Hi Frank,
great idea to use relays because their function is quite simple to understand – and they are still working in many applications around the car / house / machine area – thanks!
The history of the Lectron relay:
- since 1966 a component of the “Ausbausystem 2” set: 300 Ω, 9V, without diode = #8054 / #8100502
- since 1975 with “Funktionsmodelle” a second version for 5V, 70 Ω, (TTL driven) without diode, #8100506
- undated: Mr.Birett had built a prototype with one diode for Physics teaching
- undated: Mr.Gürth used his own version to store 1 bit (TTL introduction)
- until the 199x years both versions were available, but with different relay types: 70 / 130 / 180 Ω
- since 2001 (RWO) the actual version with diode: 5V, 70 Ω, as #2504
Best,
Günther