Sunday, July 17, 2011

BC547 TRANSISTOR PIN CONFIGURATION


BC547 TRANSISTOR PIN CONFIGURATION

Saturday, July 9, 2011

mig welding circuit diagram

mig welding circuit diagram
mig welding circuit diagram arc welding circuit diagram welding circuits

Monday, June 20, 2011

simple wireless fm transmitter circuit diagram


simple wireless fm transmitter circuit diagram

Saturday, June 11, 2011

simple microphone circuit diagram


simple microphone circuit diagram

stereo fm wireless transmitter circuit diagram


stereo fm wireless transmitter circuit diagram

free circuit diagrams

source : http://freecircuitdiagram.com

Tuesday, June 7, 2011

Sunday, May 29, 2011

led flasher from bc547




led flasher from bc547

Friday, May 13, 2011

temperature regulator circuit




temperature regulator circuit

Tuesday, May 10, 2011

wireless servo control circuit diagram


wireless servo control circuit diagram

Sunday, May 8, 2011

infrared detector circuit diagram using bc557


infrared detector circuit diagram using bc557

bc557 transistor circuits

Wednesday, May 4, 2011

fire alarm circuit using ne555



fire alarm circuit diagram

ne555 circuits

alarm circuits

wireless microphone circuit diagram


wireless microphone circuit diagram,wireless circuit diagram

Tuesday, May 3, 2011

HT12E encoder rf wireless data transfer



HT12E encoder rf wireless data transfer

rf transmitter circuit diagram

data transfer circuit

4 bit transfer

Sunday, April 24, 2011

transmitter using four transister




http://www.geocities.com/Eureka/Park/5323

four transister transmitter

sine wave transmitter

4 transistor

Friday, April 22, 2011

ne 555 circuits - astable circuit




ne555 circuits, astable multivibrator circuits, ne 555 ic , hobby circuits with ne555

Saturday, April 9, 2011

electronic buzzer with ne55 ic




electronic buzzer circuit diagram with ne 555 ic

Saturday, January 22, 2011

Make a power board and control board

Get/Make a power board and control board.

You are going to need a control board and etched power board. The power board needs to be at least 3 ounce copper. Ebay is a good place to look for heavy cheap copper clad PCB. You could print this picture and press it onto a piece of heavy blank PCB, and etch it with a dremel if you have a very steady hand:
http://ecomodder.com/wiki/index.php/Open_ReVolt/Fab_Files

Picture 2 and 3 below is an example of an early power board I made with a Dremel.

You can get a control board from me or you can make the control board in your favorite PCB layout software using the schematic here:
http://home.cogeco.ca/~tkooistra/Cougar_Controller_Rev2C_Schematic.pdf
And here are some pictures of the PCB layers:
http://home.cogeco.ca/~tkooistra/bottom_layer_rev2C.pdf