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Recent Forum Posts

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

Board layout is very critical around the Xtal. Datasheet recommendations should be taken very seriously into account.

Also load capacitance. The circuit inside the chip is designed with low power...
Ioannis Yesterday, 19:32

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

And here is another addition from me as an attention:

I had DS1302 and an IR transmitter on the same board.

PWM module was pushing 38Khz signal to IR LED.

It turned out that the clock was...
sayzer Yesterday, 18:26

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

Directly from DS1302 data sheet page 4:

Connections for Standard 32.768kHz Quartz Crystal. The internal oscillator is
designed for operation with a crystal having a specified load capacitance of...
Dave Yesterday, 16:46

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

This comes in four different C load versions from 6 to 12,5 pF.

Maybe you have wrong load capacitance.

Also I suppose it is parallel loading, it is not noted in the pdf.

Ioannis
Ioannis Yesterday, 16:18

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

https://www.digikey.com/product-detail/en/citizen-finedevice-co-ltd/CFS-20632768EZBB/300-8761-ND/2217072
CuriousOne Yesterday, 15:54

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

Not all crystals are the same. Others are for serial resonant and others for parallel.

Do you have the data sheet of the digikey ones?

Ioannis
Ioannis Yesterday, 10:24

Re: 18F45K40 Can't set PORTD.1

Hope too! I was there 15 years ago and was very impressed. Kebab it is then!

When you get the board back, the test Henrik suggested would be very informative and interesting.

Ioannis
Ioannis Yesterday, 10:23

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

Fixed, it was crystal issue. I've bought expensive, 6pf matched crystals from digikey, but they did not worked with DS1302. Installed some cheap one from China - works fine :D
CuriousOne Yesterday, 08:44

Re: 18F45K40 Can't set PORTD.1

Thank you Ioannis. I hope to see you in Istanbul one day. Unlimited true Turkish sish kebap from me.

I shipped the board out. Now I do not have a board with this chip now.
And this chip is...
sayzer Yesterday, 08:40

Re: Need to drive 40 pins on variable change, is there a way to do it in elegant way?

My programming skills are quite limited, even with DS1302, it took me almost month to make things going :) I've bought DS3231, but no luck with it so far :(
CuriousOne Yesterday, 05:33

AMICUS

What is Amicus18?

Amicus is a multifunction development system inspired by the popular Arduino board, however, the Amicus board uses a Microchip PIC^® microcontroller instead of an Atmel AVR^tm type.

Comprehensive documentation and a helpful and friendly support environment, make using Amicus18 an easy and enjoyable experience for beginners and seasoned programmers.

Forum Moderator Mackrakit (Dave) very kindly ported the Proton BASIC Compiler code over to PBP3 and modified the original AMicus18 docuemts for PBP3 users.

...

Read More

The Amicus18 Board

Amicus18 is an embedded system platform based on a simple open hardware design for a single-board microcontroller, with embedded I/O support and a standard programming language. A great Partner for PBP3 and Perfect for the PBP3 Experimenter.

AMICUS18 in our on-line shop

...

Read More

Companion Sheild

The entry level shield is labelled The Companion Shield. This is a PCB laid out in the pattern of a solderless breadboard. The holes are single sided, which means that components can easily be removed using solder mop braid, or a solder vacuum tool, if a mistake is made, or components need to be re-used.

The (PBP3) Companion Shield Manual iCan be downloaded from here

See the Companion Shield in our on-line shop
...

Read More

GPS Shield

The Amicus GPS shield contains a multi channel GPS receiver, as well as a 16k byte (128 kbit) serial (I2C) eeprom, and a 3 Volt, 12mm battery socket in order to maintain the receiver's built-in RTC (Real Time Clock).

Available in our on-line store

...

Read More

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