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DiGrove is Didels Grove on steroides. The DiGrove modules aspire to extend the fantastic Grove ecosystem by new, innovative and fascinating modules. Primarily designed for education and development, the modules are also handy for all sorts of DIY projects.
The DgIrIrm DiGrove module consists of an infrared diode with transistor amplifier as sender and the infrared receiver module CHQ0038. This means that the DgIrIrm can be used for sending and receiving IR signals.
The IR diode is powered through the amplifying transistor with ~15-20mA which results in a pretty good coverage with your IR sender. The maximum distance can be further increased by adding a further resistor in parallel to the 220 Ohm limiting resistor. If you i.e. add a 33 Ohm resistor in parallel, this will result in over 100mA for your sending diode - resulting in increased range (10m).