udhay_cit
Full Member level 6
I have a resistance decade box from IET Labs. They are providing circuits & values of their products. Now i need to construct one for myself. I found one DIY project from internet search... **broken link removed**
This project using decimal thumbwheel switch so the number of resistance required for each decade is 9 in count. But the advantage is all 9 resistance in the decade has the same resistance value.
The IET Labs RS-20x products are using only 5 resistors per decade. I hope they are using BCD thumbwheel switch but still i have doubt in that. unfortunately i have no BCD thumbwheel switch in stoke.
Can anyone verify or confirm the type of the thumbwheel switch? The attached document has the internal PCB layout of the thumbwheel switch.
This project using decimal thumbwheel switch so the number of resistance required for each decade is 9 in count. But the advantage is all 9 resistance in the decade has the same resistance value.
The IET Labs RS-20x products are using only 5 resistors per decade. I hope they are using BCD thumbwheel switch but still i have doubt in that. unfortunately i have no BCD thumbwheel switch in stoke.
Can anyone verify or confirm the type of the thumbwheel switch? The attached document has the internal PCB layout of the thumbwheel switch.