Just yesterday I finished 2 more apps for a customer of mine with a 508.
Application No. 3 - Digital pot - D/A ( Mechatronics ? )
Pin 7 of 508 generating PWM with LP filter. Pin 2 and 3 connected to 24LC00. Pin 4 and 5 connected to two switches (up/down).
Pressing the up and down key increases and decreases the DC voltage
at the output of the LP filter.(10mV ripple)
From the last key pressed, a 5 second timeout will write the PWM duty
cycle ( on time only - 1 byte, since the off time is complement of the
on time ) to the 24lc00.
On power up the 24lc00 is read and the duty cycle is restored.
Application No. 4 - Counter / Running hour meter
Used a HOLTEK 10 digit LED display module via 2 wire interface to 508 (pin 7 and 6). 24LC00 connected to pin 2 and 3. Pin 4 connected to power fail detect and pin 5 clock input.
On power up, if pin 7 is low, the device works as running hour meter and counter if high. On detection of a power fail, the current values are written to the 24lc00.
On power up the 24lc00 is read and the values are restored.
Pailoor --------------A11E72835DF6C4951450834B-- --------------556E6D969F277F3B66BA0F99 Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Content-Transfer-Encoding: 7bit begin: vcard fn: Ravi Pailoor n: Pailoor;Ravi org: Chip Technologies adr: No. 70, 9th Main Road,;;Mathikere,;Bangalore;Karnataka;560 054;I NDIA email;internet: chiptech@vsnl.com title: Chief Executive tel;work: +91-80-2202172 tel;fax: +91-80-2258103 tel;home: +91-80-3362807 note;quoted-printable:Member - Microchip Consultant Program=0D=0A= Contact for = =0D=0A= 1. Embedded Control Solutions using PICmicros=0D=0A= 2. Application Specific Standard IC's x-mozilla-cpt: ;0 x-mozilla-html: TRUE version: 2.1 end: vcard --------------556E6D969F277F3B66BA0F99 Content-Type: text/x-vcard; charset=us-ascii; name="vcard.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Ravi Pailoor Content-Disposition: attachment; filename="vcard.vcf" Content-Transfer-Encoding: 7bit begin: vcard fn: Ravi Pailoor n: Pailoor;Ravi org: Chip Technologies adr: No. 70, 9th Main Road,;;Mathikere,;Bangalore;Karnataka;560 054;I NDIA email;internet: chiptech@vsnl.com title: Chief Executive tel;work: +91-80-2202172 tel;fax: +91-80-2258103 tel;home: +91-80-3362807 note;quoted-printable:Member - Microchip Consultant Program=0D=0A= Contact for = =0D=0A= 1. Embedded Control Solutions using PICmicros=0D=0A= 2. Application Specific Standard IC's x-mozilla-cpt: ;0 x-mozilla-html: TRUE version: 2.1 end: vcard --------------556E6D969F277F3B66BA0F99--