Hi all
I built the focuser and was delighted EXCEPT I suffered many random resets of the Arduino, usually during jogging moves. This often somehow held open the Com port on the PC and prevented re-open and then had to close windows program and restart in order ot reconnect. Not ideal
On a hunch I pulled up the RST pin with a 10k resistor and - no more resets!
Hopefully this can help others with baffling resets
Rgds
Les
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Hi Les
Congratulations on getting your focuser built and working.
Jogging really is a gimmick and I have never been happy with it. The problem lies in some of the Windows coding that I just cannot overcome. Events are not always fired off in a predictable order, meaning that on occassion some commands to the focuser associated with jogging arrive in the wrong order or at the wrong time.
The RST pin (power-on reset circuit) is highly recommended and may applications work unreliably without it.
Cheers
Robert
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Hi Robert
Thanks for the reply. I just re-looked at the schematic and see that the reset slide switch should be ON for normal operation. which means the electrolytic cap should be in circuit. I must admit I left that out, thinking the switch closed would reset the arduino. I guess I was wrong! Will swap out the resistor for the cap and a switch.
Many thanks
Les
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hi all
I built the focuser and was delighted EXCEPT I suffered many random resets of the Arduino, usually during jogging moves. This often somehow held open the Com port on the PC and prevented re-open and then had to close windows program and restart in order ot reconnect. Not ideal
On a hunch I pulled up the RST pin with a 10k resistor and - no more resets!
Hopefully this can help others with baffling resets
Rgds
Les
Hi Les
Congratulations on getting your focuser built and working.
Jogging really is a gimmick and I have never been happy with it. The problem lies in some of the Windows coding that I just cannot overcome. Events are not always fired off in a predictable order, meaning that on occassion some commands to the focuser associated with jogging arrive in the wrong order or at the wrong time.
The RST pin (power-on reset circuit) is highly recommended and may applications work unreliably without it.
Cheers
Robert
Hi Robert
Thanks for the reply. I just re-looked at the schematic and see that the reset slide switch should be ON for normal operation. which means the electrolytic cap should be in circuit. I must admit I left that out, thinking the switch closed would reset the arduino. I guess I was wrong! Will swap out the resistor for the cap and a switch.
Many thanks
Les
Hi Les
Its not actually a reset per se, more of a Prevent Power On Reset circuit. :-)