Retro Tech & Electronics | Using a 2.8in SPI LCD Touchscreen ILI9341 with an ESP32 on Platformio @retrotechandelectronics | Uploaded February 2023 | Updated October 2024, 7 hours ago.
Today well be interfacing the 2.8 inch SPI LCD Touchscreen with the ILI9341 chipset to an ESP32 using the current release of Platformio, taking advantage of both display and touchscreen features, though well skip the SD card as its just an addon to the board not directly connected to these systems. I have a separate video for SD card interfacing. Out setup will not be powered through the ESP32 so I'm setting up an HW-131, a well known cheap DC power supply for this task.
HiLetgo ILI9341 2.8" SPI TFT LCD Display Touch Panel 240X320 with PCB 5V/3.3V STM32
amzn.to/3LtJIh8
First I'll make sure that TDT_ESPI library is installed into this example project. Ive updated platformio.ini to set the monitor speed.
Following library installation, within the project pio and libdeps folder some library configurations will be made in support of out device. In particular, setup 42 will be addressed in a few files. Once these changes are made the physical wiring will be made between the two devices as demonstrated in the video.
In PlatformIO, I first attempt an easy example, copying from examples into the source folder from under the 320x240 sub folder to ensure correct operation and wiring of the device, the example is working correctly. Following this, a touchscreen example is loaded for testing, we can see that it does not compile, but I show why Arduino IDE examples do not always work out of the box, once modified for platformio, it proves to also work correctly, completing this demonstration.
#esp32 #platformio #arduino
Today well be interfacing the 2.8 inch SPI LCD Touchscreen with the ILI9341 chipset to an ESP32 using the current release of Platformio, taking advantage of both display and touchscreen features, though well skip the SD card as its just an addon to the board not directly connected to these systems. I have a separate video for SD card interfacing. Out setup will not be powered through the ESP32 so I'm setting up an HW-131, a well known cheap DC power supply for this task.
HiLetgo ILI9341 2.8" SPI TFT LCD Display Touch Panel 240X320 with PCB 5V/3.3V STM32
amzn.to/3LtJIh8
First I'll make sure that TDT_ESPI library is installed into this example project. Ive updated platformio.ini to set the monitor speed.
Following library installation, within the project pio and libdeps folder some library configurations will be made in support of out device. In particular, setup 42 will be addressed in a few files. Once these changes are made the physical wiring will be made between the two devices as demonstrated in the video.
In PlatformIO, I first attempt an easy example, copying from examples into the source folder from under the 320x240 sub folder to ensure correct operation and wiring of the device, the example is working correctly. Following this, a touchscreen example is loaded for testing, we can see that it does not compile, but I show why Arduino IDE examples do not always work out of the box, once modified for platformio, it proves to also work correctly, completing this demonstration.
#esp32 #platformio #arduino
![Sears Silvertone Twin Twelve 1484 Major Restoration Project [3/6]](https://i.ytimg.com/vi/SAU2KmtoJUQ/hqdefault.jpg "Sears Silvertone Twin Twelve 1484 Major Restoration Project [3/6]
Here in part 3 we continue with preparation with turn-up by installing the pot needed for the hum balance which replaces the filament center tap. After this a dry run without tubes is conducted just to be sure everything is ok. If the tap cant meet 6.3 without tubes it cant be the right tap and i have to switch to the next one. Given the one at around 7 volts its time to add the tubes to the amp.
With all of the tubes in the amp we come to find that the final filament voltage is 5.9. It looks like another turn or two will be needed out of that transformer. A retest with 2.5 wraps shows 6.2 volts at 120vac.
Following this The temperature gun will be used to measure the heat off of the transformer after 30 minutes or so. No heat issues were found. To celebrate, the transformer covers were stripped and painted, as well as the rewiring of the reverb tank.
I break out the impedance bridge to test the cabinet and confirm the impedance at 8 ohms.
I found an extra speaker jack that was inappropriately added to this cabinet that I could remove to place the hum pot into. After that, its time for the first full smoke test.
I wish this amp had an adjustable bias..... also I discover at this time that the standby circuit is garbage. I end up having to use several tubes from Cornerstone music to find something that operates within safe parameters.
This brings the project into the noise isolation phase. and there is no shortage of noise in this amp; all sorts of different types of noise from different stages.
This starts from the finals backwards to the phase inverters. Where things are already looking strange.
#retrotechandelectronics #vintagetubeamprepairs")
