Arduino Monitor/Tester

I finally finished my Arduino Monitor/Tester!

This is how it turned out to be:

• One LED for every single input or output
• Can be used with Uno, Leonardo, Mega, Due, Mini, etc.
• Also fits with my universal I/O board
• Power taken from Arduino 5V and 3.3V outputs, and the Vin
• Load on any pin is 10 kohm or more
• LED intensity proportionally reflects the pin voltage or duty cycle

• Builtin inputs and outputs for testing new ideas:
  • One pushbutton (P) to digital input
  • One toggle switch (T) to digital input
  • Two potentiometers (1, 2) to two analog inputs
  • 4 digital outputs to HEX-display (e.g. for program STATE output)
  • Very small moving coil voltmeter on PWM output
  • Piezo loudspeaker on PWM output
  • 4 digital outputs to open-drain MOSFET (builtin flyback diodes)
  • One opto-isolated digital input
  • One opto-isolated digital output (not for 230 VAC)
  • One direct analog input via miniature LEMO coax connector
  • One direct digital I/O/PWM via miniature LEMO coax connector
  • One reed-relay (no coil) to digital input
  • One mercury shake alarm to digital input
  • One TMP36 temperature sensor to analog input
  • One electret microphone to analog input (x 100 gain)
  • One NTC resistor to analog input (linearized)
  • One light-dependant resistor to analog input
• All inputs and outputs can be made passive to enable inputs from other sources
• LED’s grouped in 16 for analog I/O, 14 for digital I/O/PWM, 8 for digital I/O/Tx/Rx and 32 digital I/O. In total 70 LEDs.
• All LEDs are very high efficiency white SMD types with coloured film on top, according to the group.
• The LEDs cathode reference can be adjusted down to -2V: LEDs will start to light up when pin voltage goes positive.
• The cathode reference is divided into one for analog and one for digital, adjusted individually
• Maximum input voltages can be selected between 5V or 3.3V to fit with DUE board
• Voltage for internal circuits and steppermotor outputs can be selected between 5V and Vin
• IC-sockets and Arduino pins are all gold plated
• LEMO I/O, Shake-sensor, NTC, TMP36, microphone and piezo-speaker are in a detachable separate module

Here you can see the separate compartment with the two LEMO connectors, TMP36 and NTC temperature sensors, and a blue LED indicator for 5V. The piezo-speaker and microphone is on the side facing down (see the next picture). The shake-sensor you can see on the picture above: It is placed on the connector for the separate compartment.

For more detail: Arduino Monitor/Tester