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GeneralRe: LOL PinmemberGeekforChrist11-Jan-13 14:57 
GeneralRe: LOL PinmemberBrisingr Aerowing11-Jan-13 14:59 
GeneralRe: LOL PinprotectorAspDotNetDev12-Jan-13 15:41 
GeneralNuget [modified] PinmemberBrisingr Aerowing11-Jan-13 14:46 
GeneralRe: Nuget PinmemberRanjan.D11-Jan-13 15:04 
GeneralToday I embarked... PinmemberCDP180211-Jan-13 14:27 
GeneralRe: Today I embarked... PinmemberBrisingr Aerowing11-Jan-13 15:26 
GeneralRe: Today I embarked... PinmemberRoger Wright11-Jan-13 18:50 
CDP1802 wrote:
there used to be ICs to scan and encode a 4 x 4 keyboard matrix,

Don't they make diodes and SN74LS154 4-to-16 de-multiplexors anymore? I seem to recall that we used diode (1N914 or 1N4148) OR arrangements on the keyswitches to encode a 4x4 array into 4 bits, then the '154 to expand to one of 16 outputs. We didn't need no stinkin' scanners, though a switch debounce circuit certainly came in handy.
 
Now that you have it working, have you thought of any practical use for it?
Will Rogers never met me.

GeneralRe: Today I embarked... PinmemberCDP180212-Jan-13 2:20 
GeneralWhat Linux is good for ? PinmemberBillWoodruff11-Jan-13 14:22 
GeneralRe: What Linux is good for ? PinmemberBrisingr Aerowing11-Jan-13 14:37 
GeneralRe: What Linux is good for ? PinmemberPIEBALDconsult11-Jan-13 15:15 
GeneralA praise to the crowd! PinmemberManfred R. Bihy11-Jan-13 13:17 
GeneralRe: A praise to the crowd! PinmemberGarth J Lancaster11-Jan-13 13:50 
GeneralRe: A praise to the crowd! PinmemberManfred R. Bihy11-Jan-13 13:52 
GeneralRe: A praise to the crowd! PinmemberGarth J Lancaster11-Jan-13 14:10 
GeneralRe: A praise to the crowd! Pinmemberlewax0011-Jan-13 14:00 
GeneralRe: A praise to the crowd! PinmemberGarth J Lancaster11-Jan-13 14:12 
GeneralRe: A praise to the crowd! PinmemberManfred R. Bihy11-Jan-13 14:01 
GeneralWTE??? Pinmembergavindon11-Jan-13 12:30 
GeneralRe: WTE??? PinmvpDave Kreskowiak11-Jan-13 12:36 
GeneralRe: WTE??? PinmemberCDP180211-Jan-13 12:46 
GeneralRe: WTE??? PinmemberGarth J Lancaster11-Jan-13 12:47 
GeneralRe: WTE??? PinmemberMycroft Holmes11-Jan-13 12:57 
GeneralRe: WTE??? PinmemberGarth J Lancaster11-Jan-13 13:14 

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