Help needed on how to preset the CD4510 BCD up/down counter to any digits. I am looking for a 2 digits 7 segment count down timer circuit. Please help.
- posted
17 years ago
Presettable CD4510 BCD up/down counter
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- posted
17 years ago
Help needed on how to preset the CD4510 BCD up/down counter to any digits. I am looking for a 2 digits 7 segment count down timer circuit. Please help.
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- posted
17 years ago
Pulse pin 1 high????
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- posted
17 years ago
You would need two of them, and some dip switches or hardwired preset inputs to set the "count from" digit. Or if you want to get fancy - there are decimal thumb wheel switches that read the digit 0-9 and output the BCD code - or you can just get a ten position rotary switch and do it yourself with steering diodes.
The outputs have to be sent to a decoder, driver (can be in a single package usually including a "latch" to hold the count input temporarily)
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Gives the basics
Your display driver would depend on whether you want Common Cathode or CA display LEDs or an LCD display.
This stuff is really easy to do - just a few data sheets and some think time - and it has been presented in thousands of hobby articles. Search.
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