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the LED can be used to reuse a control port
The ATtiny85 based mini development board is similar to the Arduino but cheaper and smaller and a bit less powerful
Internal Potentiometer value: 10k
Communication level: 0
as well as proximity and gesture sensing with an IR LED
Passive/Active Buzzer Module 5V phone the LED can be usedBuzzer module make the simplest sound. Just change the frequency, you can hear different sounds (like alarm). Experiment with digital sound using this buzzer module. It is used on daily appliances, like PC, phones and so on. buzzer Passive Buzzer Module There is no shock and source inside the passive, so if the dc signal cannot make its chirp, it must be driven by the square wave of 2K 5K, the so+und frequency is controllable , it can be made, the
US$ 62.00
US$ 28.00
US$ 48.00
