bigal_scorpio
Active Member
Seasons greetings to all,
I have just rediscovered in my bits box a clock IC from long ago, brand new in its box!
It is an RS 307-115 LED clock IC and as I need a clock to fill a hole in the car I thought I'd build one.
The datasheet for the IC states one of its uses as "automobile clocks" so I figured it would be straightforward building, but then I hit a snag! The schematic shows the IC having an input from 50/60hZ from the mains. How do I get that in the car? Especially as accurate as the mains frequency is?
Any help appreciated. BTW I have attached the datasheet as its an old RS chip that was probably made before some of you were born!![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Al
PS if anyone has a better or easier idea for a car clock (4 or 6 digit) then by all means suggest it.
I have just rediscovered in my bits box a clock IC from long ago, brand new in its box!
It is an RS 307-115 LED clock IC and as I need a clock to fill a hole in the car I thought I'd build one.
The datasheet for the IC states one of its uses as "automobile clocks" so I figured it would be straightforward building, but then I hit a snag! The schematic shows the IC having an input from 50/60hZ from the mains. How do I get that in the car? Especially as accurate as the mains frequency is?
Any help appreciated. BTW I have attached the datasheet as its an old RS chip that was probably made before some of you were born!
Al
PS if anyone has a better or easier idea for a car clock (4 or 6 digit) then by all means suggest it.