Search found 33 matches
- Fri Jul 18, 2003 9:51 pm
- Forum: General Discussion
- Topic: mc4016
- Replies: 15
- Views: 8232
Re: mc4016
Greetings all; been a little busy latley with school etc.(I aced the silly little entrance exam!) no_vice ; I appreciate the offer, however I need to place a large order with a couple of supply houses anyway, I'll stock up on a few chips while I'm at it. stephen ; I think I was half asleep last time...
- Wed Jul 16, 2003 11:36 pm
- Forum: General Discussion
- Topic: mc4016
- Replies: 15
- Views: 8232
Re: mc4016
You mean you cannot preset a 0001 and get them to count down to zero? Where are you getting data for these devices? I could only find limited(very limited.) data sheets from digi-key's web site. Do you happen to have a copy of the TTL cookbook? mine is the 26th printing, if yours is similar, look on...
- Wed Jul 16, 2003 7:35 pm
- Forum: General Discussion
- Topic: mc4016
- Replies: 15
- Views: 8232
Re: mc4016
Damn stephen, you're good. I think I found an equally lazy way to achieve my silly little circuit though, a couple of CMOS 4018's, they are decade DOWN counters, which means simple hook-ups of a few BCD coded switches. However the data sheets were somewhat lacking, not explaining what the cascade pi...
- Tue Jul 15, 2003 6:50 pm
- Forum: General Discussion
- Topic: mc4016
- Replies: 15
- Views: 8232
Re: mc4016
No I don't have any, I was trying to keep the circuit as simple as possible, and the 4016's have look ahead capability built in(I.E. only reloading the preset number when all units that are cascaded together hit zero simultaneously.).
I'll come up with another scheme, I was just trying to be lazy.
I'll come up with another scheme, I was just trying to be lazy.
- Tue Jul 15, 2003 2:13 pm
- Forum: General Discussion
- Topic: mc4016
- Replies: 15
- Views: 8232
Re: mc4016
I was planning something along the lines of an N and only N pulser, using three 4016's along with some BCD switches to pre-load a number from 1 to 999, I thought it would be handy to be able to step clocked circuits through a selectable number. However @ fifty bucks(F@#$%^G ouch! :eek: ) a pop I thi...
- Tue Jul 15, 2003 12:17 pm
- Forum: General Discussion
- Topic: mc4016
- Replies: 15
- Views: 8232
Re: mc4016
desterline; Thanks for trying but see below.<p>Ron; the mc4016 is an MTTL device, not a cmos device. It's easy to confuse the two because they both have the 4016 in their part #'s. The device I'm looking for is a decade ripple down-counter, with presets.<p>[ July 15, 2003: Message edited by: IRONMAN...
- Mon Jul 14, 2003 10:26 pm
- Forum: General Discussion
- Topic: mc4016
- Replies: 15
- Views: 8232
mc4016
I need a detailed data sheet(s) for this chip A.K.A. the 74416, I have limited info about it from the TTL cookbook. Looked around, CANNOT find it, I assume its been phased out? Even so surely there is still info somewhere?
Thanks guys.
Thanks guys.
- Mon Jul 14, 2003 10:14 pm
- Forum: General Discussion
- Topic: ac/dc conversion and regulation
- Replies: 12
- Views: 6504
Re: ac/dc conversion and regulation
I understand that the supply is no more than 28 VAC, however when you rectify that 28 VAC with a bridge circuit and add a filter cap. you'll end up with very close to 40 VDC. Thats just about to much for a little 7805 to deal with. If you need any other voltages higher than 5 volts in the circuit, y...
- Mon Jul 14, 2003 2:42 pm
- Forum: General Discussion
- Topic: ac/dc conversion and regulation
- Replies: 12
- Views: 6504
Re: ac/dc conversion and regulation
Rebel: You really should use a different transformer, as stephen pointed out dropping 35-40 volts down to five is extremely inefficient, Think about it lets say your circuit uses 1/2 an amp(not unreasonable.), @ a forty volt input thats 17.5 watts of power wasted across the regulator! Give in and bu...
- Sat Jul 12, 2003 1:19 pm
- Forum: General Discussion
- Topic: ac/dc conversion and regulation
- Replies: 12
- Views: 6504
Re: ac/dc conversion and regulation
I agree with chris, the I.C. regulators are usually the cheapest most reliable way to go, however if you're talking about 24 VAC then be careful becuase when you run that through a bridge rectifier your out-put is about maximum for the 7805's input voltage(about 35 volts peak.), the higher the volta...
- Fri Jul 11, 2003 9:22 pm
- Forum: General Discussion
- Topic: WTB for friend: Cheap 12V 20A supply
- Replies: 10
- Views: 5841
Re: WTB for friend: Cheap 12V 20A supply
Go to E-BAY do a search for "12 volt power supply"
I saw several reasonable units.
I saw several reasonable units.
- Tue Jul 01, 2003 7:37 pm
- Forum: General Discussion
- Topic: 2.4 GHz vs. 900 MHz Phone Technology
- Replies: 20
- Views: 11350
Re: 2.4 GHz vs. 900 MHz Phone Technology
I don't know a whole lot about the newer rf technologies, but I allways assumed frequencys in the GHZ range would travel further(at least line of sight.). To be honest, after having known and talked to several "engineers" , some of whom could'nt even build an audio freq. amp for thier guit...
- Wed Jun 25, 2003 7:08 pm
- Forum: General Discussion
- Topic: MOSFET vs. Transistor
- Replies: 21
- Views: 8882
Re: MOSFET vs. Transistor
Ouch!! To be honest what you're wanting to do is both complicated and impractical, I'm not trying to be smart, it's just that what you require would be a tremendous amount of work if you built everything yourself, for instance you need voltages that are higher than the supply & you also need a n...
- Wed Jun 25, 2003 4:51 pm
- Forum: General Discussion
- Topic: MOSFET vs. Transistor
- Replies: 21
- Views: 8882
Re: MOSFET vs. Transistor
Question: what are you using as a source? I mean what are you getting your raw voltage from?
Sounds like you're wanting to use a car battery, is this correct?
Sounds like you're wanting to use a car battery, is this correct?
- Tue Jun 24, 2003 8:02 pm
- Forum: General Discussion
- Topic: MOSFET vs. Transistor
- Replies: 21
- Views: 8882
Re: MOSFET vs. Transistor
What you're trying to do is use a transistor in a series pass configuration to amplify the current capability of a regulator? I use to do that a lot, but I'm sure there are high current regulators on the market(why re-invent the wheel?), I originally thought you wanted to use mosfet in some kind of ...