One year ago I wrote a blog post about the required DiveIno parts and its expected cost. Now I think it is the time to revisit this topic and update the list.

## What will you need?

The virtual DiveIno construction kit includes these parts:

1. Dry Case
2. 3D printed sensor and on/off switch
3. Microcontroller board
4. TFT LCD screen
5. SD card
6. Fabricated PCB board
7. Other electronic parts soldered onto the PCB
8. LiPo battery
9. Infrared remote control

## Detailed list

### Dry Case

The OtterBox Pursuit 40 dry box is required to build DiveIno. Please make sure that you buy the clear version! Don’t buy the smaller OtterBox Pursuit 20 case, because it leaks.

### 3D printed parts

The on/off switch and the pressure sensor cases have to be 3D printed. The STL files can be downloaded from the Models folder on GitHub.

### Electronic parts

The following parts are required:

Optionally the DS3231 Precision RTC Breakout can be replaced with an inexpensive Chinese DS3231 Real Time Clock module.

### Other tools

Besides the electronic parts, you will need some hand tools, a soldering iron, a drill etc. Maybe you can consider to buy Ladyada’s Electronics Toolkit or Sparkfun Beginner Toolkit.

You will also need a 2 component epoxy glue like the Pattex Power Epoxy Instant Mix Glue, which can be bought in a local hardware store.

## Cost

As I said before you have many options to order parts. You can go for original parts or try to replace some of them with Chinese clones. Hand tools, soldering stuff, resistors, headers, piezo buzzer, transistor etc. can be bought in the local electronic store.

If you would like to order original parts, you have to order them from two online stores:

I tried to narrow it down to one provider, but for instance the LiPo Fuel Gauge and the MS5803-14BA Pressure Sensor Breakout can only be bought at Sparkfun.

It would be really good to know the expected cost of your DiveIno parts, so I made the following table, which lists original parts in USD:

Supplier Part Price
Amazon OtterBox Pursuit 40 Clear case $69.95 Amazon Pattex Power Epoxy Instant Mix Glue$12
Sparkfun Arduino Due $49.94 Sparkfun LiPo Fuel Gauge$9.95
Sparkfun MS5803-14BA Pressure Sensor Breakout $59.95 Sparkfun BC548C NPN transistor$0.5
Adafruit Lithium Ion Polymer Battery - 3.7v 1200mAh $9.95 Adafruit PowerBoost 500 Charger$14.95
Adafruit Bluefruit LE UART Friend $17.5 Adafruit DS3231 Precision RTC Breakout$13.95
Adafruit SPDT Slide Switch $0.95 Adafruit TSOP38238 IR Receiver Sensor$1.95
Adafruit Mini Remote Control $4.95 Adafruit Blue LED - 3mm$5.95
Adafruit Piezo Buzzer $0.95 Adafruit Through-Hole Resistors - 470 ohm$0.75
Adafruit Through-Hole Resistors - 10K ohm $0.75 Adafruit Through-Hole Resistors - 22K ohm$0.75
Adafruit Through-Hole Resistors - 220K ohm $0.75 Adafruit 36-pin Female header$2.95
Adafruit 36-pin Break-away Male Header $4.95 Banggood TFT LCD Display Module$9.89

If you sum up everything, the price will be around $294.18. If you add$50 for PCB fabrication, $20 for 3D printing and some hand tools,an SD card etc. You can easily end up in the price range of$400. It seems to be a bit too much for a DIY dive computer. The next question is how can you save some money?

## Save

First of all let’s assume that you have the required hand tools. You can also save on PCB fabrication, if you plan ahead, look around and can wait some time. The same goes for 3D printing. Let’s plan a $40 budget for 3D print and PCB fabrication. The next saving point is to use after market parts instead of original ones. For instance you can order an Arduino Mega microcontroller board clone from Banggood instead of Sparkfun. You can also buy resistors, piezo buzzer, headers, transistor, LED in your local electronic shop. I think you can buy these around$5. You can also buy the Pattex glue in a hardware store about $5. From some parts, you have to use the original version, but you can buy it from other sources. For instance I bought my OtterBox Pursuit 40 Clear case on eBay in half of the original price. You can also buy the pressure sensor breakout on eBay around$35.

Considering these savings options, let’s create another cost breakdown:

Supplier Part Price
eBay OtterBox Pursuit 40 Clear case $30 eBay MS5803-14BA Pressure Sensor Breakout$35
Sparkfun LiPo Fuel Gauge $9.95 Adafruit Lithium Ion Polymer Battery - 3.7v 1200mAh$9.95
Adafruit PowerBoost 500 Charger $14.95 Adafruit Bluefruit LE UART Friend$17.5
Adafruit SPDT Slide Switch $0.95 Banggood Arduino Mega 2560 R3 Development Board with 3.2 Inch TFT LCD Display Module$17.69
Banggood DS3231 Real Time Clock module $2.19 Banggood Infrared Remote Control$3.19
Local Resistors, Piezo Buzzer, LED, Headers, Transistor $5 Local PCB fabrication and 3D print$40
Local Pattex Power Epoxy Instant Mix Glue $5 If you sum up again everything, the price will be around$191. I think \$200 for such a DIY dive computer is quite a nice price. It is less then an entry level Suunto Zoop Novo dive computer.