Electronics > Projects, Designs, and Technical Stuff
JBC-mini - a low cost T245 handle controller
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poorchava:
I will look into that. In principle this should not pose much problem. It will require additional set of MOSFETs and optocouplers. Opamp that I chose is already a dual channel one, so no problem there.

I think my project is quite economical:

T245 handpiece - 63€ (TME)
some tip, eg C245939 - 35€ (TME)
24V, 150VA toroidal transformer - 19€ (toroidy.pl - local Polish manufacturer), almost any other transformer can be used (i use 12V/300VA in the prototype and it works just fine)
STM32F051K6 - 2.5€ (Farnell)
RPC1-6RB-12P connector - 2.8€ (Farnell)
PCB - ~2€/piece from Elecrow if it fits on 10x10cm format
MCP6V02 opamp - 2.2€
Enclosure - http://www.kradex.com.pl/shop?product=287 Local Polish manufacturer, they have english version of the website but i dunno if they ship abroad. If anything, I can buy and distribute that to people. Anyway - appropriate enclosure is under 2€.

Other bits and pieces like displays, encoder, optocouplers, trimpots and the like can be had from anywhere or from junk, so I won;t bother listing them, as anybody probably has them in their junkpile. So the control units sums up to 30€ for major components. Even assuming that the rest will cost another 30€, this is still cheap :)
tautech:
I love a good rats nest.  >:D
Keen to see your finished PCB.
dannyf:

--- Quote ---So the control units sums up to 30€
--- End quote ---

I think I can get mine under $10:

mcu: <$2.
led display: <$1.
mosfet: <$1.
encoder: $1.
misc. parts: $1.
laptop power supply: free.
poorchava:
I don't doubt that, but JBC T245-A handpiece and C245 cartridges are superior to hakko, especially when it comes to power and ability to handle large thermal masses which is important to me as I do quite a lot of power electronics.

poorchava:
Some update :).
I have selected an enclosure and made a PCB for it.




I'm hoping to order the PCB some time soon.
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