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Robot 100kg the jeep, ELECTRONICS

this page will cover all sorts of electronics not allready explained in the other sections of the pages


electronics-block-diagram.png

 


electronics-osd-done.jpg On Screen Display, video selector, GPS
All parts are own design done many years ago for other projects, now reused here.

 


electronics-osd-inside.jpg

CONNECTOR PINOUTS OSD:

DB9 MALE, ORANGE COLOR
1 9V input (power from the cam remote ptz controller ??)
2 Temperature 1, input 1V max LM60 (T2 is internal)
3 BEC volt, RSSI input
4 V1 battery voltage 24V (from 24 to 9V converter)
5 Current Measure input (from sense resistor gain amplifier)
6 Gnd input
7 Gnd
8 R/C servo signal input for video selector
9 R/C servo signal input for OSD

 


electronics-sense-amplifier.jpg the current sense resistor is 1.5mOhm, here is the amplifier for OSD reading

 


electronics_video_transmitter_20200303_172541.jpg the video tx is made from a 200mW module, and a 20Watt module
This module is a spare from an old rocket project, so it is made to handle vibrations and seawater

 


electronics_smps_vid.jpg Powersupply for the Video Transmitter, based on some old boards i designed many years ago PT6304R 16-38V input, 12V out 3A
I like this module a lot, for its wide input range, and wide output voltage trim, both up and down, very usefull, just too bad it is obsolete.

 


electronics_modem_TX_0908.JPG Modem here the TX side, the RX side looks the same, uses a DS8500 chip
This module is also a spare from an old rocket project, i designed this one many years ago


electronics_smps_arduino.jpg Powersupply for all Arduino units, based on some old boards i designed many years ago PT6304R 16-38V input, 12V out 3A
I like this module a lot, for its wide input range, and wide output voltage trim, both up and down, very usefull, just too bad it is obsolete.

CONNECTOR PINOUTS :

DB9 MALE, RED COLOR
1 24V input (power from the powerpanel)
2 nc
3 9V out via 1N4001
4 9V out via 1N4001
5 9V out via 1N4001
6 Gnd input
7 Gnd
8 Gnd
9 9V out via 1N4001

 


electronics_PID_inside_mega_case.jpg funny they wrote wrong RX TX on serial 1 cheap clone mega board

 


electronics_PID_inside_pots.jpg Adding 4 pots for PID and multiplier, this way it is easier to adjust the critical parameters

 


electronics_PID_done.jpg Added a nice display so i can see the PID parameters live
USB port is serial 0, 115200 baud left motor PID all values output live for curves

CONNECTOR PINOUTS :

DB15 MALE, BLUE COLOR
1 9V input, (via 1R resistor and 15V zener)
2 nc
3 TX1 out, to motor power drive optocoupler 9600 baud
4 +5V via resistor, to motor power drive optocoupler
5 RX2 input 9600 baud, from tacho counter (100mS updates all synced to this)
6 RX3 input 9600 baud, from setpoint unit
7 nc
8 nc
9 GND
10 GND
11 GND
12 GND
13 GND
14 GND
15 GND

 


electronics_setpoint_ppm_to_serial2.jpg Setpoint unit, takes PPM from R/C rx
this is the unit we will change to ROS node format in the future, to be able to create a SLAM self driving robot

CONNECTOR PINOUTS :

DB9 MALE, YELLOW COLOR
1 9V input (arduino power)
2 analog A
3 analog B (auto detect if connected joystick for drive test)
4 ppm input
5 serial 9600 out to PID
6 Gnd power
7 Gnd signals
8 nc
9 5V out for analog joystick

 

END of this section, NOT COMPLEETE YET