Electronics

TBA810 Integrated Circuit

This amplifier circuit is a compact design AF amplifier based on the TBA810 Integrated Circuit. Its low consumption and compact dimensions make it ideal for all kinds of audio amplification applications. The circuit incorporates an overload protection circuit and volume control. In addition, the circuit has low/high impedance inputs which can be connected to any audio source.

Specifications:

Supply voltage: 12 to 16V DC / 0.5A - (Need a Power Supply?)
Based on the TBA810 Integrated Circuit
Input sensitivity: 100mV / 47K Ohm
Output power: 7W Max. / 4 Ohm
Frequency response: 40Hz to 18KHz (-3dB)
Includes volume control
PC board dimensions: 1.75" x 2.25"

stereo amplifier module

This is a 1 watt per channel, stereo amplifier module Kit using two LM386N IC’s from National Semiconductor. It is basically two of our CK700’s on a single PC board, with a dual gang pot. It will operate best from 6-12V DC and will work well from a battery since the quiescent current drain is only 10 mA. It requires no heat sinks for
normal use. The input and output are both ground referenced. Maximum output will be obtained with a 12V power supply and 8 ohm speaker, however it is particularly suitable for driving headphones from a supply as low as 4V.

Specifications:

L: 2-1/2" W: 1-3/8" H: 1"
Requires external 4-12 volt dc
(Need a Power Supply?)
Power output : > 1 Watt max. @ 8 ohms, 12V DC ~ 0.4 Watt RMS cont. per channel

Stereo Amplifier Kit

6-10 Watt Stereo Amplifier Kit
Kit 143 is a class AB stereo audio power amplifier designed for quality hi-fi applications using a TDA2005 module. It is easy to construct and has a minimum of external components. The module has output current protection and thermal protection. This is the data book circuit which produces an excellent sound. The supply voltage required for this kit is 8 - 18V DC at 1 to 2 Amps. Maximum output power will only be obtained with a power supply of at least 2A at 15V DC, and using 2 ohm speakers (or 2 by 4 ohm speakers in parallel). However approximately 4W per channel can be obtained with only a 15V DC, 1A supply into 4 ohm loads. The power supply should be well filtered to reduce mains hum, the on board capacitors alone are not adequate for this purpose but are necessary to ensure stability. Extra filtering is unnecessary if operating from a battery.

We spent a lot of time getting the tracks right on this single sided PCB to get the lowest possible THD. Getting the separate tracks to the earth pin is the secret.

Specifications:

L: 3" W: 1-7/8" H: 1"
Requires external 8-18 volt DC @ 2 Amps for Max Output
(Need a Power Supply?)
Frequency response : ~ 15 Hz to 50 kHz, –3 dB

amplifier designed

This Electronic Kit is an amplifier designed with portability in mind; ideal for battery applications. A full watt from each channel, excellent fidelity. Uses a Samsung KA2209 IC. Small size, circuit board is 1-3/8" x 2". All basic parts supplied, including PC board; you supply two 8 ohm speakers. We suggest a six volt or nine volt battery pack using AA cells; Use D cells if extra long battery life is required. Amplify your CD or Walkman etc - DIY Kit 8.

Specifications:

L: 1-3/8" W: 2" H: 3/4"
Requires external 6-9 volt dc
(Need a Power Supply?)
Output up to 1 watt per channel

Stereo Preamplifier

This Stereo Preamplifier (Kit 100) is based on the TDA1524A IC. It contains all the components to build a tone control & pre-amplifier unit. Signal processing is done in the TDA1524A by voltage controlled amps and filters.

Specifications:

L: 4-1/2" W: 2-5/8" H: 3/4"
Requires external 12-14 volts dc
(Need a Power Supply?)
Control Volume, Bass, Treble, and Balance
On/Off Switch built into Volume Potentiometer
RCA style jacks for inputs and outputs

Radar

Parking Radar Kit
If you have problems parking then this kit is for you. Using (ultrasonic) sound waves, whose frequency is beyond our range of hearing, we can measure a distance. Consequently, a sensor mounted at the back of the car can give an indication of the distance between your car and the car parked behind you or other obstacles (only at the same height as the sensor). When the preset minimum distance is crossed, an audible signal is generated.

Specifications:

detection range: 5cm - 1.5m (adjustable)
detection angle: 5°
supply voltage: 10 - 15V DC / 16mA
PCB dimensions:
sensor: 1.1" x 3.7"
base: 1.9" x 4.9"

Transistor Ignition Kit

Electronic Transistor Ignition Kit
Gives your car the feel of an expensive luxury car. Better starting and smoother running, particularly at very high and very low RPM. Lower fuel consumption, less pollution, lower servicing costs. Drive economically, drive electronically. Only for petrol/gasoline engines. Only for cars with negative ground. Can also be used on motorcycles, mowers, boats, etc.

Specifications:

max. current: 4A
connection speed: up to 500kHz
PCB dimensions: 2.8" x 1.4"