Non-functioning circuit

[jw_dh]

I have built a circuit on a breadboard containing an Arduino Nano, gyroscope and SD-card writer. On the breadboard it worked perfectly.

After that I have transferred the components to a protoboard and soldered them onto it. Since then the circuit does not work anymore: The gyroscope does not give an accurate readout (stays 0 degrees in all angles) and there is no data written to the SD-card.

On all wires a voltage of 4 to 5 volts could be measured.

Where does this go wrong?

Edit: It was my first time soldering onto a protoboard, if you got any tips, please let me know.

[jremington]

You do need some practice with soldering! Use your multimeter to check all connections for continuity, and also check for unwanted short circuits between neighboring connections.

I suggest to use smaller diameter wire, and protoboards similar to that pictured below, with connector strips so that you don't have to solder wires directly to pins.

[LarryD]

Two things:

• you should have used female header connectors to plug your modules into.

• for point to point connections, you should have used 30AWG wire wrap wire.

[xfpd]

This joint is not soldered. Add flux and re-heat (reflow)

[hammy]

It is good that you have used coloured cables , but the soldering is poor and you need practice .
Meanwhile you need to check through - it is easy to solder to the wrong pins when looking at the underside , and check for shorts between your soldered points .

[paulpaulson]

Hello jw_dh

Visit the local "Makerspace" or the of local radio amateurs club to learn how to solder properly.