Velleman EDU01 User Manual
Page 29
www.vellemanprojects.com
Pag. 29
Required parts: 9V battery, 10K resistor (brown black orange gold), 470K resistor
(yellow purple yellow gold), buzzer, 2x BC547 transistor, 2 wires
How it works: The 2 sensor wires
must be placed in a tank at a certain
distance (e.g. use a drinking cup). Fill
up the tank with a conducting liquid
(e.g. water) until the level reaches
both sensor wires. A small current
will flow via R2 towards the base of
T2. The base is protected against
interference with a resistor R1.
T1 & T2 are configured as a Darlington switch hence only a very small current is needed
to make T1 conduct and activate the alarm sound.
See also other documents in the category Velleman Hardware:
- NC3MDL1-B (2 pages)
- NC3MXX (1 page)
- NC5FDL1 (2 pages)
- NC3MDL1 (2 pages)
- NC5MX (1 page)
- MK166 (1 page)
- К8095 (9 pages)
- VMa02 (4 pages)
- VM8090 (1 page)
- VM116 (32 pages)
- EDU02 (28 pages)
- VM202 (1 page)
- NL4MP (1 page)
- NC3MXX-BAG (1 page)
- VM120 (48 pages)
- VM153 EU (1 page)
- VM119 (32 pages)
- VM133 (24 pages)
- VM148 (24 pages)
- MK155 (1 page)
- VCC6 (20 pages)
- MK179 (2 pages)
- VMa04 (4 pages)
- VM122 (44 pages)
- VM134 (24 pages)
- NAC3FCA (1 page)
- VM121 (32 pages)
- К8048 (15 pages)
- К8048 (14 pages)
- VM150 (1 page)
- VMa01 (4 pages)
- NL4FX (2 pages)
- VM152 (20 pages)
- MK157 (1 page)
- VM112 (4 pages)
- VM130 (20 pages)
- NC3FXX-BAG (1 page)
- MK160 (1 page)
- NC5MDL1 (2 pages)
- VM118r (36 pages)
- VM179 (2 pages)
- VM192ir (2 pages)
- VM138 (40 pages)
- VM160 (20 pages)