Post Created date
Can 74HC4066 switch component video?
Maxim make switches for these kinds of signals lots of options in
Monday, 7 January 2008 - 06:06
Telephone PICK UP (Answering) Detection
Call progress tones vary from country to country. Even if you wait for the end of the ringback tone (which can also vary within a country - by final loop carrier), you could be...
Thursday, 13 December 2007 - 05:00
Composite HID USB Device
DeviceDescriptor Config1 Interface1 HID_Descriptor Endpoint1 Interface2 HID_Descriptor2 Endpoint2 ReportDescriptor1 ReportDescriptor2 Interface numbers are zero-based Order of...
Thursday, 29 November 2007 - 03:37
General purpose transistors
OCP71s were too dear - but you could scrape the paint off an OC71. (funny things happened if the paint was scratched and you didn't know) [edit] I still have a Mullard Databook...
Friday, 23 November 2007 - 06:33
Multiple Seven Segment Problem
Look at for a start. From there you can find other links
Monday, 19 November 2007 - 02:23
Dragon Dead on Arrival and missing a tail!
"Touch wood" goes back to the middle ages when holy relics were big business. It is estimated that there were enough pieces of the "True Cross" about to build the Ark. They made...
Tuesday, 13 November 2007 - 04:22
What's this connector?
Quote:clamp the cable (small phenolic strip or similar) down with some conductive silver paste (or nothing) between Or a zebra rubber strip salvaged from a dead LCD module
Monday, 12 November 2007 - 02:31
Solar power & battery charging
Quote:Many home solar applications are now using Iron-Nickel batteries. Very tolerant of over charge. Electrolyte is sodium hydroxide. Problem is there is only one source, and...
Friday, 9 November 2007 - 02:40
RS232 Subtractive 16 bit Check Sum
One of the program memory checking routines that I've seen used on systems with external ROMs adds 1 to each value before a standard unsigned add to the checksum ignoring overflow...
Thursday, 8 November 2007 - 01:37
Getting a DIP into its socket...
To extract 40 pin DIP chips (and to remove the plastic plugs from chip tubes without breaking your fingernails) use the "universal engineering tool" - the PC backplane metal bit...
Wednesday, 7 November 2007 - 04:58
Easy way to run AVR off of 120VAC?
There are single chip devices that will give you 5V from mains (120/240VAC) that are used to provide the bootstrap for switch-mode power supplies - may not be enough current....
Tuesday, 30 October 2007 - 01:22
Drawing to give away 2 STK500's, etc.
Quote:> (to the Freaks old timers who might read this: Is the above fair? > Is it too easy, to hard? Recommendations please) I think it's fine. Me too! I hope someone runs...
Friday, 26 October 2007 - 08:13