1. Pulse counter

About

Mode used for counting number of pulses in a signal. Display shows total number of pulses and increments with each new one. Count value can be reset any time with a button press.

Details

• Count signal pulses at DIG1 pin.
• Maximum frequency up to 23 MHz*.
• Input pin is pulled HIGH (default state).
• Display is updated each pulse. Value will overflow after 999999999.
• Signal HIGH level should be in the amplitude from 2 V to 5 V.
• Left corner LED DIG1 will light up according to signal state (HIGH or LOW).
  It is not directly tied to input pin. Only for visual representation.

* Frequencies over 10MHz can be affected by electrical conditions (contacts, wire length, voltage, no shielding, etc.). Make sure wires are short and signal is stable enough.

Controls

Reset counter to 0:

• Click Left SELECT

Switch between detection edge (does not change pull-up):

• Click Right SELECT to change mode:
  • On HI - count on rising edge ⎽/⎺ (default)
  • On LO - count on falling edge ⎺\⎽

Enter mode:

• Select Menu > 1. COUNt.
• (deprecated) In Main screen hold SET+ for 3 seconds.

Exit mode:

• Open menu and select other mode.
• (deprecated) Press SET+ to exit to Main screen.

Example

1. Connect D9 digital pin to DIG1 pulse counter input.
2. Enter pulse counter mode by selecting Menu > 1. COUNt.
3. Load code sketch to TotemDuino:

   void setup() {
     pinMode(9, OUTPUT); // Set pin D9 to output
   }
   void loop() {
     for (int i=0; i<10; i++) { // Repeat 10 times
       digitalWrite(9, HIGH); // Set pin D9 HIGH
       digitalWrite(9, LOW); // Set pin D9 LOW
     }
     delay(500); // Wait 500ms
   }
   

4. Observe that the counter increments by 10 every 0.5 second.
5. Click Left SELECT to reset counter value.