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Microcontroler circuits and Protoboard. Is it a bad idea ?

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mcoster

mcoster

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Hi everybody,

I am making a school project using 8051, ADC, LCD and serial com.

I am making my prototypes using a protoboard. The problem is that i got random errors happening.

I would like to hear from the most experienced ones if these errors can be caused by the protoboard (bad) isolation to high frequencies, since my source code seems to be ok ?

I am using a 12 MHz clock as 8051 clock, my boud rate for the serial port is 2400 bps.

thank you very much.
mcoster
 

No protoboard (prototyped breadboard) is not a bad idea. Imagine if you solder things and desolder again for small errors.

How many errors a guy can make?

Later build schematic, draw layout and make it in printed circuit board.
 

Re: Microcontroler circuits and Protoboard. Is it a bad idea

Hi,

You may check the power supply, whether you have or not decoupling capacitors 10-100nf + 10uF on power rails!!!

Bye
 

Re: Microcontroler circuits and Protoboard. Is it a bad idea

When using breadboard (solderless) check for bad contact in the holes (if the breadboard is old and very used) and use short wires. Some friends had problem with the capacitance between contacts what can make the crystal oscillator not work as planned.
 

In my opinion, when designing an application works with high frequency, it will be better if you use a soldering breadboard.

With prototyped breadboard, sometimes there are some problems with electrical contacts and wiring.

Check you wires and to be sure that all contacts are good !
 

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