can make the leds stop to by shorting out the capacitor in that light chasser
logan_dslasher
- Jul 23, 2004
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hello steven!
can i wire it like this? i'll just replace the IC with 4081.. can i use up to 12V? what should be the resistor values then?
can i wire it like this? i'll just replace the IC with 4081.. can i use up to 12V? what should be the resistor values then?
4081 ic i dont know about the use of that ic ive not used it yet have you seen my 10 led light chasser yet in the forums somewhere it has a 4011 i think it was and 4017 ic and there was one i once biult that uses a timer and decade counter , the way you have it i cant give you any ideas on that as im not much of a technicle exsplanations type but audio guru and ante are they are good at the technicle exsplanations , but if you have a bread board you can try on that and the data on the chip you use if you find any will be helpfull . remember the decade counter can do ten leds hence the name decade counter, thats the 4017. pin 5 and 15 i think are the resett pins most of the other pins are outputs
logan_dslasher
- Jul 23, 2004
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thanks for the additional resources steven!
if i supply the circuit (
) with 12V, what should be the resistor values? i can't come up with a good schematic on how to wire the three IC's (4081, 4071, 4069)together.. ill try it on my breadboard later.. am still busy with lots of things right now..
thanks for the help!~!
if i supply the circuit (
thanks for the help!~!
logan_dslasher
- Jul 23, 2004
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hi guys.. i think i found an answer to my problem.. i was looking for the pin assignemnt of a 4081 and this turned up: http://www.doctronics.co.uk/4081.htm#pins
i just ha a question: what are the capacitor and transistor for? is it alright if remove them? and how about the unused gates? i thought they are supposed to be connected to something..
i just ha a question: what are the capacitor and transistor for? is it alright if remove them? and how about the unused gates? i thought they are supposed to be connected to something..
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