In two previous postings on the Haydon Chronometer here on the L1011 blog I have gone into detail on the general hardware and the pinout for the Haydon Chronometer. They are actually really neat instruments and not so difficult to control. I have created a very small setup that uses an ATMEL ATmega chip to create the two phase signals with. In the most simple form the clock could really be driven by using either a 60Hz AC source and a few caps for the phase shift or a 555 to create the two phases with. However, I prefer using a micro controller because I wanted to play around with different waveforms. I am excited to see Roberto use the setup as well in his B737-200 cockpit. Here are two images of the clock powered off (the red dot indicates no-power) as well as the backside of the clock with the original Deutsch connector. The connector was cut from the original L-1011 cockpit at about 4 inches after the connector ... so I had to repair the cable with 12 cable splices. I used a twisted shielded pair cable for the phase signals.
Below is a short video that shows the functions of the A. W. Haydon Company Chronometer.
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