Jump to content
General Reminder: Please make sure your email inbox is clear. We're getting a lot of bounced back emails. ×

Mystery circuit board

Recommended Posts

Hi, Just at a glance it looks like it might be a sort of credit board. It only has one input and one output, is it in line with the coin signal?

4017 is a counter and could be used as a divider to count multiple (coin) input pulses before generating an output pulse via the open collector transistor.

4093 is a quad nand gate with schmitt trigger inputs, commonly used for switch debouncing. One stage seems to be between the input signal and the clock signal for the counter.

- with a bit of tracing the whole circuit could be drawn up but it's hard to do from a photo as the wire links etc. on the top of the board aren't entirely visible.

Anyway, hope that helps. Regards, John.

  • Like 3
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...