TelepathicWalrus

Hi,

I am thinking about the best way to transmit 5 single ended signals from one board to another as well as ground and 2 power rails. I was thinking cat5e cable with a standard rj45 plug but as cat5e is twisted pair I'm concerned about crosstalk.

The cable between the two boards would be a maximum of 50cm. 3 of the signals are addresses for a multiplexer that would change at a maximum speed of 2ms per change. One of the other signals is a 20khz pwm signal. The final signal is a zc detector for mains so max Freq of 100/120hz.

There may be high current switches at ac line frequency (50/60hz) near by.

Would single ended transmission with cat5e cable be okay for this or would I need differential signalling? If I need differential signalling, what sort of cable/connector could I use?

Any help is appreciated

Thanks

Hey!

I have made a 24v supercapacitor bank which is made of 12 2.7v 20F supercapacitors, balancing resistors, charge resistor and a diode to bypass the charge resistor when in discharge mode.

The mistake was made when it was connected to a mean well LRS-100-24 which is a 24v 100W supply. When I powered it up the other control board was starting and stopping - the power supply was current limiting. Im not sure what voltage would have been applied to the supercapacitors but I think it wasn't high as the microprocessor on the other board was constantly resetting so the supercaps were not charged.

This happened for a maximum of 60s until I realised what was wrong and disconnected the caps.

My question is - will the capacitors be damaged from this event? Any help is very much appreciated.

Thanks

Hello,

I am looking for a good way to mount a daughter board to a motherboard that can be ~~hot~~ swappable. I would like it to be able to mount securely preferably with mechanical clips or fixings.

There will be up to 10A to go through it for power as well as around 10 signal pins. Obviously I can use several pins to get the required current rating.

I have seen DIN 41612 connectors but I am concerned about the daughter board coming loose.

If anyone can help me it would be much appreciated 😊

Hi there,

I'm considering upgrading my old ender 3 and it looks like the prusa MK4 or bambu labs p1s are the current best options out there.

I like the bambu labs for the fast print speed and x/y print bed. I also love the idea of the AMS - it would be awesome to print in colour! But being closed source puts me off a bit as I currently use octopeint and obico to monitor my ender 3 which, as far as I can tell, Is not possible to use with bambu labs. Also having to upload gcode to the cloud is not ideal.

The prusa however is great because of the open source nature. However the slinger bed and slower prints are putting me off. I have also read that the mmu can be temperamental at best, so printing colour may not be an option?

Any thoughts/recommendations?

Thanks

Hi there,

I wish to run a wireguard docker through a glueton docker so that i can access my paid vpn from my own server. This is what i want:

client -> wireguard docker(selfhosted) -> gluetun docker(connected to paid VPN) -> internet

I have posted before with this issue but still cannot get it to work as expected. I am not sure if there is issues with the wireguard docker not being able to route back through from gluetun as it is trying to force traffic through the tunnel.

Any help would be much appreciated.

docker-compose.yml:

services:
  gluetun_test:
    image: qmcgaw/gluetun
    container_name: gluetun_test
    cap_add:
      - NET_ADMIN
    ports:
      - "5010:5000"
      - "5011:8000"
     # Port of the WireGuard VPN server
      - "36843:36843/udp"
    environment:
      - VPN_SERVICE_PROVIDER=custom
      - VPN_TYPE=wireguard
      - WIREGUARD_PUBLIC_KEY=
      - WIREGUARD_PRIVATE_KEY=
      - VPN_ENDPOINT_IP=ip
      - VPN_ENDPOINT_PORT=port
      - WIREGUARD_ADDRESSES="10.2.0.2/32"

  wireguard:
    image: linuxserver/wireguard:latest
    container_name: wireguard
    cap_add:
      - NET_ADMIN
    environment:
      - PUID=1000
      - PGID=1000
    volumes:
      - ./wireguard/config:/config
#    ports:
      # Port for WireGuard-UI
#      - "5010:5000"
      # Port of the WireGuard VPN server
#      - "36843:36843/udp"
    network_mode: service:gluetun_test
    sysctls:
      - net.ipv4.conf.all.src_valid_mark=1

wg0.conf

# Address updated at:     2023-07-08 18:51:31.120262753 +0000 UTC
# Private Key updated at: 2023-05-09 18:59:02.233090133 +0000 UTC
[Interface]
Address = 10.252.1.0/24
ListenPort = 36843
PrivateKey = 
MTU = 1450
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
Table =

[Peer]
PublicKey = 
PresharedKey = 
AllowedIPs = 10.252.1.1/24