An Electronics Video Blog
In this video, Steve builds a 6 digit LED clock from some Kingbright SA23-12SRWA 7 segment displays and a Microchip PIC18F26K20 microcontroller. You can build one for yourself with the schematics posted under my LED clock page
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Could you please tell me where I can get pad boards the size you use for the led clock
And are there any clock IC,s on the market you don’t have to program
Many thanks
Pete
Hi Pete, the board is made by CIF (cif.fr)- part number AJP58. You can buy it from Farnell. There used to be a couple of clock ICs many years ago, but they were quite specific in their use, primarily designed for use in radio alarm clocks. You can build from discrete logic if you have the inclination. If you don’t have a programmer, I’d be happy to send you a programmed PIC if you were to use the same schematic as I have posted.
Thanks for reading.
Steve
Hi Steve , the clock is now well under way and have all components
except the pic and the DS32Khz chip which I cant find in its 8pin dip
package, but I have been told they do make. As for the pic I will gratefully take up your offer on the pre programmed one
and you can send me your details for reimbursement
many thanks
Pete
More projects like this would not go amiss
Hi Pete,
That’s great, you’ll have to post some pictures or send some to me and I can put them on the blog. I also had trouble finding the 8 pin version – I expect it’s special order only. One thing to note – I actually did not place the D.P. resistor so you may want to leave that off your PCB otherwise the D.P.s will all flash with the current firmware.
If you send me an e-mail I’ll happily send out a PIC.
Steve
hope you’ll make with avr, atmega8 maybe, because avr is easier to get in here.
Hi Sarman, I’ll see how easy it would be to port to the AVR. I’ve not used them much, but I’d have thought most of the code other than initialisation and peripheral access could simply be copied across.
maybe you can suggest me the hardware for driving the 7 segment, because avr (atmega8) use 5v, and your schematic use pic that use 3,3v… thanks 🙂