#1850

Рет қаралды 4,903

IMSAI Guy

Ай бұрын

Episode 1850
I layout a board:
www.pcbway.com/project/sharep...
Be a Patron: / imsaiguy

Пікірлер: 29

@jms019 Ай бұрын

Strong feeling it wouldn’t work without the dog on the PCB.

@robinbrowne5419 Ай бұрын

IMSAI Dog is always in control 👍

@AndyFletcherX31 Ай бұрын

Good to see you selected a green board - as they say: Green is good for the environment :)

@reinerfranke5436 Ай бұрын

Two assumed matching optocouplers do not provide the same linearity as a servo optocoupler with a single diode and two phototransistors. That is because the current to light and reverse linearity of the phototransistor is higher than that of the diode. Btw thermal droop is also a significant effect in the diodes and vary strong with the mounting thermals.

@SLeslie Ай бұрын

In KiCad you can use num-slash to change where to place the bend at 4:00 before clicking to place the track.

@byronwatkins2565 Ай бұрын

You can reduce the grid size for routing so that the router has more flexibility.

@andywlala Ай бұрын

Should have used U1B as the virtual ground.

@IMSAIGuy Ай бұрын

You are right. Forgot I had a free one

@herbertsusmann986 Ай бұрын

I noticed that some of your silk screen reference designators (ie R2, C5, etc...) were placed under the component. This means once the parts are installed you won't be able to see those designators. I always try to place them outside the part so after the board is assembled you can still see the R number or C number or whatever.

@gretalaube91 13 күн бұрын

Good idea! I'm running low on my old tube of Bournes 1:1 600 ohm transformers. 73's W3IHM

@ljubomirculibrk4097 Ай бұрын

Geting output to optical fiber might be interesting. For high noise imunity preamps.

@bob_mosavo Ай бұрын

Thanks 👍

@irgski Ай бұрын

Good ref for unused op amps: You Tube: “Engineer It: How to terminate an unused op amp.”

@ReneKnuvers74rk Ай бұрын

9:01 the +12V LV side from the header to the decoupling cap is taking quite a detour through a via. Are you building an LC filter? 😉

@bigbazer Ай бұрын

Thank you for the kicad demo, it's definitely a great bit of free software. Is it possible to simulate your circuit in kicad?

@IMSAIGuy Ай бұрын

I recommend microcap (free) kzfaq.info/get/bejne/g9l2nq2F1dnLlH0.htmlsi=wj63F77rc86FjejH

@bigbazer Ай бұрын

@@IMSAIGuy That microcap software looks interesting. But I use Linux and as far as I know, there's only kicad that will simulate on it. BTW I'm completely new to electronics, so I'm learning a lot. Thanks.😁

@andymouse Ай бұрын

@@bigbazer I recommend TINA (Texas Instruments) as it is also free. Kicad will simulate but its very young and tricky to use if your not an advanced user, it is work in progress.

@bigbazer Ай бұрын

@@andymouseHi, unfortunately it looks like Tina is a windows base software 🫤

@andymouse Ай бұрын

@@bigbazer Oh sorry ! good luck with your search :)

@sanjikaneki6226 Ай бұрын

regarding that cut out if i dont have enough space should i do it under the tht parts or the smd parts ( i have a few isolators and a SIP7 smps that is isolated, what do you think?

@sgctactics Ай бұрын

The cutouts on these types of circuits is good standard practice mainly for visual indication of where an isolation is occurring, so technically not critically necessary. The dielectric of the fr4 is, in most cases, sufficient enough by itself. Just leave enough space on the traces to galvanically separate both sides of your circuit without capacitive coupling and you'll be fine

@sanjikaneki6226 Ай бұрын

@@sgctactics thx, i left 5mm solder mask/fr4 empty space i think this is enough then

@hanipahmuda3492 Ай бұрын

What name of the CAD software you are using?

@IMSAIGuy Ай бұрын

KiCad

@paulperano9236 Ай бұрын

I found if the boards are very small you may get 15 for the magic $5. I sometime use tiny boards for the WH148 potentiometers. Solder the board to the pins and then the wires to holes in the board. About 15-20mm square.