T TKS New Member Apr 12, 2005 #1 I have not much expierience with this kind of stuff soow hope some one can help. They use in this schematic as Clock a 74HC00 well i have in stock a 74HC04N and an SN7407N can i use one of them?? and how do i need to hook it up? i have realy no idea how they work Regards, TKS Attachments cardclock.gif 9.5 KB · Views: 505
I have not much expierience with this kind of stuff soow hope some one can help. They use in this schematic as Clock a 74HC00 well i have in stock a 74HC04N and an SN7407N can i use one of them?? and how do i need to hook it up? i have realy no idea how they work Regards, TKS
T TKS New Member Apr 12, 2005 #3 ok, i don't study electronics, its a hobby from mine. but can you tell me if its possible with them?? do i only need to look at the symbols an look for the combination in the others? TKS
ok, i don't study electronics, its a hobby from mine. but can you tell me if its possible with them?? do i only need to look at the symbols an look for the combination in the others? TKS
T TKS New Member Apr 12, 2005 #4 Ok Is it true that i can use the 04 one?? the only difference is the quantity of pins i conect to the Crystal?? the 00 uses a & gate put outputs inverted the 04 is only an inverter.. but because of the fact that both are conected together the & isn't working soow is it true i can use the 04 one?? TKS
Ok Is it true that i can use the 04 one?? the only difference is the quantity of pins i conect to the Crystal?? the 00 uses a & gate put outputs inverted the 04 is only an inverter.. but because of the fact that both are conected together the & isn't working soow is it true i can use the 04 one?? TKS
Sebi Active Member Apr 12, 2005 #5 Use only one input of HC00 - this give smaller load - and connect the another input to Vcc.Be sure, the gate input connected to Xtalout pin.
Use only one input of HC00 - this give smaller load - and connect the another input to Vcc.Be sure, the gate input connected to Xtalout pin.
P Pommie Well-Known Member Most Helpful Member Apr 12, 2005 #6 What is the chip that is in the diagram? Mike.
T TKS New Member Apr 13, 2005 #7 uhhh its a well famous (not) Nut Chip??? I have hooked up it with my 74HC04 and he is giveing a cloksource to the card. but i stil have the feeling that there is a little difference.... because sometimes it works and sometimes not. (giveing acces to the main system) today will do some more testing with it. in the article also states that from the 74HC... its better to connect al pins to ground wich you don't use (inputs) is that true?? TKS
uhhh its a well famous (not) Nut Chip??? I have hooked up it with my 74HC04 and he is giveing a cloksource to the card. but i stil have the feeling that there is a little difference.... because sometimes it works and sometimes not. (giveing acces to the main system) today will do some more testing with it. in the article also states that from the 74HC... its better to connect al pins to ground wich you don't use (inputs) is that true?? TKS
Exo Active Member Apr 13, 2005 #8 Re: uhhh TKS said: its a well famous (not) Nut Chip??? I have hooked up it with my 74HC04 and he is giveing a cloksource to the card. but i stil have the feeling that there is a little difference.... because sometimes it works and sometimes not. (giveing acces to the main system) today will do some more testing with it. in the article also states that from the 74HC... its better to connect al pins to ground wich you don't use (inputs) is that true?? TKS Click to expand... Try it with a 40-series CMOS gate, to further decrease the load on the crystal, and yes all unused inputs should be connected to ground or V+. Floating inputs start 'toggeling' on their own causing switching currents.
Re: uhhh TKS said: its a well famous (not) Nut Chip??? I have hooked up it with my 74HC04 and he is giveing a cloksource to the card. but i stil have the feeling that there is a little difference.... because sometimes it works and sometimes not. (giveing acces to the main system) today will do some more testing with it. in the article also states that from the 74HC... its better to connect al pins to ground wich you don't use (inputs) is that true?? TKS Click to expand... Try it with a 40-series CMOS gate, to further decrease the load on the crystal, and yes all unused inputs should be connected to ground or V+. Floating inputs start 'toggeling' on their own causing switching currents.
T TKS New Member Apr 13, 2005 #9 any example chip?? pff i dunno looks like my incoming voltage is realy really dirty.. will check conections etc. TKS
any example chip?? pff i dunno looks like my incoming voltage is realy really dirty.. will check conections etc. TKS