Electronics: printed circuit boards
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My printed circuit album.
1 /: Printed circuit for NE 555 application in monostable Date of tracing and development: late 1989 It is for the design and the realization of a timer for domestic lighting that I used the Timer NE 555. Although I gave little importance to this realization, when my customers encounter difficulties with imported electrical equipment, I am forced to be of service.
This image is that of the printed circuit created for the use of two EPROMs of eight bits of data (two bytes in total). Such as 2732,2764, 27318, 27532, 27C1001 and others….
This printed circuit is created for the use of FETMOS CD 4001 and 4011 in astable or multivibrator.
This card is created for the control of spot lamps in two ways: logical, by data saved on EPROM. Analog, by sound waves picked up by microphone and amplified to excite TRIACS. Everything is wired on eight channels.
My printed circuit album: NE 555
2 /: RS flip-flop with NPN transistors 1980s This circuit board dates from the late 1980s. It is a NPN transistor assembly. I took the opportunity to produce 220 VAC turn signals. This product was adaptable with the use of high power transformers such as 110 / 220V / 10000V. This product is appreciated by Mr BOYER CEO of an advertising company established in Casablanca since the 1950s. In an interview between the two of us, Mr BOYER testified to it by telling me: It is the only flashing light held strong with a 110v / 10,000 volts 100ma transformer.
Astable with square signal for single or double channel flashing:
My printed circuit album: HEF 4069, M74HC04
Ciruit printed for two eproms 2764, 27128, 27256 and 27512.
Carte pour trois eproms 28 pins.
3 /: IC for EPROM 2732 and other 28 and 32 pin applications. Early 1990s When I started with ROMs or EPROMs, I had made several eight-channel or lane PCBs, after that I upgraded to a sixteen-channel or lane version as shown next.