I am trying to measure a voltage between 2.90V and 4.12V (from a RTD via a differential amplifier[MCP602]), and display this as a number between 0 and 1023.
My circuit has this voltage on AN0, and...
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I am trying to measure a voltage between 2.90V and 4.12V (from a RTD via a differential amplifier[MCP602]), and display this as a number between 0 and 1023.
My circuit has this voltage on AN0, and...
Wish to measure three small voltages (<1V) on a 16f676. Set Vref to 1.023V, but found the reading fluctutes with an injected voltage of 100mV on AN1. Checked AN1 ok with internal vref. This raises...
This is true presario, and is perfectly adequate for my needs - the circuit needs to trigger an alarm when the ambient temperature falls below zero, and another alarm if the temperature reaches -7...
Thanks for the input.
Unfortunatly I'm using a DS18S20, and not DS18B20, so don't think the DIV32 route will work.
Also, I only used 1's compliment as the LSB is truncated. Basically I wondered...
I need to extend the range of the DS18S20 below zero, to one decimal place. My current program uses the "onewire.bas" routine to calculate this:
' Calculate temperature in degrees C to 2 decimal...
I built one a couple of years ago to fit Estes BT-50 (or similar) body tubes. I used a freescale MPX2100 pressure sensor
http://www.freescale.com/files/sensors/doc/data_sheet/MPX2100.pdf?pspll=1...
I have a display project that uses a 16F73, and I need to add a GPS reciever and status LED. However the only availible ports are RB7, RA1 and RA3. Unfortunatly RA0 is used as an analogue input while...
In the end I used the TMR0 timer and wrote the program in assembly (my first attempt at assembly on a PIC!). Using a 32K768Hz crystal, I set the prescalers to 1/256 to give 32Hz, and then counted to...
I need to build a circuit that accurately toggles two outputs (1 high, 1 low) every minute. My initial idea was to use the 1Hz output from a DS1307 RTC, and counting to 60.
However, I thought a...
Thanks. Will just have to had a crystal to the parts list!
Have used hitachi standard VFD in many PIC products without problems.
I get mine from Farnell.
I wish to add a frequency counter to a square wave generator (20Hz to 3kHz, TTL) using the COUNT instruction, and to keep it really simple was going to use a 16F628, 8x1 LCD and 100nF decoupling...
I wish to use an accelerometer to measure the angle of a rocket launcher (model, that is!) and display the result as degrees (sort of digital spirit level). I am using a +/- 1G accelerometer that...
Thanks arniepj. Will give it a try and let you now how I get on
If only it were that simple Steve. Have tried sending the 10 bit data and still the same results. The data sheet does say that if 16 bits are sent, the first 6 bits are ignore, but thanks for the...
Am trying to interface a 16F84 to the AD7391 DAC, but with limited success. I have wired the DAC for unipolar output mode, with a 2.5V reference voltage and I am getting irratic output voltage. Can...
There is a pre-programmed PIC called PAK-VI available from milford instuments. I beleive they cost around £25. I've used them in the past and seems to work fine.
Am building a controller that uses a PS/2 keyboard to input data (the one I using at the moment is a Fujitsu E105). For ease of programming I wish to the above coprocessor.
Have built the circuit...
Trying to link a KMC-10 magnetic current sensor to a 16F73 ADC input, but also need a 0 to 10 volt aux output.
Because the sensor is a bridge (output in mV) am using a classic differential...
Not really a PBP question. But I have a ex-BR station clock (Big red, cluncky thing!), that seems to work ok. Except it requires a serial I/P (time data) to run. Does anyone know the data/protocols...
I am trying to get a 16F84 to communicate with a EM2 MSF receiver module via MCM-RS232 Decoder module, which I got from Maplins (part nos MK68 & MK73), but with out sucess.
My basic code is as...
Thanks Mat
Can anyone tell me if the 16C505 is compatable with PBP?
If so, can I use internal clock?
Thanks again!
Am building a circuit that requires two isolated analogue inputs to be recorded, was going to use two CA3162 (A/D to BCD), and opto isolate the 7 outputs to a 16F73.
However, have come across the...