diff --git a/docs/about.md b/docs/about.md index ce92908..c7bde22 100644 --- a/docs/about.md +++ b/docs/about.md @@ -22,7 +22,7 @@ Electrostatic discharge can irreparably damage electronic devices. Use O-ESD wit ## Quick-start guide The O-ESD is powered up (or down) using the toggle switch located on the grip. The O-ESD user interface consists of: toggle switch (ON/OFF), fire button, USB battery chargers (optional), LCD, down button, up button, multi-purpose knob located on the left side of the LCD.
![Grip](img_grip.png)
-Once the O-ESD is powered-up the splash screen should appear for 1 s at the LCD. Afterwards, the main screen of the O-ESD shows up. LCD has four 20-character lines. Each line stands for one item. Items (i.e., lines) are selected by moving the selector “ > ” using up/down buttons.
+Once the O-ESD is powered-up the splash screen should appear for 1 s at the LCD. Afterwards, the main screen of the O-ESD shows up. LCD has four 20-character lines. Each line stands for one item. Items (i.e., lines) are selected by moving the selector “ > ” using up/down buttons.
If an item has a numeric value selectable by the user, the numeric value can be changed by rotating the knob. Some items have multiple choices (selections) or submenus (sub-items) available and those are accessible by pressing the knob.
![UI](img_UI.png)

There are two modes of operation
@@ -33,7 +33,7 @@ There are two modes of operation
(1) The first (top) item on LCD is the battery status. It displays the minimum of relative voltages of the two batteries. If the voltage of a battery drops below 3.5 V, the battery status displays that recharge is needed. Note that O-ESD will work even with very low battery voltage that may irreparably damage the batteries. Battery status has a submenu that presents extended information about each battery.
![Battery_extended](img_bat_ex.png)
(2) The second item is the operation mode. It can be either contact or air as selected by the used.

-(3) The third item is the ESD voltage level. The ESD voltage can be in the range from –12kV to 12kV in the case of contact discharge, or in the range from –15 kV to 15 kV in the case of air discharge. Note that the sign of the charge (polarity) is defined by the position of the cascade, i.e., it should be placed in the correct position in order that given polarity can be produced at the output.

+(3) The third item is the ESD voltage level. The ESD voltage can be in the range from –12 kV to 12 kV in the case of contact discharge, or in the range from –15 kV to 15 kV in the case of air discharge. Note that the sign of the charge (polarity) is defined by the position of the cascade, i.e., it should be placed in the correct position in order that given polarity can be produced at the output.

(4) The forth item (at the bottom of LCD) is
(4a) the total number of pulses in the case of the contact discharge or
(4b) the hold time in seconds for air discharge (i.e., the time window in which the rounded tip is at the predefined voltage until the air discharge happens).
@@ -143,6 +143,6 @@ Bill of materials (BOM) for O-ESD v0.5 can be found at [BOM v0.5](https://o-esd. Drawings, schematics, production files and photos of assembled parts can be found at [1-Hardware](https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/src/branch/main/v0.5/1-hardware) in separate subfolders.
[A sketch of O-ESD v0.5](https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/src/branch/main/v0.5/O-ESD_v0.5_drawing.jpg) and a photo of [O-ESD v0.5 assembled prototype](https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/src/branch/main/v0.5/O-ESD_v0.5_assembled.jpg) are presented.
[Software for O-ESD v0.5](https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/src/branch/main/v0.5/2-software) is available as well.
-Finally, the [measurements](https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/src/branch/main/v0.5/3-measurements) confirm that O-ESD v0.5 can produce standardized ESD current pulses for all contact discharge levels (2kV, 4kV, 6kV and 8kV, both positive and negative pulse voltage), as well as air discharge up to 15kV (both positive and negative).
+Finally, the [measurements](https://o-esd.etf.bg.ac.rs/forgejo/dragan.olcan/O-ESD/src/branch/main/v0.5/3-measurements) confirm that O-ESD v0.5 can produce standardized ESD current pulses for all contact discharge levels (2 kV, 4 kV, 6 kV and 8 kV, both positive and negative pulse voltage), as well as air discharge up to 15kV (both positive and negative).