MSI frequency counter

[kadomori]

may alam pa po kayong ckt ng frequency counter na MSI, bukod po dun sa given circuit sa microcontroller book by douglas hall?? patulong naman po, kasi sinubukan po namin yung ckt dun sa multisim tas di gumana, pa suggest naman po ng ibang circuit

[motion55]

may alam pa po kayong ckt ng frequency counter na MSI, bukod po dun sa given circuit sa microcontroller book by douglas hall?? patulong naman po, kasi sinubukan po namin yung ckt dun sa multisim tas di gumana, pa suggest naman po ng ibang circuit

Ano ba ang ibig mong sabihin ng MSI?

[kadomori]

Ano ba ang ibig mong sabihin ng MSI?

Medium scale integration



Dapat po hindi aabot ng Micro-controller Or PIC based yung IC namin and as much as possible walang CMOS, kaya po ba yun ?

[Ikasamoko]

more info please:

Analog ba or digital? Range?

Parang may nakita ako nyan using 555..

Encyclopedia of Electronics Circuit 6 yata..

microcontroller book by douglas hall

PERO

Dapat po hindi aabot ng Micro-controller Or PIC based yung IC namin and as much as possible walang CMOS, kaya po ba yun ?

WEIRD....

[motion55]

WEIRD....

Exactly. That is why humingi ako ng clarification.

@TS,

Avoid using acronyms if possible para walang confusion.

MSI (medium scale integration) is a very old term. It is seldom used these days because even the simplest ICs, except TTL/CMOS 74xxx and 4xxxx devices, are almost all LSI (large scale integration) or higher. If you meant using these devices, sabihin mo na kaagad 74xxx TTL or 4xxx CMOS devices. Wala na yung pa MSI-MSI pa.

Walang ako schematic right now for a frequency counter but it is quite easy to cook up one out of decimal counters, octal latches and 7 segment display drivers.

decimal counter -> octal latches -> 7 segment display driver and some timing logic.

 

[RaffT]

ayan may hint na.. googol mo na TS for schematics

[kadomori]

Exactly. That is why humingi ako ng clarification.

@TS,

Avoid using acronyms if possible para walang confusion.

MSI (medium scale integration) is a very old term. It is seldom used these days because even the simplest ICs, except TTL/CMOS 74xxx and 4xxxx devices, are almost all LSI (large scale integration) or higher. If you meant using these devices, sabihin mo na kaagad 74xxx TTL or 4xxx CMOS devices. Wala na yung pa MSI-MSI pa.

Walang ako schematic right now for a frequency counter but it is quite easy to cook up one out of decimal counters, octal latches and 7 segment display drivers.

decimal counter -> octal latches -> 7 segment display driver and some timing logic.

 

May schematic na po ako ng frequency counter and we're currently working on it..



ganito po sya.. may time base generator para sa isang input ng nand gate.. it composes of oscillators, frequency dividers, flip flops and controls for the reset and latch.. then dun po sa another input ng nand gate yung unknown frequency input signal



any suggestions po for latch and reset pag nareach na ng counter yung value ng unknown frequency signal





and yung about po sa input signal conditioning, okay lang po ba kahit hindi na lagyan?  yung unknown frequency signal ko naman ay square wave naman galing sa 555?




para sa lahat po yung tanong thanks, any help would be highly appreciated

[motion55]

ganito po sya.. may time base generator para sa isang input ng nand gate.. it composes of oscillators, frequency dividers, flip flops and controls for the reset and latch.. then dun po sa another input ng nand gate yung unknown frequency input signal Smiley)

any suggestions po for latch and reset pag nareach na ng counter yung value ng unknown frequency signal

Ang reset signal manggagaling sa time base generator. The same reset signal can be used to clock the latch. I think you don't need to gate the unknown clock. Hayaan mo pumasok sa counters. May reset at latch naman. Kung walang latch, then you have to gate the input (unknown) clock. But you can't count and display at the same time because nakikita ang pagbilang ng counter.

You can use any octal d-type latch. 74ls273, 74ls374, etc.