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--- raspberrypi:start [2019/01/24 00:33]
dwheele [MCP4725 DAC]
+++ raspberrypi:start [2020/06/25 16:27] (current)
dwheele [7-Inch 1024x600 Touch Screen]
@@ Line 239: / Line 239: @@
 ===== 7-Inch 1024x600 Touch Screen =====
-Also purchased a 7-Inch 1024x600 Capacitive Touch Screen, which serves as a small HDMI monitor. Had to use regular monitor temporarily to set up configuration at ''/boot/config.txt''. Added these entries to support 1024x600:
+^Resolution|1024x600 (aspect ratio ~1.71 (128/75))|
+^Amazon|[[https://www.amazon.com/gp/product/B075QCXLPF/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1|Detail web page|
+^Version|v2.04|
+^Manufactuer|GeeekPi|
+^Size|SVGA Wide|
+^Purchased|1/14/2019|
+Purchased a 7-Inch 1024x600 Capacitive Touch Screen, which serves as a small HDMI monitor. Had to use regular monitor temporarily to set up configuration at ''/boot/config.txt''. Added these entries to support 1024x600:
 <code text>
@@ Line 261: / Line 268: @@
 ===== MCP4725 DAC =====
-This is I2S compatible. Worked well the first time. The problem is that I need a lot of these, and normally you can only have two, selectable with an A0 address line.
+This is I2S compatible. Worked well the first time. The problem is that I need a lot of these, and normally you can only have two, selectible with an A0 address line.
+It is rated at 25 ma of output. Connected to aviation simulator instrument, it only consumed about 0.5 ma, so connected directly to it.
+https://www.adafruit.com/product/935
+This could be multiplexed.
+It can also be connected to an external op amp, e.g., LM358
+This shows simple comparator, and simple gain amp: https://www.youtube.com/watch?v=g3TybiZHQ-A
 ==== Problem to use more than two ====
@@ Line 268: / Line 285: @@
 https://learn.adafruit.com/adafruit-tca9548a-1-to-8-i2c-multiplexer-breakout
+===== To Code With C =====
+Using "Geany" - an IDE which is installed and comes with Raspberry Pi. It is a GUI app, but can run it remotely from Windows via vnc server.
+**On Raspberry Pi**
+  * Run ''vncserver''
+  * ''vncserver :1 -geometry 1920x1080''  to set up a larger window.
+**On Windows**
+  * Run VNC Client. Connect to pi 192.168.0.8. Login with "pi" credentials (regular ssh login).
+  * You can see the GUI. Launch Geany
+===== Trying VisualGDB =====
+[9/21/2019] Because I'm doing more programming for the Raspberry Pi, decided to try VisualGDB. This is a go-between which lets you develop in Visual Studio C++, and then build/run on Raspberry Pi.
+  * https://visualgdb.com/download/
+After reviewing some of this, it is very complicated. Trying to use Geany instead on the Raspberry Pi. The code for this is not that involved.

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