CRYSTAL TUNING PART II
Moderators: adafruit_support_bill, adafruit
Please be positive and constructive with your questions and comments.
- Barry914
- Posts: 448
- Joined: Sun Dec 08, 2013 1:26 pm
Re: CRYSTAL TUNING PART II
Sent you an email
- jarchie
- Posts: 615
- Joined: Sun Jun 24, 2012 2:16 pm
Re: CRYSTAL TUNING PART II
Sorry! I never received the message. Would you mind forwarding your email directly to my personal address?
- russell 27
- Posts: 242
- Joined: Thu Sep 12, 2013 3:59 pm
Re: CRYSTAL TUNING PART II
To anyone interested; This SMD external Oscillator combines the best of both worlds, minimal VOLTAGE variation, while buffered. It's more reliable than the internal ATMEGA crystal inverter gate. Not much bigger than the Maxim time chip. Built it on a Schmart SOIC Board, Gate was a Rohm BU4SU69G2 single inverter. Soldered in over the original crystal mounting. Buffered Pin on the upper right will accept test lead. Based on the original Tuned Pierce Oscillator post, The capacitors are 3- 25 Pico Farad, set around 25 Pf. This board and circuit had virtually no inherent capacitance.
- russell 27
- Posts: 242
- Joined: Thu Sep 12, 2013 3:59 pm
Re: CRYSTAL TUNING PART II
Please be positive and constructive with your questions and comments.