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Profile for nsayer
Shared projects
Hi Density Groundplane Perfboard
by
nsayer.
2
layer board of
4.09x4.09
inches
(103.94x103.94
mm).
Shared on
April 1st, 2017 04:26.
Ordinary perfboard suffers from a couple of problems… First, it has no groundplane, so there’s nothing to prevent excessive radiated noise. Also, today’s parts tend to have much higher density leads, meaning the holes must be drilled closer together. The added groundplane and plated through vias also will aid in heat dissipation by acting as “chimneys,” as if often done with high density surface mount power devices.
NOTE: This was an April Fools joke.
Divide by 1.5 v1.0
by
nsayer.
2
layer board of
1.05x0.75
inches
(26.67x19.05
mm).
Shared on
March 13th, 2017 14:03.
This design is untested, but the theory is sound.
15 MHz goes in, 10 MHz comes out.
- IC1 - 74LS74D
- IC2 - 74LVC2G86
- IC3 - 74LVC2G04
- IC4 - 74LVC1G17
- R1 - 1 MΩ
- R2 - 1 kΩ
- R3 & R4 - 50 Ω
- C1 - C4 - 0.1µF
- C5 - 10 pF
- C6 & C7 - 220 pF
- C8 - 22 pF
- L1 - 1.2 µH
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
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).
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.