Category. Description, Digital Alarm Clock. Company, Sanyo Semiconductor Corporation. Datasheet, Download LM datasheet. Quote. Find where to buy. LM datasheet, LM circuit, LM data sheet: SANYO – Digital Alarm Clock,alldatasheet, datasheet, Datasheet search site for Electronic Components . datasheet search, datasheets, Datasheet search site for Electronic Components and LM Datasheet(PDF) 5 Page – Sanyo Semicon Device.

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I have a small lamp pm8560 into the same circuit. It’s best to keep the power consumption to a minimum, especially if discrete LEDs are used for the display for details consult the datasheet available here: Fortunately there’s a simple fix available.

This catasheet is repeated fast enough datadheet our eyes see the complete image. Putting it all together First the PCB was built using the photo-transfer method then etched. This is not much of a problem today, but back in the day especially in eastern Europethe mains had probably around Hz so electronics engineers either avoided using this IC or made separate oscillator blocks with quartz crystals search for 50 Hz timebase circuit.

After replacing the bulb and socket, the clock would not advance the time. The chip needs a center tapped transformer for multiplexing the display and also for keeping the time. Increasing them will minimize overall power consumption and make the transformer run cooler. That being said, here are the schematics and a PCB for the clock: The power supplied for each of the display segments is 18 mA.

I use one on my bedside table. From the time stamp, it looks to be made in the third week of Info on the code is no longer available.


According to the datasheet, it it a 4-digit clock IC that uses a duplex LED display to show the time. A few days later, it started to lose time, but kept running. Some other details The chip can work with both 50 Hz this is what I used or 60 Hz mains frequency. The 50 Hz or 60 Hz pulses from the mains are used instead of an external oscillator, probably to dataheet things simple and thus cheap.

Arrange it over the photo-sensitive PCB in such way that you can read the text normally through the transparency.

Without the backup battery, the time will simply reset.

LM Datasheet Sanyo pdf data sheet FREE from

They are no longer sold and GE has no support for them anymore. It also damaged my clock. So when half of the display is on, the other half is off. When my light bulb burned out with a bright flash due to a bad socket, it tripped the breaker l8560 the whole circuit.

The one in the picture was cut from a broken floppy disk ribbon cable.

The schematic Since I was in need of a easy to read clock, I decided to make one with this chip. In case you want to build the project and you can’t datasjeet a suitable common cathode duplex display, here’s the electrical schematic of one that’s tested to work: The only difficult part was finding a suitable display duplex LED, model S.

It shouldn’t be too hard to datasheett normal leds instead of a display. The radio still worked, so I moved it to another room and plugged it in. This will prevent oxidation of the copper.

(PDF) LM8560 Datasheet download

Ready board The next step was to solder all catasheet parts and find a cable to connect the screen. That lasted a few days until the error code came back.


Newer Post Older Post Home. And it’s old, really old. Posted by Alex at When the power is out, the chip will activate an internal Hz oscillator that uses C3 and R4. The chip’s absolute maximum power dissipation is mW. You can leave pin 26 disconnected for 60 Hz, or leave it grounded to use it at 50 Hz with care, as ground is VSS here.

The advantage of this design is that it allows to use less wires to connect the display to the board. The chip can drive the LED display directly. These are great clocks and if my lamp had not damaged it, it may have kept running forever.

The maximum input voltage for the chip is V so make sure to km8560 a suitable transformer. The model number of the clock is Etching the board After thorough cleaning, I used a small piece of expended desoldering braid to cover the traces with solder. Regarding the display mode, the current build shows the time datadheet military format 24H.

The clock will need mains voltage for operation, battery operation is not supported see pt.

Each of those resistors is responsible for limiting the current on the 2 cathodes. While the datashet is out, screen output will also be off. You can also go with a 2 x 7.