electroSome » All Posts https://electrosome.com/forum/project-discussions/feed/ Sat, 18 Mar 2023 04:13:04 +0000 https://bbpress.org/?v=2.6.9 en-US https://electrosome.com/topic/1khz-signal-generator-ideas/#post-14985 <![CDATA[1kHz Signal generator ideas]]> https://electrosome.com/topic/1khz-signal-generator-ideas/#post-14985 Thu, 21 Jun 2018 15:33:09 +0000 triangles I am looking for ideas to come up with something cheap to generate a 12V 1000Hz 20% duty cycle signal.  I have tried with a 555 timer but I would have to use potentiometers which I would like to avoid.  The trial circuit I built was only 918Hz with 22% duty cycle.  I’d like to be within +- 10 Hz but I should be ok with +- 2o Hz.  Ideally I’m trying to come up with something that I don’t need to fine tune with a scope and is cheap.

]]> https://electrosome.com/topic/conversation-problems/#post-13896 <![CDATA[conversation problems]]> https://electrosome.com/topic/conversation-problems/#post-13896 Sat, 29 Jul 2017 14:47:44 +0000 Adepoju Jamiu Adegboyega Good afternoon geeks, I’m working on a project that mmeasure the resistivity of earth.  I used the circuit voltmeter ammeter circuit posted by Ligo couple of years ago. I’m having problem with float to string conversion. The results are not accurate in term of decimal places. For example I used

char res[7] ;

float Resistance;

resistance=volt/(current/1000);

floattostr(resistance, res)

But instead of getting the decimal places the way they suppose to appear is the problem.  Such as 191.876 instead of 19.1876. Help me please

]]> https://electrosome.com/topic/led-message-display-screen/#post-13752 <![CDATA[led message display screen]]> https://electrosome.com/topic/led-message-display-screen/#post-13752 Wed, 03 May 2017 12:41:53 +0000 pedas please help me with a tip on how to interface a matrix led screen with at89c52 micro controller to display message from a pc system

]]> https://electrosome.com/topic/data-transmission-using-li-fi/#post-13516 <![CDATA[Reply To: Data transmission using Li-Fi]]> https://electrosome.com/topic/data-transmission-using-li-fi/#post-13516 Sun, 05 Mar 2017 05:53:22 +0000 Ligo George Following are my suggestions.

  1. You can transmit data using similar technology that our IR remotes do.
  2. You can use an IR LED working under high frequency and you can use a TSOP sensor to decode it. For eg. 38KHz and TSOP1738
  3. For two way transmission you may set one device as master and another one as slave. Slave will transmit data only if it get a command from master. This will ensure that only one device will transmit at a time.
  4. You may also use two different frequencies. For eg. 30KHz, TSOP4830 and 56KHz, TSOP4856. In this case two devices can transmit data at the same time.
]]> https://electrosome.com/topic/data-transmission-using-li-fi/#post-13493 <![CDATA[Data transmission using Li-Fi]]> https://electrosome.com/topic/data-transmission-using-li-fi/#post-13493 Fri, 24 Feb 2017 23:26:25 +0000 TOMCRUZE Hi,

I am doing project “Data Transmission using Li-Fi’. I need to transfer measured analog data using ADC and then converting into serial data format. I will be using LED to transmit data and I need to transmit the same in reverse also. I don’t know how to do it, please help me.

]]> https://electrosome.com/topic/intelligent-ambulance-with-automatic-traffic-control/#post-12671 <![CDATA[Reply To: Intelligent ambulance with automatic traffic control]]> https://electrosome.com/topic/intelligent-ambulance-with-automatic-traffic-control/#post-12671 Sun, 10 Jul 2016 05:21:11 +0000 Ligo George If you are directly connecting it to UART of the microcontroller, it is better to keep low baudrate.

]]> https://electrosome.com/topic/intelligent-ambulance-with-automatic-traffic-control/#post-12662 <![CDATA[Reply To: Intelligent ambulance with automatic traffic control]]> https://electrosome.com/topic/intelligent-ambulance-with-automatic-traffic-control/#post-12662 Tue, 05 Jul 2016 12:15:06 +0000 ebenmoore both options are the best. if you are connecting the remote directly to pic, then plug through the Tx and Rx of the PIC.

And if you are using the Encoder(HT12E), Connect the Data Pin of the encoder to the PIC and make sure that at the PIC, the data lines are Inputs to the PIC. so, you then configure your channels.

 

]]> https://electrosome.com/topic/intelligent-ambulance-with-automatic-traffic-control/#post-12653 <![CDATA[Intelligent ambulance with automatic traffic control]]> https://electrosome.com/topic/intelligent-ambulance-with-automatic-traffic-control/#post-12653 Tue, 28 Jun 2016 14:06:17 +0000 vidya Following is the link that is related to this project-http://www.engineersgarage.com/contribution/intelligent-ambulance-automatic-traffic-control

I have a problem regarding the remote which has to be connected in the ambulance unit which tells about the lane the ambulance is travelling.Please do help where does the remote has to be  connected to the PIC microcontroller or it can be done by connecting it to HT12E?

]]> https://electrosome.com/topic/usb-pic-programmer-pickit2/#post-12170 <![CDATA[Reply To: USB PIC Programmer PICKit2 – FET replacement PCB]]> https://electrosome.com/topic/usb-pic-programmer-pickit2/#post-12170 Thu, 11 Feb 2016 02:44:32 +0000 Ligo George There is no track/pad provided in the pcb for that resistor. That pcb is designed for mosfet. You need to adjust it in the circuit.

 

Please post these doubts in the comments section just below the article.

]]> https://electrosome.com/topic/usb-pic-programmer-pickit2/#post-12143 <![CDATA[USB PIC Programmer PICKit2 – FET replacement PCB]]> https://electrosome.com/topic/usb-pic-programmer-pickit2/#post-12143 Tue, 09 Feb 2016 14:57:20 +0000 Asoke Kumar I have etched the PCB as per the diagram provided successfully and have started soldering the resistors. While doing this, I realised that there is no track
provided for the base resistor 1k of BC557 (I am using in place of BS250). Do I cut the track at the base of BC557 and solder the 1k resistor between BC557 base
and the junction of R5 and Q4 or replace R5 with 1k resistor ? Please excuse for my confusion as this is my first exposure to FET circuits.

]]>