Hello I am looking for help.
I have made a up down counter and I don't know what battery to use.
On the screen it says power dc 5v- 28v. I really need to know what small battery I can use. Currently I have been using a mn21/23 12v battery.
Hope someone can help.
OK, well when you explain what it is that you have made, using what parts with Web links to each assembly other than simple named ICs, and show us the circuit schematic and perhaps a photo of your setup, and tell us on what "screen" it says power dc 5V- 28V, we can most certainly help you.
Fair enough?