Maybe use a switched resistor approach. Low-cost reed relay would do the job.
I remember this circuit :) However, its DC response will vary from device to device due to different Vth of JFETs; it will also vary with temperature.
I meant using tantalum caps at the SET pin of LT304x. This is the most sensitive pin. LT304x has quite good PSRR, but every noise on SET pin is amplified and present at the output.
reference grounding is done on purpose?Yes. It is done on purpose for a continuous reference plane for critical analog signals.
I meant strange connections of GND in voltage…
if you want to keep the noise low, avoid X7R/X5R capacitors in the current source circuit due to microphonic effect. related parts: C69, C70, C192, C13 (!), C172, C173, C152
add dual footprint for LTC6655 as we do in Stabilizer/Sampler etc, it solves issue with component availability
add LEDs for critical power rails, just use 1mA current add testpoints with labels for cricital power rails
FB8,FB9 have very low impedance in kHz region. They are good do decouple RF. I'd replace them with standard inductor; make sure you place lossy capacitor ( poor tantalium or series RC) after the…
you are using a lot of tantalium caps; the low ESR ones are expensive, I'd replace some of them by ceramic ones. If you need some non zero ESR, just add 0.5Ohm resistor in series.
pls make 3D model of the laser module and install on top of Kirdy to make sure there is no conflict.
there are grounding resistors close to the panel fixing holes. PLS add 3D model and check if they aren't too close. The USB may not be well positioned and may not protrude through the panel the…
there is MCU extension connector, do you plan some mezzanines in the future? I'd route 12V as well and add some mounting holes
I'd add mounting holes for laser module. At least 4, with soldered Wurth standoffs. Look how I did in Thermostat EEM