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Just finished building a second bulb dial kit – after a long period having built the first a year or two back with zero problems.
The blue and green sections seem to go fine. Having finished the red and connected all up I get the following…It runs backwards when first powered upThe ‘transition’ between the seconds is slow and jerky – like instead of the nice smooth transition it should be the two LEDs alternate say 10 times visibly before the next one stays litI’ve checked the joints on the chip and the crystal plus those between the boards and they seem ok. I’ve also checked the polarity of all the red LEDs and they’re fine tooI’m a bit stumped about what to check next. I can make it run ok if I change the direction the clock runs in the settings plus turn off the (supposedly) smooth transition but I’d rather it ran properly! Incidentally it does this both with and without the Chronodot.Any help much appreciated. Thanks, DanYou are describing a number of different issues, so there may be more than one thing wrong here.
Your crystal and caps are likely just fine; it shouldn’t be running at all otherwise.I’ve never heard of a problem with the direction being initially set wrong. However, yes, there is an option to switch. I’m not sure what is causing the bad fade issue– that is one that I haven’t seen before either. One thing to check: if you leave the chronodot off and let it run for an hour, does it seem to be keeping time reasonably well?A second question: Was the clock more-or-less behaving correctly after assembling just the blue and green boards?The fact that you have intermittent issues suggests that it’s not an issue with the code. This sounds like a hardware problem. It could be an issue with a bad switch, a bad power supply, a cracked capacitor, or with a partial/intermittent short or open circuit in a few different places.
When you bump the USB-TTL connector, you are touching the reset pin (through a capacitor). This can potentially reboot the clock, and that’s not necessarily a problem. The fact that it tends to run backwards– at all –does suggest that the settings aren’t being saved or read correctly, but that could again be due to one of the factors that I mentioned above.The two things that I would check first would be to see if there is a possible soldering issue, and then to see (as I asked about earlier) whether it is keeping time correctly. You might try those. Alternately, you might consider sending it back to us to take a look– I’d be curious because of the strange effects that you are seeing. If you would like to do that, please contact us through our contact form to get an RMA.
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