Gikfun6 Bits Digital LED Electronic Clock DIY Kits PCB Soldering Practice Learning Board AT89C2051 FR-4 for Arduino EK1323

Voltage regulator (TO-92 style) beside power input is shown backwards on the silkscreen so if it doesn't work check there first (180deg twist will do it).Board comes with no operational details and clock is inaccurate.Look at it as a soldering and diagnostic tutorial and you'll be okay.Software is terrible but I bought more chips and a programmer, hoping to rescue it.

This clock project was fun. I had to research the colour codes for the various resistors. I enjoyed soldering the components into their positions on the board. It was good practice. It made a useful 24 hour GMT clock for my Ham Radio station. Pleased with the outcome.

Amusant à assembler.Le IC-7815 qui est le régulateur de voltage chauffe.Je lui ai installé un petit refroidisseur en aluminium.Les petites leds ont été connectées direct sur l'alimentation en série avecune deuxième résistance pour atténuer un peu la brillance.Le tout fonctionne très bien.

I was able to put all parts together and practice my soldering skill. In the end, I got the clock working well with all buttons running as expected. It just needs checking and re-checking each component to put it in the place before you solder it.

Full little kit. Great for anyone getting into soldering or basic engineering. Only downside is that there is ZERO power source. You have to have your own battery and connector to make functional.