Shared Projects by texaspyro

Two way banana post shorting strap for test equipment.

Order using the 0.8 mm thickness / 2 oz copper option.

Four-way banana post shorting strap for test equipment.

Order using the 0.8 mm thickness / 2 oz copper option.

For use with the HP-3458A insert the board from the side. The binding posts are spaced such that you cannot insert them from the top.

Outer oven controller for the HP10811 double oven oscillator based upon a design by Warren Sarkison.

The darlington power transistor should have a high beta at the oven current. I used a house-numbered part with a beta of around 1000.

IC1 is a dual op amp like a TL082.

C8 and C9 should be quality, low leakage caps.

R7/R8/R9 can be adjusted for different input voltages and oven currents.

The three pads on the right end of the board are for monitoring test points.

A voltage regulator / RS232 breakout board. Has mounting holes for Adafruit, CN06 (Ublox Neo 6M) and Trimble Resolution-T receivers. Others receivers can be wired to the board.

Silkscreen says CP3232 RS-232 converter chip. These are too picky about their caps. Use a MAX232A with all 0.47 uF caps (MAX232A’s seem to work just fine on 3.3V).

Regulator is any AM1117 compatible fixed regulator.

PWR RAW/REG jumper selects whether the GPS/MAX232A receivers power from the regulator or the input jack.

RS232 PWR jumper connects pin 9 of the RS232 connector to the DC input jack.

PPS polarity jumper selects polarity of the PPS pulse to the RS232 connector.

There is an 8-pin DIP pattern for an ATTINY85, etc processor.

Resolution-T antenna power is wired to Vcc, but there is a place to cut the etch marked on the board along with a hole for providing an alternate source of antenna power.

Osmocom LEA-6T GPS timing receiver board from:

http://openbsc.osmocom.org/trac/wiki/osmo-lea6t-gps