Timer UP and DOWN

203

03:04:30

This is a quite Elegant solution for a Programable digital UP and DOWN timer.
This circuit runs up and down from a free of choice 2-digit number. 
That means XX->00 or XX<-00
For time set up use the up and down tap buttons.
The switch from the inverter delivers currency till 00. 
If 00 occurs the device stops if the hot switch is on.
Otherwise it keeps on going.
The 555 has been set up for convenient testing on my iPad 2.
You can change the resistor on the trigger of the 555 to match your desires...
Have fun
💫✌👽👍🍺✨🌟🌞💥

published 11 years ago

Alshabbabi

11 years ago

This is pretty cool

reinhold

11 years ago

ThanX mate, that's what I think too. Cheers

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.