Beskrivelse:
MI450 er et elektronisk ur bygget op med standard TTL kredse. Tiden udlæses på 6 Nixie rør. Urets tællekredsløb styres af lysnettets 50 Hz frekvens hvilket sikrer en meget lille tidsafvigelse.
Tekniske data:
- Driftspænding: 220 V AC
- Strømforbrug: 50-70 mA (11-15 watt)
- Spænding/nixirør: 150 V DC
- Tidskonstant frekvens: 50 Hz fra lysnet
- Antal cifre: 6 (Timer, Minutter og Sekunder
Hi Michael!
I’m building this device too! I found a possible error in the PCB. there is no hole for the capacitor in position C3. I don’t know if this was planned or omitted. I would like to make one comment: for the TTL integrated circuits, cooling capacitors should be inserted, 1 for each.
Hello Istvan Angel
Hi Istvan
The holes for C3 is not on the original layout. C3 is to be “surface” mounted 🙂
Best regards
Michael
Hi Michael!
Thanks for the answer – even if it’s late, I’ll answer it – I just interpreted the implementation correctly. But thanks for your answer and the confirmation. I’m slowly getting to grips with it.
Best regards Istvan Steve