Wireless water level switch
Description
Level switch PWB assembly consist of detector, transmitter and receiver as shown in Figure1.
Detector
The detector detects small current between conductive stand and probe.
It has Normal and Reverse mode.
Normal: off -> on (level up)
Reverse: off -> on (level down)
The detector may transmit the signal to transmitter 33m long by 2-wire current.
Transmitter
The transmitter supplies power with the detector and tells receiver 6km far.
The body includes step up DC-DC converter for 1.5V x 2 batteries.
Enoki recommends to adopt fine battery holder that has Ni plating electrode well.
Poor Ni plating causes abrupt power down.
Receiver
The receiver turns on/off pump through SSR[1], when it receives the signal.
Distribution
Enoki will distribute Detector PWB Assy, Transmitter and Receiver PWB Assy in near future.
If you have any request and need other probe or some thing, Enoki will ship them
in the world.
The photos shows prototype, so the actual PWB Assy may be different.
Payment
Enoki accepts US$ by PayPal[2]. Enoki and the customer have to pay 4.2% fee
in the US$ one another.
Ref
[1]
SSR and Heat Sink 40amp
[2]
Fees for Selling and Accepting Payments
Figure1 Block diagram
Stock
Search
If you want to look up 1k value parts, enter 1001 or 102 to search string
in the below input box, you will find the searched stock. Mass unit is 0.1g,
therefore the value 2 means 0.2g.
Part type prefix
Input a prefix of part type name abbreviation
Variable resistor
1-turun variable volume: vr, 15-turn trimmers: tmr.
Switch
tact switch for PWB: sw.
Wire
AWG24: AWG24 (0.2SQ) UL1007. QTY unit is metric length m.
Capacitor
cc: ceramic capacitor (MLCC) with 5mm pitch and 0.5mm lead wire
diameter, cd: disk ceramic capacitor, and cf: film capacitors.
The capacitance is expressed with 3 digits 104 for example. It means 10x104 pF
therefore 0.1uF. Default pitch is 2.5mm, p50 means pitch 5mm.
Connector
2.5mm pitch connector. ei: EI (Tyco),
pin available for bread board, XH (JST Clone).
ei2pL_0-171826-2 is 2 pin right angle pin header. H and c are housing and
cap housing. Pin and Rec means contact pin and receptacle (female contact pin).
Resistor
metal film: rf, carbon film: rc, metal oxide: ro, cement: rs
1/4W axial metal film resistor 1% 50 or 100 ppm/°C.
Color band code shows resistor specifications shown in Figure1.
rf560212 means that metal film, 56kΩ, 1% tolerance and
50 ppm temperature coefficient.
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