The modules use both the RCWL-9616 and the BISS-0001 but it seems the schematics are all labeled BISS-0001. The parts values are different. He gives some good information about them. They operate at 3.5 and 3.98 GHz – the ones I have were advertised at 5 GHz. Also he shows his own version that uses a
(Read More…)
The 555 timer chip has been extremely popular for over 50 years. The 555 number was assigned by Hans Kamenzind; it was not named after the Three 5k Resistors. This 1 min YouTube short explains.
The NE555 and some interesting information about it. A YouTube short by @Evilmonkeyzdesignz.
I posted this comment to FB Arduino group 2017-09-22. “Can I use a 7805 (regulator IC) to charge my cell phone?” The output is 5 volts, which is what the phone needs to charge. But the average smart phone will take more than 1 amp, up to 2 amps to charge quickly. The 7805 can’t
(Read More…)
