replacing the at 2S unreliable AMC7135s
DD + small FET and resistors instead
MT03/09R XHP70.2
support of permanent switch LED plus MCU indicator with resistors
30mm for Convoy L6/ Thorfire S70S
support of permanent switch LED plus MCU indicator with resistors
20-22mm with 2 FETs and also 6+1 AMC
here with 1S configuration with 6+1 AMC
I had to drill out one via on the spring side partially that secures the switch pad from lifting if soldered too hot
17mm 2S with 2 FETs
17mm LX v1.0 FET+5+1
more filtering caps for very high drain builds
Not sure where the best place to ask this is, so I’ll give it a try here. I had some boards made using: your ‘new’ 17mm TA layout. I built one in a 1s configuration with an ATTiny25v with no LDO, Zener or bleed resistor using recommended components and resistor values.
I flashed it with the bistro-TAv1-OTSM-HD-attiny25.hex file provided in the Bistro-HD v1.7.1 distribution.
It works great, except for one thing. The voltage readout is wrong. It usually reads out 4.2. I may have seen it go as low as 4.1.
My understanding is that the firmware I am using reads the voltage from Vcc. So I am really at a loss as to what could be wrong. My understanding is that 1.7.1 is pretty well tested for OSTM configs, but should I be using v1.4.1instead?
I got no idea what could cause this, I had never voltage readout making problems, sometimes the diode bridge was closed by solder paste and I got 4.4V readout
Thanks. I’ll have to refer to the schematics to better understand the extra caps.
I wonder if I bypassed the diode by mistake somehow. I cant remember how low I took the actual cell voltage. I know I haven’t tested it with low SoC cell, but I thought I’d check with a cell @ ~3.7.
I got atm not enough time to get ahead with the Boost, I made some progress just to run into a problem again
I ordered version 3 of prototyp boards 10 days ago, with enhanced thermal path to cool the MPS chip as I ran likely on 50W output into thermal problems I hope the new board will fix it
So I think final version of programming port found
rearranged pins to fit MCU pins arrangement better than original v1.0 had
improvement machanically
2 traces on the pogo pin board to self align it by the solder
increased pad size on drivers to 0.8mm, to compensate wrong pogo pins
length of the solder traces on board reduced as some flux went in the pogo top, can be solved with alcohol but more distance is better
Added a key head for easier handling
added 2 holes to use a wire strap to secure the programming wire
Picture of v1.1 on V1.0 board, pin alignment does not work on the small 0.6mm pad on first reflow