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by Brandon92
Fri Oct 30, 2020 7:09 pm
Forum: Automation, sensing and robotics
Topic: Attaching a TSIC 306 sensor produces a 'short' or shuts off the Pi
Replies: 11
Views: 411

Re: Attaching a TSIC 306 sensor produces a 'short' or shuts off the Pi

drgeoff wrote:
Fri Oct 30, 2020 6:47 pm
Incorrect. Although there are other models that have analogue output the TSIC306 (and other x06 ICs covered by https://www.ist-ag.com/sites/default/files/attsic_e.pdf) is digital output (ZacWire) only.
Your are correct, my mistake. Did read the datasheet a bit to fast.
by Brandon92
Fri Oct 30, 2020 3:59 pm
Forum: Automation, sensing and robotics
Topic: Attaching a TSIC 306 sensor produces a 'short' or shuts off the Pi
Replies: 11
Views: 411

Re: Attaching a TSIC 306 sensor produces a 'short' or shuts off the Pi

phario wrote:
Wed Oct 21, 2020 8:08 pm
This is strange. I bought a [TSIC 306 sensor](http://www.farnell.com/datasheets/1792637.pdf).
What is the exact type that you ordered. Because that ic has a couple of option on what the output signal is: digital or analog.
by Brandon92
Thu Oct 29, 2020 7:14 pm
Forum: Automation, sensing and robotics
Topic: About sensors
Replies: 3
Views: 92

Re: About sensors

Suggest me good position sensors or Vision sensors? With the brand are better? Are you paying us to answer this question. So what do you want the sensor to do. Your question is the same as: "What brand car is better for me" without any more detail/ specifications... In short, what for research did ...
by Brandon92
Thu Oct 29, 2020 5:21 pm
Forum: Automation, sensing and robotics
Topic: Photodiode to measure light intensity
Replies: 7
Views: 187

Re: Photodiode to measure light intensity

You could use a opamp to convert the diode current to a voltage. Analog devices has a interesting post about this with some theorie: https://www.analog.com/en/technical-art ... esign.html
by Brandon92
Fri Oct 23, 2020 9:12 am
Forum: Troubleshooting
Topic: no problem with USB. But soldering has a problem. plz help...
Replies: 5
Views: 190

Re: no problem with USB. But soldering has a problem. plz help...

toy339 wrote:
Fri Oct 23, 2020 8:22 am
Yes, the white is properly soldering.

If connection was normal, Is it recognized as usb without an internal setting?
It looks like if you soldered those 2 pads together:
RpiUsbShort.png
RpiUsbShort.png (91.91 KiB) Viewed 134 times
If it is a normal USB device it should work lik this.
by Brandon92
Fri Oct 23, 2020 5:54 am
Forum: Troubleshooting
Topic: no problem with USB. But soldering has a problem. plz help...
Replies: 5
Views: 190

Re: no problem with USB. But soldering has a problem. plz help...

Is the white cable only soldered to that round pad or also to the mounting hole next to it. Because it looks like it is also soldered to it and this will give you a problem that the USB will not work.
by Brandon92
Thu Oct 22, 2020 3:16 pm
Forum: Automation, sensing and robotics
Topic: Stepper Motor
Replies: 5
Views: 192

Re: Stepper Motor

ah ok I didn't realize hat it was 2x 1.7A. I will try and connect without using the dupont cables and breadboard then. Strangely it seemed to work a bit quicker and smoother with an Arduino (breadboard and dupont wires etc) I am using the EasyDriver Stepper Motor Controller - https://www.robotshop....
by Brandon92
Thu Oct 22, 2020 7:12 am
Forum: Automation, sensing and robotics
Topic: Connecting the high voltage and current sensors to raspberry
Replies: 1
Views: 105

Re: Connecting the high voltage and current sensors to raspberry

First of all, I assume that the output of that sensor is "save to touch". So it is galvanic isolated from the high voltage side. As you stated the output of that sensor need to connect via a ADC to the Rpi. The Rpi can only read digital signals by the way. If the output of the sensor is a ac voltage...
by Brandon92
Thu Oct 15, 2020 6:58 pm
Forum: Beginners
Topic: Motor Controllers
Replies: 4
Views: 154

Re: Motor Controllers

Bigvirg97 wrote:
Thu Oct 15, 2020 6:43 pm
How many motor controllers and be hooked up to the raspberry pi?
You can connect as much as you want to the Rpi. But it al depends on how you want to control it. Note, you can not connect a motor without a driver to the Rpi!
by Brandon92
Thu Oct 15, 2020 5:52 pm
Forum: Beginners
Topic: Driving a series of high power led
Replies: 13
Views: 320

Re: Driving a series of high power led

Hi! Any updates on the proj? We have a similar goal but idk how to drive 10 high power leds in series and controlling them using GPIO pins. Would i just add more leds in series with the R1 on the diagram that mahjongg constructed? Yes, but also a little bit no. It depends on what voltage your high ...
by Brandon92
Thu Oct 15, 2020 4:11 pm
Forum: General discussion
Topic: Connecting 12V LED to Raspberry Pi GPIO (3.3V)
Replies: 23
Views: 930

Re: Connecting 12V LED to Raspberry Pi GPIO (3.3V)

Hi! Any updates on the proj? We have a similar goal but idk how to drive 10 high power leds in series and controlling them using GPIO pins. Would i just add more leds in series with the R1 on the diagram that mahjongg constructed? Yes, but also a little bit no. It depends on what voltage your high ...
by Brandon92
Wed Oct 14, 2020 3:20 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: (Solved) PCA9685 Servo Disconnect
Replies: 23
Views: 722

Re: PCA9685 Servo Disconnect

Good to hear that your problem is solved.
by Brandon92
Sat Oct 10, 2020 7:01 pm
Forum: Advanced users
Topic: Raspberry - Multiplexer Connection
Replies: 22
Views: 724

Re: Raspberry - Multiplexer Connection

I tried this but result is negative. I connected 4 Rapi pins to this multiplexer, changed their status but no signal from any of multiplexer's pin. How will I connect this multiplexer and run it? Can you show us more in detail how you connected everything together and a picture could also be helpfu...
by Brandon92
Sat Oct 10, 2020 6:03 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: (Solved) PCA9685 Servo Disconnect
Replies: 23
Views: 722

Re: PCA9685 Servo Disconnect

gotiobg wrote:
Sat Oct 10, 2020 5:40 pm
PCA9685 should be able to handle even 8 amps.
No it doesn't. The output of the PCA9685 can only drive 25 mA.
by Brandon92
Sat Oct 10, 2020 4:24 pm
Forum: Automation, sensing and robotics
Topic: Multiple BME680s over long distances
Replies: 9
Views: 443

Re: Multiple BME680s over long distances

The big problem with i2c is that any transition on the data & clock lines has a specific meaning, so it is really important that there are no glitches on the lines, otherwise the interface will lock up at random times - you'll see plenty of posts on this forum along the lines of "help, my i2c link ...
by Brandon92
Sat Oct 10, 2020 3:26 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: (Solved) PCA9685 Servo Disconnect
Replies: 23
Views: 722

Re: PCA9685 Servo Disconnect

The PCA9685 does not have a MOSFET. It sounds like you are using a module based on the PCA9685. I really doubt if you can push enough amps through such a module to feed your servos properly. Please clarify what you are using. I'm using PCA9685 but maybe the burnt part is not a MOSFET. pca9685_burnt...
by Brandon92
Fri Oct 09, 2020 8:01 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: (Solved) PCA9685 Servo Disconnect
Replies: 23
Views: 722

Re: PCA9685 Servo Disconnect

This makes sense. I'm using paper clips to connect the batteries between themselves and to the buck converter. They are not the thickest "wire" to use but should be enough. However, I'm using very thin jumper wires to connect the buck converter to the PCA9685 , which might be an issue. The buck con...
by Brandon92
Fri Oct 09, 2020 7:07 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: (Solved) PCA9685 Servo Disconnect
Replies: 23
Views: 722

Re: PCA9685 Servo Disconnect

What is the specifications of the buck converter that you are using? It's a Chinese SZBK07 which has an input of 6-40V DC and outputs 1.2-36V DC, 0-15A. It can be possible that the power supply is not able to deliver the pulse current that your servos are asking and you might solve this by adding s...
by Brandon92
Fri Oct 09, 2020 6:57 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: (Solved) PCA9685 Servo Disconnect
Replies: 23
Views: 722

Re: PCA9685 Servo Disconnect

What is the specifications of the buck converter that you are using? It's a Chinese SZBK07 which has an input of 6-40V DC and outputs 1.2-36V DC, 0-15A. It can be possible that the power supply is not able to deliver the pulse current that your servos are asking and you might solve this by adding s...
by Brandon92
Fri Oct 09, 2020 7:52 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: (Solved) PCA9685 Servo Disconnect
Replies: 23
Views: 722

Re: PCA9685 Servo Disconnect

... The output is 8.4V. Both PCA9685 and RPI4 receive the power from the same source and both use a step-down buck converter each, which provides 5V to RPI4 and 6V to PCA9685. ... I think the issue lies in not enough amps being provided to the servos when using batteries. What is the specifications...
by Brandon92
Thu Oct 08, 2020 8:59 pm
Forum: Automation, sensing and robotics
Topic: IR temperature sensor
Replies: 1
Views: 171

Re: IR temperature sensor

Something like this: https://www.thermo-electra.com/en/produ ... rmocouples (first hit on Google).

By the way, what did you want to measure that is so hot.
by Brandon92
Thu Oct 08, 2020 7:54 pm
Forum: Automation, sensing and robotics
Topic: Multiple BME680s over long distances
Replies: 9
Views: 443

Re: Multiple BME680s over long distances

daviestar wrote:
Thu Oct 08, 2020 11:04 am
I also read about using differential driver/receivers (AM26LS32 and AM26LS31) which can allow 50m cable length.
If you want to use a cable, then you indeed need a differential driver and receiver. This PDF is interesting to read. And might give you a idea on what is possible.
by Brandon92
Tue Oct 06, 2020 2:59 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Irregular MCP3008 data
Replies: 47
Views: 1476

Re: Irregular MCP3008 data

Thanks for the contribution but it is something that we have already tried. I have also changed the breadboard and it still does not show anything. I bought the ads1115 chip that pcmanbob recommended to me. In a month I will get home and I will tell you if it works for me. Okay that is a shame that...
by Brandon92
Mon Oct 05, 2020 7:57 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Monitoring mains (AC) voltage with the Pi
Replies: 77
Views: 41242

Re: Monitoring mains (AC) voltage with the Pi

To add to my comment. Why there is not a voltage hat or sensor is byond me. Alibaba should be selling them. If I can have a pocket size multimeter you would think they can make a simple sensor. Alibaba does have a low voltage meter so I wonder the accracy if I get a stepdown then use one of those t...

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