The LED Block was created as a monitoring and diagnostic tool. It is designed to be directly connected between the output of a Poly Block, and some other Blocks, to permit the easy monitoring of outputs. Signals arriving at the I0 - I3 inputs are transfered directly to the O0 - O3 outputs and a monitoring circuit attached to activate an LED when the input is activated. Normally LEDs consume a small amount of current, bu the LED Block has it's own amplification so there is no effect on the signals passing through.

How Do I Use This?
The LED Block needs to be connected to 0V and 5V, on either one of its two pairs of 0V/5V connectors. Connect a piece of wire from an output connector from another board (PolyBlock, Intro Module, etc.) to one of the input connectors on the LED Block. Then connect a wire from the corresponding output connector on the LED Block to the device in your project which will actually do something with the signal.

Applications
- Test/Debug Monitor. In trying to debug a project with several components, it can often be difficult to know which device is the one misbehaving. Adding an LED Block to the output of a device gives clear visual feedback of the device just before it, allowing you to isolate the unexpected behavior and find the bug. You could also do this with a multimeter, but we've found the LED Block to be much more convenient - as opposed to fumbling to make connections with the multimeter leads each time you want to test a signal, just leave the LED Block attached for duration of the project.