This is a short note about the upgraded version of my old EQMOD adapter for telescopes. Technically, this device it’s a USB – UART adapter with galvanic isolation. That’s why it might be used not only for telescope control. It’s a third revision of the board.
Category: Electronics
Initial analysis of the Starlink router gen2
It was fun to do reverse engineering of the original Starlink router. The article was also well received. Sure, it would be great to do the same thing with the new Starlink router gen2. It’s not easy to get new hardware, but why should this stop the fun?
Reverse engineering of the Starlink Ethernet adapter
The new generation of the Starlink terminal was released at the end of 2021. The Dishy antenna is square now, and a completely redesigned indoor unit combines a WiFi router and power supply. The new design should be more cost-effective, so there is no AUX Ethernet port on the router, only WiFi. Later SpaceX released an official Ethernet adapter that…
Analysis and reverse-engineering of the original Starlink router
While waiting for my Dishy, I decided to find and buy the Starlink router separately. Sure, it might be just a WiFi router, but it was very curious what’s inside. Spoiler: there are some interesting implementation details. Lucky enough, I found the router on eBay. It’s the first generation of the router. Currently, it’s impossible to buy (separately) the second…
HackRF SuperCluster
Who’s following me on Twitter probably knows some details. I believe this is my most expected article. Last year I came up with the idea to build a wideband SDR. It’s fun to monitor a wider spectrum and some signals. Sure, USRP is cool but too expensive for amateur usage. I had a few HackRF boards, so I ordered more…
Housing for the 1PPS/Square clock 8 channel distribution amplifier
While experimenting with my clock distribution amplifier, I found that this board creates a lot of interference to my HackRF receivers. Plus, it’s not very convenient to work with a bare board. I decided to build metal housing for this board. This is just a little note about its construction and some nuances.
Tesla Model 3 US – LTE modem replacement (And some reverse engineering)
Recently I bought a used Tesla Model 3 delivered from the US. It was an excellent deal. The car is in great shape and condition. Since I’m in Europe, there are few nuances with this car. One of them is an American LTE modem. American and European LTE frequencies are slightly different; that’s why the original modem is not working…
1PPS/Square clock 8 channel distribution amplifier
This is a “production” version of my 1PPS distribution prototype. Now, this device supports 1PPS and Square clock signal distribution for 8 consumers. The new device is designed with lower delays and flexible configuration in mind. You can find the schematic and all required production files below.
1PPS distribution circuit
1PPS is a great way to synchronize multiple devices and measure time intervals. A typical source of the 1PPS is a GPS receiver. This clock is disciplined by GPS atomic clock and has a reasonable precision. GPS receiver 1PPS output should have enough loading capability, but it’s a good idea to use a buffer. Especially when voltage level translation is…
Hacking Bluetooth speaker/FM radio firmware
I have a little Bluetooth speaker/FM radio. This speaker is not perfect, but it is nice for its price. Except for a few annoying things regarding sound notifications. I decided to “fix” those issues. A little bit of reverse engineering was involved.