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It helps you to quickly build a pH meter to measure the pH value of soil or foods directly
This can be useful for example if you need to get some information from a network
Micro-USB OTG port
the higher the output
NE555 Pulse Generator Timer Module, Single Channel Electroplating It helps you to quicklyA single channel signal output, the output is approximately fifty percent duty cycle square wave. Onboard adjustable resistance, adjusting the output frequency can be controlled resistance. On board power indicator. Onboard chip NE555A single channel output, square wave pulse generator module based on the ubiquitous NE555 timer IC. The module can be powered from a wide power supply range (4. 5 to 12V) and will produce a continuous square wave output
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