WILL BE UPDATED
SWITCH REED Hamlin Electronics Limited Partnership
Part Number DRR-129 42-53-ND
Price BreakUnit PriceExtended Price
100 3.74000 374.00
Manufacturer Hamlin Electronics Limited Partnership
Manufacturer Part Number DRR-129 42-53
Description SWITCH REED SPST 3A 42-53 A/T
Lead Free Status / RoHS Status Lead free / RoHS Compliant
Type Glass Body
Must Operate 42 ~ 53AT
Must Release –
Switching Current (DC) (Max) 3A
Switching Voltage (DC) (Max) 400V
Switching Power (Max) 100W
Magnet Not Specified
Mounting Type Non-Standard (Axial)
Termination Style Axial (2 Leads)
there will be two system coils:
system 1 (8 coils on the bottom + 8 coils on the top, all in series)
system 2 (8 coils on the bottom + 8 coils on the top, all in series)
I think resistance of the one system coils will be less 2 Ohms
there will be two reed switches and power supply less than 3 Volts, because of wearing out reed switches contacts.
electric schematic idea looks like this:
I checked ohms on 4.5 coils (another half 5th coils end is on the spool ). It’s about 0.5 ohms, 0.1 per coil, 0.8 ohms – eight coils . When I finish bottom coils I’ll try to run disc on its with 1 – 1.5 volts.
from first run I’m disappointed. 3.5V – about 250 rpm. the fat reed switch keeping too long closed contacts. I can’t adjust:
but I have too much room for improvement (+another half million$ 😉 ). now I’m trying to play with small reeds. they are more adjustable for closed contacts time. or after this I’ll go to transistors, more complicated setups.
it’s still not OU because of silly test with silly crap reeds and batteries. one battery wasn’t dropping voltage for about 1 hour but I’m not sure if the reed sw. was working correctly. another battery is dropping voltage much faster doesn’t matter if battery’s places is changed between them.
will be updated. I heave some idea to use low esr capacitors to shorten pulse from reed switch. just don’t know when.