Update: You can download the Eagle PCB files for the PPS Pulse Width Extender here. The PCB is made to fit the Hammond 1455C802BK enclosure. I have two Stratum-1 NTP servers using Raspberry Pi 2’s as servers. But the two setups are entirely different. My primary NTP Stratum-1 server is available at ntp.jacken.se, but it is also […]
[Continue reading]Raspberry Pi NTP Server LCD Status Display
The last couple of weeks I’ve been busy building a Raspberry Pi 2 Raspberry Pi 3 connected to my Trimble GPSDO using the 1 PPS output. The Trimble unit synchronizes with the atomic clocks onboard the GPS satellites, and the precision is fantastic! I bought the GPSDO to get a 10 MHz lab reference for my measure equipment, […]
[Continue reading]Philips-Fluke PM6665 Frequency Counter with Oven Controlled Crystal Oscillator
Upgrading a Philips-Fluke PM6665 Frequency Counter with an Oven Controlled Crystal Oscillator – Up and Running! I needed a frequency counter for my little lab at home. Naturally, I wanted an HP Agilent 53132A or similar, but it’s way too expensive for my modest use. So I browsed around eBay and found an old Philips-Fluke […]
[Continue reading]Speeding up your SPI MAX7219 LED displays using a modified Arduino LedControl Library
Speeding up your SPI MAX7219 LED displays when using Arduino and LedControl Library In preparation for the arrival of my GPSDO[1], I’m doing a quick build of an “Atomic Clock” display to have above my lab equipment. I’m using a cheap, small eight digit red LED SPI-controlled display. It uses the MAX7219 controller that I got […]
[Continue reading]Upgrading a Philips/Fluke PM6665 Frequency Counter with an Oven Controlled Crystal Oscillator OCXO
I’ve finished the OCXO upgrade. Read about it here While browsing on eBay for my new lab at home (I’m getting into electronics again), I came across a Philips PM6665 Frequency Counter, an old but functional unit so I couldn’t resist, I had to buy it. So I downloaded the Users Manual and Service Manual […]
[Continue reading]- « Previous Page
- 1
- …
- 7
- 8
- 9
- 10
- 11
- …
- 37
- Next Page »