Zagadka's Site

The remote power supply for the cherry lights and the RGB garden lights is now complete. This will eliminate one sonoff which was previously used to control the cherry lights on the mains side.

I took the grill out of my gas BBQ and put some charcoal baskets in to try out my new rotisserie. It turned out well, bit of a learning curve with the charcoal though...

Caught a massive fish...

Created a power supply controller for the garden lights to turn on and off the set of standard cherry lights and supply the IOT garden lights with power also. Each (24vAC and 12VAC) are controllable via relays. It also has a rectifier and DC-DC convers to supply 5V and 3.3V for other projects and the ESP8266 controlling the PSU.

Bacon wrapped chicken thigh fillets with mash and veg. This was a real crowd pleaser.

Today I converted the garden lights to run off AC rather than DC which I think will work out better. I've added a bridge rectifier and smoothing cap to each.

Created a 24 disk RAID 0 for S&Gs on the Supermicro storage server. It has a ASR-52445 in it.

Today I got another set of component drawers, the same manufacturer as the other set, just with larger drawers.

6 racks of ribs on the BBQ =) This time I cheated with the rubs rather than making my own usual recipe. McCormick Tenesee Smokehouse and Slown & Low Texas rubs.

For the first time I blew up an ESP8266. Which is difficult to do, they are pretty robust. This one is kaput though =/

The remote lock/unlock for the car has these weird surface mount buttons on them. They have a rubber plunger and they are not tactile. These needed replacing because they started to fail. I took a gamble on some surface mount tactile switches from ebay (a few bucks for like 20). They fitted well and give you a much more obvious click feeling when you press.

I found a place to inject 5v so you can flash the sonoff and test the relay is functioning.

This evening after a session of DarkMatter great progress was made on the SonoffMQTT project. This project aims to replace the firmware on a Sonoff with custom firmware so that it is accessible via MQTT instead of the supplied eWeLink. Having it available on MQTT means it will plug directly into Home Assistant and will be cointrollable from there. After soldering some headers into the board, I was able to power it externally (not mains) and flash it using Arduino IDE.

Flashing Sonoff with custom firmware. To do this you have to externally power the Sonoff with 3.3v via the header. This, however, does not allow you to operate the relay because the coil is on the 5v relay.

A pretty productive day. The code has now been refactored to accept simple non-json type commands on specific topics ie <uuid>/relay/0/set. This allows the relays to work with the "switch" function in Home Assistant.

After some refactoring of the dual relay board code, it's now reporting temperature, humidity on MQTT topics. This means it will work correctly with Home Assistant.

The storage server got an upgrade to E5-2620v1s.

Updated design with larger resistors and the missing silk screens added.

This is a temporary repair on an iPad 4 until a propper glass screen / digitizer replacement is done. The void filled with silicone andcovered with kapton tape to keep the glass together.

I received a dodgy batch of DC-DC converters. These are pretty common 12-19V in and 3.3V out. The top one is a dodgy one from the supplier. The bottom one is working unit from another supplier. You can see that the resistor and capacitor (between inductor and chip and between chip and bottom left solder pad) are transposed. They probably just loaded the wrong reels. I can fix these but it's a pain in the butt. The seller ended up giving me a partial refund. The middle is where I've desoldered the R and C and swapped them to their correct positions. The issue, however, is that the R is incorrect also resulting in 3.6V... I'll need to buy some parts and fix them.