Shared projects

Divide by 3 v2.0

by nsayer.

2 layer board of 0.90x0.75 inches (22.89x19.05 mm).
Shared on March 12th, 2017 18:32.

Adds a self-biased inverter on the input and PI network LPF on the output. The input can be sine or square and the output will be ~13 dBm sine.

  • IC1 - 74LS74D Dual D flip-flop
  • IC2 - 74AHC1G86DBV Single 2-input XOR
  • IC3 - 74LVC2G04 Single inverter
  • C1-C3 - 0.1µF
  • C4 - 10 pF
  • R1 - 1 MΩ
  • R3 & R4 - 50 Ω
  • L1 - 1.2 µH
  • C5 & C6 - 220 pF

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mini-DIN 6 breakout

by nsayer.

2 layer board of 0.90x0.60 inches (22.89x15.27 mm).
Shared on January 6th, 2017 01:39.

Accepts a CUI MD-40S or MD-60S. For the 40S, use pins 3-6 (corresponds to pins 1-4).

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Divide-by-3 v2

by nsayer.

2 layer board of 0.80x0.75 inches (20.32x19.05 mm).
Shared on July 7th, 2016 02:55.

2 D + 1 XOR variant. Circuit courtesy of Charles Steinmetz via the Time Nuts mailing list.

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GPS Disciplined FE-5680A v1.6.4

by nsayer.

2 layer board of 4.00x2.05 inches (101.60x52.15 mm).
Shared on July 7th, 2016 02:53.

See the Hackaday project page.

Almost the same as v1.6.3, but adds pi network to one output for a 13 dBm into 50 Ω sine port.

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Divide-by-3

by nsayer.

2 layer board of 1.00x1.25 inches (25.43x31.78 mm).
Shared on June 18th, 2016 22:25.

I have a 15 MHz Oscillator. My TIA accepts 1, 5 or 10 MHz. This board is a divide-by-3.

  • IC1 & IC2 - dual D flip-flops
  • IC3 - quad 2 input NOR gates
  • C1-3 0.1µF

Inspiration came from here.

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