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I need to detect room luminosity. I was thinking to use normal LED and op amp to bring the signal to PIC adc.
Will the selected op amp in the below circuit be OK?
I don't wish to use bjts since they consumes current and don't know what kind of effect will that have on the ECU. Also I intend to use PIC features that is INT external schmitt triggered input, so do I need an external comparator? Blease advise on the circuit provided.
I need to draw a circuit diagram how to connect pickup coil (2 wire tacho generator) to a 8 bit PIC microcontroler in order to read the signal.
I found some schematics on the internet (attachment 1), that I don't see being correctly done. I don't understand why there is a rectifier diode and 10k...
I am making a bike gear indicator circuit that would based on a 3 wire hall effect speed sensor and a 2 wire magnetic coil RPM sensor readings and I had allready opened a topic "PIC multiple interrupts" where user "Tahmid" was wery helpful explaining things.
At the beggining I didn't really...
yes code is completly understandable, it won't be problem for me to transform into mpascal, since the logics is the same.
Also I read that better response is achived if you calculate speed based on measuring the time between two signal changes, rader than counting signal changes in a specific...
Helps a lot, you are great. Thought that I was unintelligible since shahbaz.ele did not understand me.
If it is possible I'll preffer to use 16F since my PCB is allready made for DIP14 PIC MCU (for solder through hole ,18F family only comes with minimum of DIP18 and I am a bit low on housing...
I would like to read digital signal from hall efect speed sensor and I was thinking of making two interrup routines. In first I'll be generating Timer0 interrupt that will increase counter on timer overflow.
Second interrupt will occur on sensor signal change connected to PIC input and will...
Hi,
do I need to use op amp to do this? Can someone make me the wiring diagram, with the proper resistor value and op amp label (4 channel if possible since I will have four of this sensors)?
Maybe below schematic will help (google search).
I will aslo need the temp equation (I found this...
Can you help me found this on Farnell, since search bar doesn't found photoimageable solder masks, and live cheat help desk is only for registrated customers (retailers). Can NaOH also be used as developer here?
pranam77 I want my PCB looks like industrial, so I wish it to be in green or red...
Hi,
I need a coating mask (I think) so I could paint and protect my PCB after etching process, but before I solder components to the board. Since my local electronics supplier doesn't have much chemicals I found some on Farnell but don't know if I need some developer with it (like NaOH), or will...
Hi, I have a hot water boiler that comes with some electronic control unit, but this unit does not have switching for electric heater inside a boiler. So I am building my own control unit, where I would like to use temperature probes that are allready installed (4). The problem is that I don't...
Is it possible to make RTC using PIC MCU with internal or external oscilator?
I have written a code for clock using timer TM0 and external 20MHz osiclator, but the clock is very inaccurate (-10 minutes per day).
So is it only way that I add external RTC IC like (PCF8583 or DS1307)?
FET on PIC output
I found this diagram
on this site and whis to know if you don't need a reverse biased diode like you need when using a BJT to eliminate spikes at startup and shutdown operation.
PS author mention that FETs normaly need voltages higher than 10V at the gait to conduct through...
I want to set rbpu bit to be 0 so I will enable portb internal pull ups in PIC mcu.
I am using mikropascal compiler and when I write "OPTION_REG:=value;" the command is excepted, but if I want to set particular bit as "OPTION_REG.RBPU:=0" the command isn't accepted.
For comparison the compiler...
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