I received my Convoy H1 today. After checking to make sure it was working properly, I did a quick disassembly to see how difficult it would be to modify. To my pleasant surprise, the head can be completely taken apart without any soldering or even removing of screws (there are none). Just remove the three retaining rings and slide the innards out.
I didn’t think until after I had it back together that I should have taken some measurements. Oops. Oh well, I can easily do that later.
I think I might have to built a new driver for this: either linear or FET+1, attiny MCU, and RampingIOS or NarsilM with aux LED control.
Unmarked MCU with PIC-style layout
One 7138C (constant current driver)
Four three-legged chips marked X0RB48 (small FETs, likely AO3400A)
Standard issue 16mm aluminum MCPCB
PS - I now have a Sofirn SP40 on the way. I can’t wait to do a head-to-head comparison .
Runtime tests on stock setup
Boy, this thing is HOT. And not in a good way… sitting on my desk (room temperature, no air movement), it reached 84°C. I definitely do not recommend running this thing on Turbo for extended periods of time unless you’ve got the perfect cooling environment.
If that SVG iamge doesn’t show up for you, a PNG version is available here
PS - I have a new MCU/firmware ready to go for this… customized RampingIOS on an ATtiny412. Added Aux LED control as well as control for the on/off FET. This headlamp is in dire need of the thermal regulation this will bring.
I’m not aware of any plans to do so. I know Simon (owner of Convoy) is going to be making some changes based on our feedback, but it doesn’t sound like he’s planning an emitter changed. When asked about using a High CRI SST20 or LH351D, he said:
Source (some good Convoy updates in that thread if you haven’t seen it)
One good thing here, though, is that the H1 uses a standard 16mm MCPCB. So if you feel somewhat comfortable soldering the wires to a new MCPCB, swapping in a new emitter is pretty easy to do.