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Topic: Tiny85 breakout board...Will it hurt to leave a resonator in the circuit? (Read 938 times) previous topic - next topic

Mr. Swarf

I've got a nice little breakout board that gives me an ISP header and pins that plug into a bread board. The thing has the component location for and included a 16MHz resonator. Since most of the Tiny85s I tinker with have no need for an external resonator I have not yet soldered the resonator into the breakout board.

If I were to go ahead and solder the resonator to the board will this cause me problems if I do not set fuses for an external oscillator and upload hex files compiled to use the internal oscillator?

Thanks.
M.S.

Coding Badly

No.  I often have a setup where I switch between the internal oscillator and an external crystal.  I have only encountered one problem: if the fuses are set to use an external crystal or oscillator then the external component has to be present to change the fuses.

But, I have not tried to use the external crystal pins as I/O pins with a crystal connected.  That may cause problems.

Mr. Swarf

Excellent. That is what I suspected. The board is very tightly packed. I did not want to solder the resonator in only to find an issue. Clean removal of the resonator would not be easy.

This board makes a super easy way to program these Tinys without the hassles of a breadboard and a mess of wires.
M.S.

Coding Badly

Is the breakout board something you made or something you bought?

Mr. Swarf

I was going to make one and have Dorkbot make the PCBs for me. I then found these:

http://allgaiershops.com/index.php?cPath=22

At $2.99 each I could not make them myself. Includes everything but the MCU. I bought one each of their breadboard adapters (Tiny25, Tiny2313, Tiny84, Tiny/Mega 48/88 etc). With shipping they were less than $4 each to my door.

Assembly was simple. The boards are well made. Complete parts etc.

I'd buy from them again in a heartbeat.
M.S.


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