10. Soldering the Lasershield

I do not know how to solder the pins (that connect to the Arduino pins) from the wrong side so I just placed them on the top side of the PCB and pushed the tips through.

To safe some time I wrote on the PCB were the parts for the laser driver should go. Side note: for test runs without laser you can leave out the circuit for the laser for now.

Partslist:

Part Value Device Package Description
VR05R051 RR1A RR1A RR1A RELAY
C1 0,1uF C-US075-052X106 C075-052X106 CAPACITOR
C2 47uF CPOL-USE2.5-5 E2,5-5 POLARIZED CAPACITOR
D1 DIODEDO-1N4148 DO-1N4148 Diode
D2 SA15A ZENER-DIODEP1-Z12 P1Z12 Z-Diode
FAN W237-102 W237-102 WAGO_SCREW_CLAMP
IC1 LM317TS 317TS VOLTAGE_REGULATOR
J1 J30MM J30MM 30 Bridge
JP1 PINHD-1X2 1X02 PIN_HEADER
JP3 JP1E JP1 JUMPER
LASER W237-102 W237-102 WAGO_SCREW_CLAMP
R1 3,9 R-US_0414/5V 0414V RESISTOR
R2 2K2 R-US_0207/10 0207/10 RESISTOR
R3 51 R-US_0414/5V 0414V RESISTOR
R4 1k R-US_0414/5V 0414V RESISTOR
R6 500 TRIM_US-S64W S64W POTENTIOMETER
SV1 MA04-1 MA04-1 PIN HEADER
SV2 MA04-1 MA04-1 PIN HEADER
T1 2N2222 2N2222 TO18 NPN TRANSISTOR
U$1 EASYDRIVER EASYDRIVER EASYDRIVER Easydriver v4.4
U$2 EASYDRIVER EASYDRIVER EASYDRIVER Easydriver v4.4
U$4 ARDUINO-NOHOLE ARDUINO-NOHOLE ARDUINO-NOHOLE Arduino Diecimila/Duemilanove/Uno

I have also included an exported shopping list from my electronic merchant as it is sometimes a bit daunting looking up all the parts with different descriptions.

NOTE:
I did order the wrong relay from my electronic supplier so I ripped apart an old pc power supply I found in my electronic chest of wonderments. I am actually quite glad I keep alot of the “old stuff”. Most of the electronics are still working. I rather keep them instead of making the recycling depot happy. They sell it to Africa as “2nd-hand” which is not realy the truth.
Hence I have build this laser. Show people that “the old stuff” is no junk. In the right hands it is as precious as real money.

NOTE #2 (important):
When connecting the Arduino with installed board be sure to connect the external power supply FIRST.
I noticed that when connecting the Arduino to USB first with out power supply the motors start to scream. This does not sound healty. Remember the movie “Screamers” ?

 

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