One timer chip can not count both 15 minutes and 20 minutes at the same time. It will be adjustable if you build it to be adjustable. A 555 timer is really stretching to do 20 minutes. Better try a CD4020 counter chip.
kindly help e with cd 4020typicadiagram lOne timer chip can not count both 15 minutes and 20 minutes at the same time. It will be adjustable if you build it to be adjustable. A 555 timer is really stretching to do 20
. Better try a CD4020 counter chip.
No just oldI was designing circuits before the Internet was invented. I had to read the datasheet and teach myself how to connect chips. I assumed everybody did that. Am I right?
Before the Internet was invented I had to find the data sheet. If the data sheet wasn't in the department library then I took a walk to the main company library. The real bitch was before the copy machine was available.Let me clarify: Before the internet was invented, did everybody have to read the datasheet and teach themselves how to connect IC's?
I remember Microfiche being new technology and we had two girls working the main library filming everything. Also remember when all our DoD Mil-Stds were in fiche as well as the AMS specifications. Antiques today.
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