Avrdude: Device signature = 0x000000 on custom board

Other Hardware 3rd Party Boards
21

Thanks for the extra part!

22

I used to work on a controller for a vending machine, that had green and red LEDs to indicate whether selections were available or not.

The green LED was turned off when a transistor switched on a red LED in parallel with it.

Red Green LED Switching
Red Green LED Switching1185Ɨ890 6.99 KB

23

You are welcome

24

Thats sick!

One last thing is that the TX and RX lights are always on, did i do something wrong?

25

Yes
The idle state for RX and TX is HIGH

26

So with a inverter i can make em blink when they are used. This project turns out to be more educational that actually doing! That was all, it works, it looks like a biohazard but thank to everyone that has helped me over the past 2 days!

27

No need for an inverter.
Connect the LED cathode to the RX(TX) pin and connect the resistor between the LED anode and 5V.

Read the CH430 datasheet to see how much current the pins can source/sink

28

image
image553Ɨ826 16.6 KB

So like that? I have never used something like this, i usually make a NOT-gate

29

Yes it works! Thanks

30

Most logic devices can sink more current that they can source so I almost always use that circuit.