So at first i want to introduce myself, I am from Germany and I am a 21 year old electronic-student. So please don't be too hard to me, because English is not my main language and i haven't used my English for a long time, but i think you will understand me
I'm very thankful for this thread, because it was the primary idea for my project and without this thread, I wouldn't have done it!
I bought the Chrony half a year ago and it didn't worked indoor because of the light. So I decided to build my own lighting, but it didn't worked and looked very well. That was the reason to buy the original lighting system (about 65€). After 2 weeks the lighting system arrived and I had to observe that the transformer is working with 110V not with 230V. I know there are adapters but I didn't want to use one.
So my idea was to provide the Chrony and the lighting system with a Lipo-Battery (18.5V, 5000mah).
After searching via google I found this site, and saw that there is a way to use a bluetooth connection...okay a lot of input... . After three days of thinking I knew what i have to do:
Here are my requirements:
- Using a battery (runtime over 10h)
- Undervoltage Shutoff (if you forget to turn the Chrony off)
- Voltage Indicator via Duo-Led (Green, Orange, Red)
- Bluetooth with range >50m
- Chargeable without effort
- "Clean" optic (It should not look unprofessional)
So let's start with some pictures:
Here you can see two Bluetooth modules (BTM222 - maximum range 100m) and 4 Step-Down Converters (Pololu 9V and 5V). Don't wonder yourself, i am building two Chrony's (for me and a friend of mine)
So that is the inside of the Chrony, i have used hot glue to hold the connector in place. The connector is used to charge the Chrony. The eight pins of the connector are used for plus,minus and six of them are used for balancing the individual cells.
Here you can see the loading cable:
And the charger from ebay for 30€.
I have used the following battery.
Turnigy 18.5V 5000mAh (35€)
I wanted to provide the lighting system with voltage over the rods. But at first let me show you some pictures.
Here ("plastic thing") are the short brass jacks in it. The wires are soldered with the brass jacks.
http://fs1.directupload.net/images/141228/oc6ply4k.jpg
long&short brass jacks and two "connectors"
http://fs1.directupload.net/images/141228/pisr2dnm.jpg
It fit's well
http://fs2.directupload.net/images/141228/dwa93tst.jpg
http://fs1.directupload.net/images/141228/ga93jeck.jpg
http://fs2.directupload.net/images/141228/3xp9lf4h.jpg
Aluminium rods
http://fs2.directupload.net/images/141228/ysqofwe4.jpg
http://fs2.directupload.net/images/141228/vnyqfbkv.jpg
Short test...
http://fs2.directupload.net/images/141228/s5w3ok5s.jpg
Okay so I hope you can understand me...I have used aluminium for the rods because the original ones were to hard to cut a 3mm thread in. With my lathe I made the brass jacks. The jacks have an outside diameter of 5mm and a 2.6mm drilling. The connector has an outside diameter of 2.5mm.
So you need 8 brass jacks for one Chrony. Four in the lighting system and four in the black "plastic thing". I also have build in a bridge rectifier in the lighting system, so it does not matter how you put them on the rods (polarity protection).
On the next picture you can see the battery in a non-flammable bag.
http://fs1.directupload.net/images/141228/c74sonyx.jpg
And yeah it does not only look tight - it's really tight
Here you can see the Duo-Led (Green, Orange, and Red)
http://fs2.directupload.net/images/141228/29sl83p2.jpg
Green
Orange after 6h Runtime
Red after 10h Runtime
http://fs2.directupload.net/images/141228/cwvc5w3e.jpg
http://fs1.directupload.net/images/141228/tga88oeh.jpg
The main circuit with undervoltage protection, 2 Step-Down Convertor 9V and 5V, one Step-Up Converter for the lighting system 25,4V, the circuit for the duo-led...
http://fs1.directupload.net/images/141228/calwtwe9.jpg
If there are any questions feel free to ask me. The Chrony works perfect Runtime is 13,5h. Bluetooth Connection also works perfect but the greatest distance was 40m over this distance the connection isn't fast enough and it doens't work well.
Greetings from Germany
Johannes