5+1 led vu-meter with AN6884
AN6884 is 5-dot led driver circuit with logarithmic scale (dB), who can be used in this configuration: I made a quick test montage: Also, I made AN6884 on test board movie: I want t...
Category: LED
LED bulb for solder gun
I use an old solder gun for made quickly some montages who is equipped with 6,3V incandescent bulb. So, Inadvertently, I broke the bulb. Because, I want to quick solve the problem, inspired by my...
3W 230V Watch lamp with LEDs (reverse engineering)
A few years ago, I buy with 0,8EUR an 230V watch lamp with 4 leds. I made reverse engineering for this lamp: I made few calculations: R2 Resistor is put for limit power-up current,...
Lantern with 3 leds (reverse engineering)
I buy a chinesse lantern with 3 leds who is powered by 2 AA bateries. If power directlly a white led at 2 AA bateries, led will lit very low or not lit, but...
P20F04D-12L display with HUB40A interface and 16×8 2R1G1B pixels (part 2)
original article (roumanian language) After I became familiar with P20F04D-12L display module using Arduino develelopment board, I decided to made a weather station (temperature & humidity). The first tests we presented in the previous article...
230V~ LED flasher
original article (roumanian language) In a old paper magazine named ELEKTOR I found a nice schematic Using Eagle PCB software I designed a version for made this schematic: On net, I found a movie with similar...
230V~ LED flasher (led pulsator alimentat de la reţea)
I recover an old article with a flasher led powered by main supply (230V~/50Hz) – english version ! Am recuperat un vechi articole cu un led pulsator alimentat de la reţea (230V~/50Hz).
Articole recuperate, din domeniul orgilor de lumini..
– Orga de lumini cu becuri – Miniorga de lumini IPRS – Miniorga de lumini cu… LED-uri (partea intai) – Miniorga de lumini cu… LED-uri (partea a doua)
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