Hyjeia FAQs


These are some of the questions I’ve been receiving on the system as well as my answers:

Do you have a list of components to fabricate the electronic card?

[AKB] Yes, in the /hw directory on github, you will find the BOM. That will have the component list

For the LCD can I use [SOME RANDOM LCD]? It’s an LCD 16×2 I2C 5V White on Blue English/Japan Transmissive

[AKB] I’m not sure. I use the “Arduino-LiquidCrystal-I2C-library” which supports Hitachi HD44780 compatible LCDs via I2C. You will have to check compatibility with that library or replace it with a different one. I don’t think it would be much work though to replace.

I don’t see the die size information ( 0,076mm²) in the GUVA-12SD Data sheet. Where have you got this information ?

[AKB] You want the Genicom datasheet, not the Roithner LaserTechnik one. It has the die size information in it.

Firstly, I want to use the dosimeter manually? If I don’t implement the wireless components ( AT86RF212 etc..) on the PCB. Is the µP AT MEGA run ? Because OSC1 is generate by RADIO_INT (IRQ AT86..)

[AKB] I’m using the internal RC oscillator on the ATMega so I’m not using the OSC1 and OSC2 pins. Instead, I feed the interrupt from the radio into OSC1. If you don’t use the radio, you can leave this off. The radio does not need to be used for the system to work. It’s mainly for operator safety since they can monitor dosage and intensity remotely.

The measurement begins when the power on ? When the dosage value is obtain we have to push the reset button  to reinitialise a new measurement? Is it true ?

[AKB] At the time of this writing, there is no way to reset the counters except with the reset button. I’ll change that later, but I kind of rushed the system out in case it was needed. Now that it’s out, the features will be improved incrementally.