Questions tagged [schematics]
The diagram that shows how the parts are hooked up logically. If your question is about a specific schematic software package, use that tag instead.
2,000 questions
0 votes
1 answer
110 views
DC motor control problem
I'm designing a PCB for motor control. But my Proteus is not working and it doesn't show these errors that I don't understand (view last photo).
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-2 votes
1 answer
87 views
Simple ways to detect human motion behind me [closed]
Let's suppose that I want to help my son cheat (a little) at the game of tag. In this version of tag, someone can sneak up quietly behind their opponent, tap them and run away. What are some ways I ...
- 105
1 vote
1 answer
80 views
Tactile vs Latching switch schematics
On this image one switch should be tactile, another latching, which is which? I did some research, I asked AI and it told me that KEY2 is latching, but I found this answer suspicious and confusing. ...
- 173
0 votes
1 answer
60 views
Car strobe unit PCB with 8 LEDs schematic check
I’m working on a circuit board for amber strobe units to be used in a car. Each board will feature eight individually addressable LEDs, controlled by an ATtiny microcontroller. In certain ...
1 vote
2 answers
138 views
How are the circled blocks connected on this Geiger-Muller counter?
How are the hanging blocks of this device connected, and what function do they perform?
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1 vote
3 answers
145 views
What is the designation near the u11 chip (marked in gray)
This diagram is from The Wearable Electronic Customizable Device for Monitoring Activity Indicators. Volume 6, Issue 5 . The system consists of a number of discrete off the shelf modules, which ...
0 votes
0 answers
40 views
Altium Designer 24x how to use bus port in sheet symbol to correctly connect in parent schematic
On one page I have: Parent schematic: First block is connecting OK Second does not connect correctly: What am I doing wrong? Sorry if the question is naive - I am doing it infrequently (electronics ...
- 2,712
3 votes
1 answer
76 views
A6217 with 700 mA LED schematic check
I’m working on a circuit board for an amber strobe unit. It will feature eight individually addressable LEDs controlled by an ATtiny microcontroller. Each 700 mA LED will be driven by an A6217 driver ...
0 votes
1 answer
76 views
STM32L552RET6 she [closed]
This microcontroller has many options for each pin (GPIO, UART, SPI, I2C, etc.) , and I don’t know how to choose between them. Can you explain how pin selection is done in a hardware design and send ...
- 19
0 votes
1 answer
79 views
Schematic review of solar charger with BMS
Please review my schematic for solar charger with BMS.
- 17
0 votes
1 answer
104 views
PWM demodulator implementation
I was browsing the web for the prior works on the PWM demodulator implementations, and I found patent US4408166A, "Pulse width modulation decoder" from 1982. I cound not obtain the vo ...
1 vote
0 answers
71 views
Altium designer bus duplicate net names in hierarchical schematic
I have a Design with several subsheets. I'm having issues connecting i2c buses. Two sheets contain buses named IIC_SDA[1..25] and IIC_SCL[1..25]. When both of these sheets are placed inside the top ...
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1 vote
1 answer
76 views
Are theses inductor or capacitors for maal011078?
This one is just a demo design for 4.4-4.9 GHz provided by the MAAL011078-datasheet. Is L3 inductor or capacitor? Is C5 an inductor or a capacitor? This name of symbol doesn't match the part list. (...
- 1,127
0 votes
1 answer
127 views
How to modify resistor value to achieve -10°C offset in Perry TITE301/MC thermostat circuit?
I’m modifying a Perry TITE301/MC thermostat to change the temperature offset applied when the remote control is activated. By default, activating the remote (closing contacts 6 and 7) lowers the ...
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3 votes
2 answers
294 views
What is a good way to arrange hidden (NC) and visible pins on a symbol?
A symbol should look and function in such a way it optimises the way a schematic is read. I want to change the symbol below in such a way. This symbol has a lot of pins that I don't want connected, ...
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