KITS AVT EDU633 Alarm Clock Educational Soldering Kit User Manual
- June 8, 2024
- KITS
Table of Contents
KITS AVT EDU633 Alarm Clock Educational Soldering Kit User Manual
A practical clock kit with an alarm function. Outfitted with a straightforward LED display and brightness regulation circuit, conditional to the ambient light, the Alarm Clock maintains operation even when the power supply is cut.
Specifications
- time display in hour, minute format
- alarm clock with snooze function
- simple, two-button control
- automatic display brightness regulation
- power supply: 5 VDC (USB B cable – not included)
How to use
You can control the alarm clock with the use of two buttons: MODE and SET.
Diagram picturing the use of the clock is shown on Figure 3.
Figure 3. Diagram picturing the use of the clock
While the clock is working, pressing and holding the S2 button will turn the
alarm on/off. When the alarm is activated, the display will show the set time
for a few seconds.
The diode set by the minute number shows whether the alarm is on or off. If
the alarm is active, the diode is on
After the alarm starts, pressing either of the buttons shuts it off,
activating the snooze function (the alarm diode starts flashing). After the
alarm starts again, pressing either of the buttons starts the snooze function,
etc. Really great function for the laid-back.
To turn off the alarm and the snooze press and hold the S2 button. The alarm
will also turn off after leaving it unattended for approx. 90 seconds. To
completely turn the alarm on/off press and hold the S2 button while the clock
is in normal mode.
The quickest way to learn the functions of this alarm clock, is to try it in
practice. After a short while the use will become intuitive.
Figure 1. Schematic diagram
Figure 2. Position of the elements on the printed circuit board
Recommended assembly order:
R1-R3, R17:………….4,7kΩ resistor (yellow-violet-red-gold)
C2-C4:…………………..100nF capacitor (can be marked as 104)
C1:…………………………22pF capacitor (can be marked as 22)
US2:………………………PCF8583P + IC socket!
R4-R11, R18:………..100Ω resistor (brown-black-brown-gold)
US1:………………………ATMEGA8A + IC socket!
T1-T5: …………………..BC557 or similar !
Elements set on the soldering side
PIEZO:…………………..buzzer with generator !
C5:…………………………100µF capacitor ! (mounted on its side)
DISP:……………………..4 number display
S1, S2: …………………..microswitch
R12-R16:………………1kΩ resistor (brown-black-red-gold)
USB:………………………USB socket
D1, D2: …………………BAT43 diode!
Q1: ………………………..32kHz resonator (mounted on its side)
PH1:………………………photoresistor
BATT:…………………….CR2032 battery
Begin by soldering the elements
onto the circuit board in order from smallest to largest.
When assembling the elements marked with “!” pay attention to their polarity
and placing of the notch.
To get access to assembly tips and high-resolution pictures, download the .pdf file.
Assembly instructions
- Touch the tip of the soldering iron to the end of the element near the soldering field
- Next, apply tin solder
- After the cone forms, remove tin solder first, and then the soldering iron
- The whole process should take approx. 2-3 seconds
The cleanness of the soldered surfaces, right amount of flux in the solder,
adequately high temperature (320-360°C), and sufficient amount of solder are
necessary to complete a correct bonding.
Too much tin solder can result in forming a ball instead of a cone or joining
of two adjacent soldering points.
Inadequate temperature, amount of tin solder or impurities can lead to so
called “cold solder joints, i.e. solder and the flux can’t moisten the two
surfaces and the resulting solder point is fragile and in time will oxidize,
break, and stop working.
AVT SPV Sp. z o.o.
Leszczynowa 11 Street, 03-197 Warsaw, Poland
http://avtkits.com/
This symbol means do not dispose of your product with your other household
waste.
Instead, you should protect human health and the environment by handing over
your waste equipment to a designated collection point for the recycling of
waste electrical and electronic equipment.
AVT SPV reserves the right to make changes without prior notice.
Assembly and connection of the device not in accordance with the instructions,
unauthorized modification of components and any structural modifications may
cause damage to the device and endanger the person using it. In this case, the
manufacturer and its authorized representatives shall not be liable for any
damages arising directly or indirectly from the use or malfunction of the
product.