been out of electronics too long and ant work this one out now.
i want to build a circuit, an alarm circuit, that will toggle armed and unarmed with 2 separate high inputs, e.g. one input goes high for half a second to turn it on and another input goes high for half a second that turns it off. no matter how many times a high pulse is sent to the on input, the alarm will remain armed and vica versa.
another n/c input to trigger the alarm out for 5 seconds, so when this input is open circuit it will trigger the alarm output for 5 seconds only when the circuit is armed. after 5 seconds waits for another alarm input.
how can i build something like this easily??
if i get just the ATMEGA328P chip and crystal and few other components, if i use the Arduino Nano as ISP programmer like i do for the attiny85 can i also program the ATMEGA328P on a breadboard with that? with the crystal and capacitor and whatever, will that work?
I uploaded the ArduinoISP sketch to an Arduino Nano to use it as a programmer for other chips. It worked successfully to program an ATtiny45, I did the usual wiring between them, and added a 10uF
I followed the description Gammons page "Now the chip has a bootloader, and you can disconnect the power (USB cable) and remove the crystal or resonator. The bootloader installation process changed the fuses on the processor, so it now runs from the 8 MHz internal oscillator. You can confirm...
Learn to program a Atmega328P or PU IC using an Arduino Nano as ISP Programmer. You can Burn a bootloader in an empty IC or burn sketches quickly from a breadboard.