3V causes problem

Started by upand_at_them in Piclist13 years ago 3 replies

I have a 16F628 running at 5V, but when I switch it to 3V it doesn't work. It uses the UART and the MAX232 is supplied 5V. When...

I have a 16F628 running at 5V, but when I switch it to 3V it doesn't work. It uses the UART and the MAX232 is supplied 5V. When I change the PIC back to 5V it won't work again and I have to reprogram the chip. I have LVP disabled. I have, however, verified that I can


External Oscillator

Started by Anonymous in Piclist14 years ago 2 replies

Hey, On my 16F628, how do I set up an external oscilator? I tried setting it to the XT setting but then nothing works at all. Any...

Hey, On my 16F628, how do I set up an external oscilator? I tried setting it to the XT setting but then nothing works at all. Any help please? -Shamoon


Serial I/O on the 16F628

Started by jrem in Piclist13 years ago 17 replies

Guys/Gals: I can't seem to get the tx i/o to flip. I could spend endless hours screwing with the hardware (since MPLab...

Guys/Gals: I can't seem to get the tx i/o to flip. I could spend endless hours screwing with the hardware (since MPLab doesn't support serial functions) or I could ask the infinite intellegence (i.e., you the group) for direction. I choose the latter. He


programming the 16F877A

Started by nford85 in Piclist14 years ago 2 replies

Hi I am new to PICs, so my problem is probably the result of my inexperience with them. I have built a WISP628 programmer and ...

Hi I am new to PICs, so my problem is probably the result of my inexperience with them. I have built a WISP628 programmer and managed to get it working with a bunch of PICs(16F84A, 16F628, 18F252, 18F452). However, when I try to program an 877A with the WISP, XWisp g


Thanks for the CONFIG help

Started by upand_at_them in Piclist14 years ago 3 replies

I got the 16F628 programmed, wired up the circuit, connected it to my little Yaesu VX-2R, launched HyperTerminal, and voila! I...

I got the 16F628 programmed, wired up the circuit, connected it to my little Yaesu VX-2R, launched HyperTerminal, and voila! I was tickled pink just to see this in the term window: PIC 16F62x Packet Decoder * N0QBH (c) 2003 And then... N3SDO-9>APRS,WIDE


New to PIC

Started by Shamoon in Piclist14 years ago 4 replies

Hello everyone, I have the 16F628, and the JDM Programmer (Serial). Can someone please give me a run down of how to use ICPROG to...

Hello everyone, I have the 16F628, and the JDM Programmer (Serial). Can someone please give me a run down of how to use ICPROG to program the PIC? I keep getting a "Verify failed at addres..." error. I searched online for everything that I could and still no luck. Any he


PIC Erasing Problem

Started by Shamoon in Piclist14 years ago 4 replies

Hey, I have the 16F628 and when I try to erase it, it doesn't fully erase. In the beginning, some data is still left and the rest...

Hey, I have the 16F628 and when I try to erase it, it doesn't fully erase. In the beginning, some data is still left and the rest turns to 3FFF. I'm using the EPIC programmer and the EPIC software.. Any help? Shamoon


Eeprom in 16F648A

Started by wantoniet in Piclist14 years ago 5 replies

Hi, I was working at my last project and found a problem so very interesting. My equipament used a 16f628 and i upgraded to...

Hi, I was working at my last project and found a problem so very interesting. My equipament used a 16f628 and i upgraded to 16f648a cause i required more flash memory. On step to write in internal eeprom, i realized that sometimes wrote right, sometimes not. After tw


16f628 and the usart

Started by jmonegal in Piclist15 years ago 1 reply

Hi gang. My name is Jeff Monegal and this is my first message. Can anyone supply a routine that allows two '628s' to talk to...

Hi gang. My name is Jeff Monegal and this is my first message. Can anyone supply a routine that allows two '628s' to talk to each other using the USART. Perhaps a word placed in the W register is then sent and the other end returns from a routine with this word in its W


Aussie PIC programmers

Started by sinclan_ratatattat in Piclist14 years ago 4 replies

Gday, Im sure you get a lot of these questions so pls forgive me. Im a n00b so gimme a break :o ] Im looking for a...

Gday, Im sure you get a lot of these questions so pls forgive me. Im a n00b so gimme a break :o ] Im looking for a programmer to handle PIC micro chips from 16f628 and up. Most of what Ive managed to track down in australia seems dodgy or very VERY expens


USB PIC Programmer

Started by Steven in Piclist14 years ago 4 replies

Has anyone had any experience with USB based pic programmers? I have been using a modified NOPPP but the programming speed is ...

Has anyone had any experience with USB based pic programmers? I have been using a modified NOPPP but the programming speed is getting to be a hassle. It takes way to long to program a 2k chip. The chips that I am using are the 16F628,877,84/A. If anyone could express


speed motor control

Started by schneiderjeanmarie in Piclist14 years ago

I would like to controle the speed of a DCC motor (12 V) by using an optical encoder. By this way I am expecting to have a constant...

I would like to controle the speed of a DCC motor (12 V) by using an optical encoder. By this way I am expecting to have a constant speed. For that I think to use a 16F628. Is that a good choice ? I have search over internet shem to help me in the design of the circuit,


Interrupt on change question

Started by Trent in Piclist14 years ago 30 replies

Hello all, I am using a 16F876 and I need two external interrupts to handle two optical encoder wheels. The original circuit...

Hello all, I am using a 16F876 and I need two external interrupts to handle two optical encoder wheels. The original circuit used a 16F628 and I had stayed away from using the port B 'interrupt on change' solution since I had read that these can be missed if they occur unde


ICSP standard ?

Started by Dave Mucha in Piclist13 years ago 6 replies

Hi all, I've been trying to figure the best way to connect pins for ISCP for a couple chips. 16F877 (40 pin) 16F873 (28 pin) and the...

Hi all, I've been trying to figure the best way to connect pins for ISCP for a couple chips. 16F877 (40 pin) 16F873 (28 pin) and the 16F628(18 pin) one thing that seems to be really consistant is the lack of consistance of which pins on a ICSP header are which. Can anyone offer some guidance ? I'm pretty tempted to use the Olimex


A to D converters and pic 16F628

Started by jmurba in Piclist14 years ago 4 replies

Hi List, I am a diver and dive a rebreather that is a system that recycle the exhaled gas. I need to make an oxymeter...

Hi List, I am a diver and dive a rebreather that is a system that recycle the exhaled gas. I need to make an oxymeter that calculated with 3 o2 sensors the gas loop O2 partial pressure. the sensor that is a fuel cell produces a signal that the tension is


Weirdest thing ever

Started by Anonymous in Piclist14 years ago 43 replies

I set up an extremely simple program to alternately blink 2 LED's. I have my output pins on my 16F628 connected to 470 Ohm...

I set up an extremely simple program to alternately blink 2 LED's. I have my output pins on my 16F628 connected to 470 Ohm resistors then to the LED. They don't alternate, but when I touch one of the resistors, then everything works fine. Any ideas??


16f628 bare necessities to run?

Started by dave in Piclist14 years ago 1 reply

I am new to pic programming, I am using MPLAB to assemble and compile the programs, then using micropro to send the data to the...

I am new to pic programming, I am using MPLAB to assemble and compile the programs, then using micropro to send the data to the chip via a usb k-128 board. I have tried using a 6MHz crystal and the internal oscillator but my program dosent seem to run unless I am physically touch


Emulator/ICE recommendations

Started by "Sco...@Work)" in Piclist11 years ago

Hello Group, I'm thinking about acquiring a better ICE for PIC parts and was wondering what, if anything other people are using. I've been...

Hello Group, I'm thinking about acquiring a better ICE for PIC parts and was wondering what, if anything other people are using. I've been working with 16F628/648 part up until now. I have the Microchip ICD2 but am pretty disappointed with it (single breakpoint at a time, extremely slow stepping speed, poor (non-existent) source code debugging). In the past when I was developing using 8032 ...


sound through a pic

Started by goldeagle98201 in Piclist14 years ago 2 replies

Does anyone have any ideas on how to play a wav file though a pic? I have 2 pic controlled automations, one using a 16f628 and one...

Does anyone have any ideas on how to play a wav file though a pic? I have 2 pic controlled automations, one using a 16f628 and one uning a 12f675, but I trigger the pics and play the sound using my laptop. I would like to make them indipendent of the loptop. To do so I would need


Flowchart-ish programming interface

Started by sinclan_ratatattat in Piclist14 years ago

Gday, OK laugh if you must, Im a longterm geek but Ive never cut a line of code in my life, besides the occasional shell...

Gday, OK laugh if you must, Im a longterm geek but Ive never cut a line of code in my life, besides the occasional shell script. Ive seen a few flowchart programmers on the net, is there one that is usable and free? Im starting out on 16F628's. My hope is that if I