DIY DS1302 Rotation LED Electronic Clock Kit 51 Learning Board
A part of the review has been auto-translated.
Presentation: - Nice, all small parts were wrapped in plastic so they don't fall out of the bag. - a few spares of resistors and leds. Quality of the materials: - excellent PCB, all parts are marked and easy to identify on which side they should be soldered. - good parts, except for the leds which don't have the same light intensity. Would have payed 1-2 bucks extra for a better quality, since leds are visual and they affect the end product. Documentation: - outdated on the website (received V1.2 and on the website there is only V1.1). For a beginner it is hard to figure out what to do with an incomplete schematic. - setup procedure doesn't exist on the website, luckily some previous comment pointed to a PDF on the internet. Software: - it works, the clock keeps a good track of time. - some few glitches on the setup, especially with the leds. Could have been done better with minor efforts. Soldering experience: - Can be used to tutor beginners, this would make a nice experience to solder SMDs and TH parts. Overall: The clock worked flawlessly from the start. There was no need to check for errors. Nice project for beginners and/or tutoring. Possible improvements, even if price goes higher: - use of an other processor instead of a 8051 family; - make the software open source so beginners could experience both hardware and software in an easy environment (C or C+ASM); - use of a better quality leds (especially the green ones); - use of a micro-usb instead of a mini-usb connector.
Original Fonctionne parfaitement malgré un transistor pnp 8550 HS ( remplacé par un BC 557 en TO 92 ) Idéal pour se faire la main pour souder les composants CMS