> I am interested in building a IV-11 clock from scratch, and have Maxim > 1771s, inductors around 1000 uH, and IRFD220s on hand ... > > > Best, > Dylan
Since you already have the MAX1771, I wouldn't go to another chip (like a MC34063 or 555). That's like trading in your Porsche for a Ford Escort. The 1000uH coil is too much inductance. Try a 100uH. The 1771 will find the best frequency with either, but the 1000uH will probably be audible. Plus what's the current rating on that coil ? You want something around an amp, at least. The only real downside of the 1771 is that you have to carefully arrange (physically layout) the parts. It usually doesn't lend it self to well on perfboard. A PCB is almost a requirement. I've done it on perfboard, but it was a copperclad perfboard. That require you to take out an Xacto knife and cut away copper where you don't want it. I'm crazy, and most of the nerve endings in my fingers have been cut, due jamming to many sharp objects into them. I hate it when blood shorts out traces ! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
