Activity for DeadMouse
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
1-wire interface overvoltage protection I'm designing a robust 1-wire output for an IoT board. The interface should be able to withstand high voltage. Mainly the same voltage level as the board power supply. That's 12V to 36V DC. The protection is intended for the board only, not the devices connected to it. Consider the protect... (more) |
— | about 2 months ago |
| Question | — |
Ground pour on outer layers on 4-layer PCB I'm designing a board that contains a cortex-M4 mcu working at 120MHz, and an ethernet bus with a wiznet chip that communicates with SPI. The ethernet chip gives me a phy output that goes directly to a connector with internal magnetics. All circuits are powered by a DC to DC buck converter.... (more) |
— | 10 months ago |
| Question | — |
Sensing 3 states in a single mcu pin using firmware I want to sense 3 different states in the same mcu pin (GND, Hi-Z and PWR). PWR is typical +24V but I would like to have a wide margin from +17V to +40V just to be safe. The values can change but the typical will still be +24V I need 32 different (physical) inputs. I designed the following c... (more) |
— | 11 months ago |
| Question | — |
How to change the polarity of an input using a single switch? I have an mcu pin and I want to sense a voltage up to 24V to 36V. I want to connect some outputs on the board I'm designing and I don't know whether those outputs will provide a voltage or will be open collector outputs. Also, some outputs will be just relays and the other terminal will be at G... (more) |
— | 11 months ago |
| Question | — |
Energy harvesting from non-invasive current sense transformer I have a non-invasive current sense transformer (SCT-013-030) which according to its datasheet it is voltage output type. I want to harvest energy and supply a wireless sensor that consumes 5-6 uA current average. The most common approach is a rectifier on the output of the transformer. But I'm... (more) |
— | over 1 year ago |
| Question | — |
Ceramic filter vs ceramic resonator I have a design of a power line communication using the following IC. https://www.yamar.com/datasheet/DS-SIG60.pdf My design is the same as the example circuit in the datasheet of the chip. Schematic The schematic above uses integrated ceramic filters. There are also some suggested part n... (more) |
— | over 1 year ago |
| Question | — |
DAC controlled high side current source. I'm designing a high side current source that can be controlled with a Digital-to-analog and can source up to 100mA with voltage supply up to 36V. By high side I mean one side of load will be always grounded. Below you can see a reference design of a such circuit. Image alt text In the de... (more) |
— | about 2 years ago |