Quote: Originally Posted by Ale
I have added some suggestion onto your breadboard
Thanks for your help. As I said, I once knew electronics theory but never put it in practice.
So OK for the clips at the power source.
Just to be sure of the other changes you propose, let me first explain my photograph (hopefully also useful for others) :
- the power are the two black/red lines on the top left. Black is currently not plugged, so the circuit is not powered. When connected, black goes to the top row of the breadboard, which is the ground. Red immediately goes to the Vcc of the MAX3232 while the ground pin of the MAX3232 is linked to the top row via the thin red (
) wire
- the grey shielded cable above comes from the hu/cdc connection. As you can see, shield (ground) is immediately connected to the top row too, while red (Rx) and black (Tx) go through the 18k resistors, then to the MAX3232 through resp. white and grey wires
- the grey shielded wire below goes to the PC serial ports. The shield (ground) is connected to the top row via a white wire and red and black (Rx of resp. COM1 and COM2) are linked to outputs of the MAX3232 via resp. green and yellow wires
- the 2 red bridges at the bottow right connect the output of the TTL/RS buffers to the input of the TTL/RS buffers.
From your edited drawing I guess what you mean is :
- secure power lines connections with a clip
- put the resistors just before the MAX3232 pins
- add a 10 uF capacitor in parallel with the 0.1uF one.
Is that correct ?
Thanks again for your help. It's much appreciated.