ماژول تایمر NE555  مولد پالس   Description Size 20mm  40mm  function square wave or rectangular waves of different frequencies   parameter index 1 Power supply Input voltage 5V12VDC 5V supply output current is about 10MA when 12V power supply output current is about 30MA 2 Frequency 5 bands Found     J1 file 06Hz  25Hz      J2 profile 7Hz  300Hz      J3 file 50Hz  25kHz      J4 block 350kHz  66kHz      J5 block 67kHz  180kHz Adjustable duty cycle range 04099 3 LED output indication the low level LED lights LED off high led flashing speed indicates the output frequency variation except jump cap choice of different frequency bands outside RV1 can adjust the frequency adjustment regulation led flashes can be seen as adjust the frequency change corresponding to the change 4 Input Current 100MA 5 Output voltage 42V  114V peak with supply voltage variation 6 The output frequency is calculated Period T  07 Ra  2Rb C Ra Rb is 010K adjustable 7 Input VCC GND Output VCC OUT GND here input voltage and output consistent with the purpose of userfriendly you can followup power supply OUT is the output signal frequency