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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
>>You've been building that programmer since Dec 2007, if you put $0.20 aside a day you could have bought a USB based programmer
I built my programmer in February 2008 and it is working.One fellow got interested in PIC programming so i gave him the shematic and he copied my...
Hi,
I have two identical PIC programmers(Propic2 over LPT port).One is working correctly,other is not.When i connect bad working programmer to PC and press Detect device button in WinPic800 software the message comes:
INTOSC Mode/internal MCLR enable
Detected -> PIC16F84A
DEV ID -> 0x560...
I found another schematics,which is a bit different.I Modified my programmer ant it works.
I attached the modifications i made.They are the same for Data,Clock and ACK line.
I checked the circui with digital multimeter and found thet when a pic is inserted and only data or clock are enabled the Q1 transistor collector's potential becomes 1.48 V.Emiter's and base potentials doesn't change.I have a theory that explains that:when PIC Vdd is not enabled,and we sent data...
Well i used WinPic at the beginning and results were the same as with ICprog.
Is it normal when LED is blinking and when pic is inserted and data or clock is enabled?
I can't understand how can data or clock affect the Led.Is it normal or i must check the circuit?
I measured all pins using ICprog and here are results:
PIC Not Inserted: PIC Inserted:
VCC: +4.89 (LED is ON) +4.89 (LED is ON)
MCLR: +13.16 (LED is OFF) +13.17 (LED is OFF)
CLOCK: +4.89(Led is OFF)...
I checked the circuit enabling from software and i found an interesting thing.
The circuit is here: **broken link removed**
As i understand the software checks whether the Ack (10pin on LPT) was inverted and if it heppens the interface is initialized correctly.
Suppose the PIC is not...
I would like to ask if PIC is inserted and i check Clock the LED must blink or not.
On my programmer it is blinking but only when PIC is inserted when not LED does
not blinking.Is it ok?
It only affects the led when PIC is inserted in the socket,when not the led is not
blinking.When pic is inserted and when i check Clock,the led is blinking with a high fqequency.Is it normal?
I built a programmer according this cheme:
**broken link removed**
it's David Tait's programmer modified a bit by Bob Blick.
I'm using WinPic sofware and PiC16F84A-04 controller.
I choose in Interface menu 7407(driver)+pnp transistor
When i press initialize message "Could not initialize...
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