MY E-BLOCKS          
ELECTRIC & ELECTRONIC  BUILDING-BLOCKS
for LEARNING & TEACHING from 1960 ... 2020+

AN  EXPERIMENT ...
< This Chapter was made because bordom in "CORONA(2020-22)LOCKDOWN" >


... Take a  MULTIVIBRATOR-DIAGRAM - Make it with the Blocks, e.g.:



Exchange Resistors and/or Capacitors and observe results:
t1 ~ R1*C1 ;   t2 ~ R2*C2 ;   T = t1 + t2 ;   f = 1/T

... In this Moment the  OSCILLOSCOPE  reads:
T = ( .2 + .5 ) msec = .7 msec   ==>>   f = 1/T = 1429 Hz

THE  BUILDING-BLOCKS:



... Resistors, Switches, Keys, Spools, Relays, Loudspeaker, ...



... Capacitors, Variable Capacitors, Potentiometers, ...



... Ge- & Si-Diodes, ZENER-Diode, LDR, PNP- & NPN-Transistors, ...

... ( 1965 - 1986 ) "E-WERKSTATT-HILFEN"    "ENTWICKLER-IDEEN" ...



Glimmlampen-Indikator für Isolationsprüfungen
Transistor-Multivibrator im Tastkopf
Transistor- und Dioden-Tester
Signalverfolger-Tastkopf
Mapping-Test = Ein preiswerter Kennlinienschreiber
Kleine Widerstandsdekade
Wobbelbarer Nf-Generator
"Kalte-Lötstellen"-Tester & Morse-Trainer
Leistungstransistoren, Thyristoren u. Triacs preiswert testen
Kompakte Hochlast-Experimentier-Widerstandsdekade
Vielseitiger Telefon-Lautsprecherverstärker

... Using also the didactic INSTRUCTIONS of HEINZ RICHTER / KOSMOS ...



... with the »ULTRON« / KOSMOS   ( see MULTIMETERS ... )
                        ... and my TRANSFORMER in a TEA-CAN ...



... and with my Multi-Purpose Battery/Charger/Power-Supply ...





... Have a Look at my "professional" Power Supplies ...
... + RESTORATION OF A WWII TELEGRAPH SET ...
... + HOW A TELEPHONE DIAL SYSTEM WORKS ...

*****   T H E   H I S T O R Y   *****

All started 1956 in (WEST-)Berlin with learning the MORSE CODE ...



and with the design of my SHORT-WAVE-AMATEUR-RECEIVER ...



... Ready to LISTEN THE WORLD ...

... also a »KYORITSU« GRID-DIP-METER(*) became necessary ...


(* µA-Meter makes a Zero-"Dip" in Resonance )
... to measure "Resonance-Frequences" of LC-Circuits !!

... continued with my TUBE-EXPERIMENTAL-KIT ...



... For powering VACUUM TUBES with 250 VDC & 6.3 VAC,
I bought and assembled the »UNIVERSAL-NETZGERAET« Kit
from »RadioRIM« / Munich in 1962

Attracted to ZEITGEIST »CYBERNETICS« N.WIENER + K.STEINBUCH ...

       

Ein "LICHT"-EXPERIMENTAL-BAUSTEIN gebaut 1963 ...
Ein "ZEIT"-EXPERIMENTAL-BAUSTEIN gebaut 1964 ... 



... and beyond into IC-TECHNOLOGY / Building-Blocks ...



... LEDs, OpAmps, Registers, Multiplexers, Function Generators ...



!!! WOW !!!



The E-LABOR needs also 115 VAC (= USA ) realized with
(a) ISOLATION-TRANSFORMER in a COOKIE-BOX ( Picture above )
(b) VARIABLE-TRANSFORMER ( Picture below )



( Input = 220 VAC / Output = 0 ... 260 VAC / 520 VA / 2 Amax )


With  BATTERY-PACKS out of RECYCLED Li-Ion-Cells ...
and with  MULTIMETERS  for Development & Repair ...
and  D E M O S   and   P R O J E C T S ...

... F O R   F U N  with CHILDREN of Friends & Neighbors,
these E-BUILDING-BLOCKS / "An Electro Technics Primer"
had planted the wish "to become also an ENGINEER" ...

... As HERAKLIDOS has said:
" Teaching is NOT filling Buckets - It has to SPARKLE MINDS !"
impressum:
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© C.HAMANN      http://public.BHT-Berlin.de/hamann        10/07/23