The other requirements for the project were to use a microcontroller and to keep it simple. [Vadim] chose an ATtiny2313 to handle the RC-5 IR protocol and switch the light.

image: Exposure to light releases the molecule ATP. It provides the energy for an enzyme (blue) that joins DNA building blocks into a strand.

Therefore they have to be blank before programming. Now look at the Programmer window to see if the Family Module matches what is physically in the EMP-21. Now you can insert your chip into the ZIF ...

Next, remove the cover plate from the switch and use a non-contact voltage tester to confirm that the power is indeed off. Touch the tester’s probe to the wires on the switch.

The PendSV Exception From the last lesson, you should remember that the RTOS context switch “hijacks” the interrupt handling mechanism already available in the CPU. Specifically, by the end of an ISR ...