Documentation PMIN Programmer, - controling by the Port LPT.

This text is addressed to those who are interested in electronics, and who would like to set up such a gadget by himself. The placed technical information, needed to produce it, is completely gratis on condition that it will be used only for own needs and it will not to be used commercial activity.

You can take then placed illustrations in then greater precise by ONclick on illustration.

The general description

The PMIN programmer is the programmer "minimum". It is used in service, programming of programmatic memory of microprocessors or/and controlling other ICs to be programmed. It is constructed on the base of typical logic ICs of HEF or CD family. It has been made in the aim to simplify, as much as possible, electronics and to reduce the costs, but at the same time with the care of that to be the gadget which can serve as most ICs as possible.

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To feed the programmer you can use every typical feeder 12V, giving the current minimum 0,5A. The feeder may be stabilized, non-stabilized, and may give too the alternating voltage. The voltage of the feeder would be in the bounds of 10V to 15V. The polarization in the line connecting feeder with PMIN is of no importance - notice concerning the case of the feeder giving the constant voltage. On the side of feeder's socket there is the socket 25 pin (MALE), to which you connect cable-extension - such as for the cable of printer. On the other side the programmer is equiped too with the socket 25 pin (FEMALE). This socket serves to connect (insert) Adapters. Adapters can contain different kinds of stands: DIP, SOIC, PLCC and different quantity of leading out, according to needs or assignment.

Transmitted signals to / of Adapters
Voltage signals		Logical signals
GND	mass	Vi	OUT: eight signals CMOS, (i=0,...,7)
5V	OUT: 5V constans voltage 200 mA max	X0,X1,X3	OUT: three signals TTL/CMOS
H5L	OUT: 0V/50mA, 5V/CMOS or 12V/5mA	X2	IN: one signal TTL
U5	OUT: 0V/CMOS or 5V/50mA	X4	IN: one signal CMOS
		Di	IN/OUT: eight signals CMOS, (i=0,...,7)
Attentions on theme of voltage Vpp
Current Ipp, - only for voltage of programming Vpp=12V (in signal H5L) depends from producer of integrated circuit and from technology his realizations. In records of firm Atmel, for microprocessors of series x89, maximum current Ipp is given as value <= 1mA. In records other firms, maximum current Ipp is given as value 50mA, 75mA. And in many records generally is not given at all. In some records is possible meet even attention: "that was not this tested". In converter DCDC (MC34063) converting 5V on 12V, to enlarge efficiency current for exit voltage 12V, one should use suitable choking-coil (on schema choking-coil 56uH). In presented solution one used miniature choking-coil. Passive resistance such of miniature choking-coil carries out about 1.5 Ohm. If will come into being it is necessary possessions of signal Vpp about greater current, one should use choking-coil 40uH to 60uH but about smaller passive resistances. That means that choking-coil should be wound thicker wire. In dependences from passive resistances choking-coil, one should choose resistor (on schema: 1.5 Ohm) so that sum this resistor and passive resistances choking-coil leveled 3 Ohm. Computational Details - look specification for MC34063. In presented electric schema, at use suitable choking-coil, obtainment of current efficiency to 100mA in consecutive manner for 12V - not state greater problem.

In the gatget there were applied
ICs		Transistors (or equivalents)
HEF4014	1 piece	BC238	1 piece
HEF4094	2 pieces	BC237	2 pieces
HEF4066	2 pieces	BC307	1 piece
7805	1 piece	BC211	1 piece
MC34063	1 piece
Diodes		elements induction
diode SI	1 piece of switching-over, min 10mA, 0.7V	22uH	2 pieces, miniatures
schotky	1 piece version SMD 1A/50V	100uH	1 piece, typical in circuits of feeding
LED	2 pieces, 5mm, red and green	56uH	1 piece, which passive resistance 1.5 Ohma
GRAETZ	1 piece, 1.5A/50V
Resistors		Resistors
1.5 Ohm	1 piece	4.7K	2 pieces
20 Ohm	1 piece	6.8K	1 piece
100 Ohm	2 pieces	10K	9 pieces
560 Ohm	3 piece	22K	1 piece
1K	3 pieces	470K	1 piece
2.2K	14 pieces	P470 Ohm	1 piece, standing, precise regulation from top.
Condensers		Condensers electrolytic
470pF	1 piece	22uF	1 piece, /16V
2.2nF	4 pieces	470uF	1 piece, /25V
10nF	1 piece	470uF	1 piece, /16V
100nF	1 piece	100uF	1 pieces, /16V
		100uF	2 pieces, /40V
Sockets		Sockets
1 piece, typical feeder's socket for 5 to 24V, connector 6 mm		1 piece, 25 pin FEMALE
		1 piece, 25 pin MALE

electrical scheme	printed plate	arrangement of elements

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