Last Friday and Saturday I transfered the components to the perf board. I used regular perf board this time instead of the breadboard type perf board that I used for the alarm circuit. I had to make a sketch of the circuit on the perf board before I started to solder. The sketch was simply hand drawn and depicted all the components positioned on the perf board and all the solder joints. I realised this circuit needed a lot of soldering. The wire cutting and soldering indeed took a serious amount of time even more than anticipated. The end result looked like a spaghetti of wires (see image). I attached the 9V battery and... only one LED started glowing. Disconnecting and reconnecting the battery prompted other LED's to glow but nothing like the LED chaser. I replaced the 555 timer and the 4017B counter. Same result. This leads to the assumption that the 555 timer isn't properly triggering the counter. Alas no finished LED chaser for this Valentine but that doesn't mean I'm not going to solve the problem. To be continued.
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LED chaser. Just one LED glows. Probably due to the 555 timer that doesn't properly trigger the counter.
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| Almost finished LED chaser connected to a 9V battery. |
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| Spaghetti of wires at the back of the perf board. I could have given the lay-out a little more thought. |
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