Post by plutronus on Nov 22, 2013 2:31:33 GMT -6
Kewl Gadgets for Folks Who Enjoy Fiddling Around With Wires
An TFT LCD Display with capacitive touch screen overlay, attached to arduino open-hardware microcontroller via a SPI (Serial-Peripheral-Interface) serial-buss gadget:
www.buy-display.com/default/3-5-tft-lcd-module-display-320x240-serial-spi-touch-screen-arduio.html
Home Page:
www.buy-display.com/default/
I just bought one of these (below) an HP6632A Laboratory Power Supply. Its really an excellent power-supply. It can do lots of kewl things such as constant voltage accurate to 1 uV (microVolt) or constant current accurate to 10 uA (microAmperes), or it can act as a programmable-load. I added two five-way banana jacks on the far right side (not in photo) so that I can power gadgets with it without having to move it get access to the rear panel connects. It weighs a ton, because its a linear anal-og power-supply which sports a BIG Honkin transformer. But its output is clean down to 1 uVolt because of that.
I added an orange LED to the dull, boring, un-illuminated grey LCD Screen, but due to the LCD display construction, I was only able to illuminate a portion of the full display area as can be seen in the attached photo.
I'm planning to yank out the orange/LCD display that's inside the power-supply now and then make a PCB interface board to go between the power-supply main-board for the new planned replacement LCD display.
I plan to use small (16 bit) Atmel microcontroller on the interface PCB to decode the internal LCD data-bus codes generated by the power-supply main-board, translate them into TFT LCD screen, configured to emulate (via homebrew fonts & symbols) the LCD. The replacement TFT LCD is a full color display which employes a 3 wire Serial-Peripheral-Interface, or 'SPI', in lieu of using the original 16 wire data-bus to the original HP grey LCD display panel. The microncontroller will do the conversion from 16 bit wide data-bus to the SPI data-bus. Its been a fun project so far. To decode the current LCD panel codes, I'll use my Tektronix TLA-704 Logic Anal-yzer to capture the codes in real-time when I instantiate the different panel functions. From the code analysis I'll write software to emulate those codes into the new planned TFT display screen.
plutronus
An TFT LCD Display with capacitive touch screen overlay, attached to arduino open-hardware microcontroller via a SPI (Serial-Peripheral-Interface) serial-buss gadget:
www.buy-display.com/default/3-5-tft-lcd-module-display-320x240-serial-spi-touch-screen-arduio.html
Home Page:
www.buy-display.com/default/
I just bought one of these (below) an HP6632A Laboratory Power Supply. Its really an excellent power-supply. It can do lots of kewl things such as constant voltage accurate to 1 uV (microVolt) or constant current accurate to 10 uA (microAmperes), or it can act as a programmable-load. I added two five-way banana jacks on the far right side (not in photo) so that I can power gadgets with it without having to move it get access to the rear panel connects. It weighs a ton, because its a linear anal-og power-supply which sports a BIG Honkin transformer. But its output is clean down to 1 uVolt because of that.
I added an orange LED to the dull, boring, un-illuminated grey LCD Screen, but due to the LCD display construction, I was only able to illuminate a portion of the full display area as can be seen in the attached photo.
I'm planning to yank out the orange/LCD display that's inside the power-supply now and then make a PCB interface board to go between the power-supply main-board for the new planned replacement LCD display.
I plan to use small (16 bit) Atmel microcontroller on the interface PCB to decode the internal LCD data-bus codes generated by the power-supply main-board, translate them into TFT LCD screen, configured to emulate (via homebrew fonts & symbols) the LCD. The replacement TFT LCD is a full color display which employes a 3 wire Serial-Peripheral-Interface, or 'SPI', in lieu of using the original 16 wire data-bus to the original HP grey LCD display panel. The microncontroller will do the conversion from 16 bit wide data-bus to the SPI data-bus. Its been a fun project so far. To decode the current LCD panel codes, I'll use my Tektronix TLA-704 Logic Anal-yzer to capture the codes in real-time when I instantiate the different panel functions. From the code analysis I'll write software to emulate those codes into the new planned TFT display screen.
plutronus