The following warnings occurred:
Warning [2] count(): Parameter must be an array or an object that implements Countable - Line: 795 - File: showthread.php PHP 7.4.33 (FreeBSD)
File Line Function
/showthread.php 795 errorHandler->error




HP Forums / HP Calculators (and very old HP Computers) / General Forum v / Hp 25 LED brightness

Post Reply 
Hp 25 LED brightness
04-10-2022, 09:34 AM
Post: #1
Graan Offline
Member
 		Posts: 105
Joined: Dec 2013
Hp 25 LED brightness
Hello
I bougt a 25C and a 25 online couple of years ago. 25C was working but not the 25. This weekend i opened it and found some corrosion on the main pcb. Cleaned pcb and contacts and it works. If I compare the LED brightness of the calcs the 25C is a bit brighter.
Is it possible to increase the brightness on the 25?
Read there is a resistor controlling the brightness.
Also a pot at the cathode driver, but could not find what its doing.
/Andreas
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
Hp 25 LED brightness - Graan - 04-10-2022 09:34 AM
RE: Hp 25 LED brightness - BobVA - 04-10-2022, 10:06 AM
RE: Hp 25 LED brightness - teenix - 04-10-2022, 10:08 AM
RE: Hp 25 LED brightness - Graan - 04-10-2022, 11:53 AM
RE: Hp 25 LED brightness - GreyUser - 04-12-2022, 12:01 AM



User(s) browsing this thread: 1 Guest(s)

Contact Us | The Museum of HP Calculators | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication