Tobi's Corner » other

LED Lamp

theFloe — Wed, 30 May 2007 13:19:33 +0000

Part List:

some High Power LED’s
thermal pads (thermally conductive, electrically insulating, double coated tape)
alu L profile
wires
costant current driver matching your LED’s

Step1: align the number of LED’s your LED driver can handle equaly spaced on the profile. drill a hole at each end of the profile, so you can put the wires through.

Step2: cut the thermal pads to the size of the leds and tape them onto the leds. after that tape the leds onto the profile.

Step3: connect the LED’s in series

Step4: I used double coated tape to mount the driver on the LED’s side. make a knot in each wire before putting them though the holes, so you can use the wires to mount the lamp to the ceiling.

audioFM

theFloe — Mon, 25 Dec 2006 10:47:09 +0000

Do you want to listen to MP3 on your radio? But yout radio doesn’t have a AUX IN or any other Input? Then audioFM can help you. audioFM takes audio signals from a headphone plug and converts it into radio UKW FM signals.

The heart of this small FM Modulator is a tuneable voltage controlled oscillator (VCO) from Maxim-IC called MAX2606. This VCO operates from 70MHz to 150MHz and has a up to -8dBm differential output amplifier.

Note: in many countries it’s not allowed to broadcast in the UKW (normal Radio) frequency bands!! So use this at your own risk!

The schematic:

Simple & small! The PCB only measures about 28 x 22mm!!

The audioFM project is based on schematics found in the Internet and from Elektor Magazine!

IPAQ Cradle Mod

theFloe — Sun, 12 Nov 2006 10:48:04 +0000

How you can use your IPAQ 5450 Carddle to connect anything to your IPAQ.

Connector Pin out:

V_ADP
V_ADP
V_ADP
V_ADP
Reserved
RS232 DCD
RS232 RxD
RS232 TxD
RS232 DTR
GND
RS232 DSR
RS232 RTS
RS232 CTS
RS232 RING
GND
(NC) No Connect
USB Detect
NC
USB – UDC +
NC
USB – UDC -
GND

How to find the pin-numbers?

All you need is a DVM with Resistance Measurement and a small copper wire (with un isolated ends). The rest is precise work. To get the correct pin i used my digicam to photograph the wire, zoomed into the picture on my display and counted if the wire is placed correct. Then with the DVM you can find the corresponding pin on the other side.