If you use a 7805 as voltage stabilizer, consider these IC's need an overvoltage of at least 3V at the input. The show an voltage drop of that 3V. Usually a transformer with an output of 8 to 9 volts AC is advised (This results in a raw DS of 1.4 × 8 = 11.2 V. So you are safe for line and load dips. Adequate cooling of the 7800 is required !
eric -----Original Message----- From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On Behalf Of dr pepper Sent: vrijdag 10 februari 2012 7:00 To: neonixie-l Subject: [neonixie-l] Re: Burned K155ID1 chips? 74 ttl as mentioned really needs a 5v regulated supply, the 7805 is important. Also a ceramic decoupling capacitor accross each chip supply pins is a good idea, I've had similar issues with 74 devices, when the transistors change state within the device there is a 'rush through', sort of a temporary short across the 5v, this can deck the supply at the chip if there is resistance or incductance in the supply to it, which there allways is and cause a reset or screwup. It does sound like the chips are fried though. On 10 Feb, 04:56, micha...@aol.com wrote: > Does 0101 give a 5 as well? > > Was wondering if 0100 is stuck. > > Does it count...... > 4 5 6 7 4 5 6 7 8 9 4 > instead of > 0 1 2 3 4 5 6 7 8 9 0 > > Michail > > In a message dated 2/9/2012 7:42:23 P.M. Pacific Standard Time, > > imba.a...@gmail.com writes: > > These were the results; input 0001 gives 5 instead of 1, and 0011 > output 7 instead of 3, etc. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
