Automatic lamp Circuit

This series will work as the lighting will automatically turn on when the voltage net PLN off. If the net voltage on the series will off automatically.

Emergency Light chain scheme can be viewed directly on the image above

search

Components list:

R1 R2 C1 D1,D2 S1 Tr1 Trafo L1,l2 Batery

: 33 Ohm : 470 Omh : 470 uF/16v : 1n4001 : switch (push on push off) : BC 160 or BC 143 : 4,5 volt 200 mA : lamp 2,5 volt : NiCd 2x1,25 volt 2-4 Ah

Series of automatic lighting unit is very simple. Voltage electricity from the net PLN revealed by transformer Tr1 and change in DC with half-wave system by dioda D1 and capacitor C1.

Next portion 6 Volt DC is used to fill the 2 Ni-Cad Battery through R1 and D2 with a continuous flow of about 100 mA (charging current to a safe a Ni-Cad battery 2 Ah).

reverse bias between the base of emitor transistors T1 obtained from the voltage fall on the D2 will make transistors T1 does not work so that lamp will be off. When voltage net PLN suppressed, T1 base transistors will be biased flow through R2, transistors T1 will work and lamp on.

When the voltage net PLN entry, transistors T1 will does not work, the lamp will be off and the battery charged through R1 and D2

search

Circuit of Mouse Repellent

A simple series of mouse repellent is a oscilator the issue on the ultrasonic wave frequency range 20 - 40 kHz. The ultrasonic waves will not be heard in the ear, but we will be with the one for the mouse ear. Base Frequency will be modulation with a 50 Hz signal is obtained from the frequency PLN through capacitor C4 (to avoid a mouse immune to it) so that the resulting swing frequency between 20 - 40 kHz periodically. Effects experienced mouse feels very good, seems like we are at a music concert with the rhythm of perplexedly ragged and could not enjoy at all. (What the human ear will not hear at all).

search

Components list:

R1 R2,R3 C1 C2 C3 C4 C5 D1,D2,D3,D4 IC1 TR1 TD1 F1

: 1 K : 15 K : 1 nF : 1 uF/16v : 100 nF : 220 nF : 1000 uF/16v : 1n4001 : LM 555 : Trafo 6v/200mA : Speaker twiter : fuse 100 mA

Heart of a series of repellent electronic mouse is a type of IC 555 that have been very popular, cheap and versatile. Use of the piezo electric loudspeaker (tweeter speaker ) so that the ultrasonic frequency is more effective. Electronic rat repellent is effective for rooms up to 200 m2 area of origin appropriate placement. Can be placed in the top corner of the room so that its frequency noise can be spread to all rooms without a hitch. Turn on continuously to ensure that the mouse does not come again.

Circuits of audio pre-Amp mic

A microphone preamp is a preamplifier used to amplify a microphone's low output voltage to a stronger, more usable level. A microphone preamp must provide stable gain for small signals without being sensitive to induced noise from cabling and without distorting large amplitude signals. Most microphones must be used in conjunction with a microphone preamp to function properly.

Simple audio Pre-Amp mic

search

This circuits use infront an RF oscilator to make an RF transmitter that is very sensitive to sound

Circuit of Power supplay

12 volt dual voltage power supplay

• Transformator 18v-CT (min)
• Capasitor 35v
• Bridge Rectifier 2 Ampere /100 v
• c4, c5 Ceramic

12 VOLT 20 Ampere power supplay


Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 20 amps.

Circuits of Audio Booster

Audio booster with transistor


The 2N3392 transistor is a (cheap) low-power, low-noise and high-gain. If you wish to use a TUN, cross reference the parameters with one of the units from this list:

Potentiometer R5 of 100K is a linear type. The value of C1 may need to be between 0.05uF and 0.1uF (47nF/100nF). Experiment with the value for best performance.
Capacitor C3's working voltage should be at least 16V.

Circuits of Infra Red Sensor

Circuit of Movement detectors


Photodioda as removing the transmitter beam infra red with the pulsation frequency 5KHz, then the pulsation will be reflection by reflector in front of it. and received by the phototransistor as the receiver. The detected object is located between the transmitter-receiver with a reflector.

Circuit on the left is the transmitter modulation circuit that produces infrared 5KHz throbbing. On the right side is the receiver circuit, there is a resonance tuned amplifier. Band width it can control so the receiver circuit can catch the beat of the transmitter modulation 5Khz. Bandwidth control is also working to reduce the sensitivity of the effect of light in the surrounding areas.