1
2
3
4
5
6
7
Features:
This circuit is an alternative to the many parrallel port PIC programmers that use the 7407 or 7405
type buffers.
The 74HC14 buffer is used because of easier availability in some countries ( idea from Gary
Aylward's programmer ). It is a Schmitt trigger type which has very good switching performance.
In Circuit Programming (ICP) is included, Q6 performs a reset pulse just as VPP is switched to the
target PIC to ensure the pic oscillator is stopped.
Regulator for VPP is adjustable to trim out losses across the circuit and obtain the correct voltage at
the PIC.
PLMS-OziPic'er Issue 2.
Microchip PIC programmer Hardware
designed for
Nigel Goodwin's
WinPicProg Software.
Suits common 8, 18, 28, 40 Pin PIC's
Option to eliminate using a 40 pin Aries ZIF if desired.
A narrow socket is fitted inside the wide socket. The wide socket
must have its tie bars cut off to be able to slip the narrow 28pin
(or 2x20pin header sockets) inside it, see photo. This enables
wide and narrow Pic's to be programmed without a ZIF socket.
Remove or drill out unused socket pins to make the PIC's insert
il
D
D1
1N4004
3
C1
100uF, 25V
Norm
Invert
Invert
Invert
Invert
Invert
1
D2
D3
D4
D0
D1
Ack
D3
1N4004
2
OP
+
NEED FOOTPRINT FOR THIS
VDD
VPP
VPP40
Dout
CLK
Din
IP
1
+
Vin
C2
10uF
R21
X3
3
+
R19
470
VCC
VDD
C3
1uF
VPP
D5
Green
240
1
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
VPP40
+5V
VR1
2K4
Vpp Adjust
Screw Terminals
VPP
X1
C
To PC printer port
U1F
LPT D0
13
LPT D0
RB7
1K
LPT D1
RB7
RB6
RB7
RB6
VDD
VDD
RB7
RB6
SOCKET40X0.3
Data
R1
12
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
C
to IC sockets
74HC14
VDD D2
U5
U1E
VPP D3
VPP40 D4
11
LPT D1
10
RB6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
VPP40
Clock
VDD
to IC sockets
74HC14
VPP
U1C
6
LPT ACK
5
LPT ACK
VCC
74HC14
R9
4K7
U1D
9
VDD D2
DB25M
8
R8
VDD
to IC sockets
R2
1K
VPP
Q1
BC557
D11
Yellow
4K7
R7
74HC14
4K7
R18
470
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
Wide for ZIF or socket
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
D
U4
U3
MC78L05C
+13V
GND
1N4004
1N4004
DC SOCKET
U2
LM317
D2
Narrow, fitted inside wide socket
WINPICProg Settings
D4
Vdd Regulator
2
X2
Vpp Regulator
ADJ
AC/DC power In - approx 15V a.c. or 17V d.c.
8
RB7
RB6
RB7
RB6
VDD
VDD
RB7
RB6
SOCKET40X0.6
B
B
NOTES:
R12
74HC14 power is pin 14 to Vcc, Pin 7 to GND.
VCC
All resistors are 1/4.
All caps are 16V or better unless marked.
Use 35V for C1 if exceeding 16V AC on
power supply.
4K7
R10
4K7
VPP D3
U1A
1
VPP
1N4148
Q2
BC557
Q4
BC548
R11
+13V
4K7
R3
1K
to IC sockets
R4
1K
X4
D12
Red
4K7
74HC14
Parts Alternatives.
BC548 - BC547, BC549, BC107*, 2N3904*
BC557 - BC558, BC559, BC157* ,2N3905*
1N4148 - 1N914
VDD
R20
D7
220
VCC
* Check pinouts & re-orientate.
R14
4K7
A
2
R13
D6
VPP40 D4
PIC placement (same as P16PRO by B.Dobaj).
40 Pin - Top of sockets.
28 Pin - Top of sockets.
20 Pin - Bottom of sockets.
18 Pin - Bottom of sockets.
8 Pin - Pin 1 of PIC to pin 3 of the socket .
U1B
3
4
R16
R17
4K7
4K7
Q5
BC548
R15
+13V
Q3
BC557
1N4148
D9
C4
0.01
1K
D10
D8
4K7
VPP40
74HC14
1N4148
R22
1K
ICP Header
ICP MCLR Reset
1N4148
to IC sockets
R6
1K
R5
1K
A
D13
Red
See Nigel Goodwin's WinPicProg Software, for
types supported.
Title
Size
By PLMS Designs, Adelaide Australia.
For the WinPicProg Web Site
PLMS OziPic'er Issue 2 - for WinPicProg software
Number
Revision
A3
Date:
File:
1
Q6
BC548
R23
VPP combined
1N4148
RB7
RB6
1
2
3
4
5
6
2
3
4
5
6
19-Feb-2003
Sheet of
D:\Client98\..\PLMS-OziPic'er- issue2 Protel.sch
Drawn By: PLMS Designs
7
8