About: Ibrar Ayyub

Some time ago I passed comment in here about converting an ESP-01 to 32Mb  (or 4MB).  And here it is in the flesh – a 32Mb ESP-01 – and also – at last – Sonoff Upgrades. Now, why would you want to do all of that? I would suggest only if you happen to have […]

New, more efficient LED series from company Kingbright were recently introduced to you in our article Small but powerful LED series KP- 2012, where we presented you new stock types – red series SR-J4. Meanwhile we also enhanced our stock offer with green LED series (525nm) LED – ZGK as well as with yellow LED […]

Despite the initial investment, solid state lighting (SSL) has proven to be a viable alternative over conventional technologies due to the combined savings in energy consumption and maintenance costs, as well as design flexibility. Furthermore, increased energy savings can be realized with active intelligence such as occupancy and ambient light sensors, as well as external […]

Linear Technology has introduced a voltage supply regulator chip that includes an interface to take care of charging, balancing and monitoring external supercaps (or batteries) for system power backup. Its wide 0.1 V to 5.5 V capacitor/battery voltage and 1.8 V to 5.25V system backup voltage ranges make it suitable for a wide range of […]

Arthur English’s group at Emory has developed a custom device that they have used for stimulating peripheral nerves optically in anesthetized mice using a standard optical fiber. The device is compact, rechargeable battery-operated, and controlled either manually or by computer using an analog input. Essentially, laser LED illumination is coupled to an optical fiber by […]

What was that?  A Whats-a-Maja-Thimagig? Yep – One of those!  This Instructable extends my Arduino Ethernet controller to control a set of up to 6 relays, but that’s not the neat bit.  The neat bit is that there is a web based state machine in the AtMega chip so that the relays will operate in […]

4 Channel RF remote built using PT2262 and PT2272-M4 IC from Princeton technology. PT2262 used as Encoder (Transmitter) and PT2272-M4 Decoder (Receiver) ICs are heart of the project. The receiver provides 4 channel Momentary outputs. All outputs are TTL level can be interface with other circuits or relay board. Transmitter works with 5V to 12V […]

This applications note discusses a low-cost circuit for I2C level translation. This circuit was developed for the Si701x, Si702x, and Si703x humidity sensors but will work in many applications. This circuit provides I2C level translation from a higher voltage supply, such as 5 V, to a lower voltage, supply such as 1.8 or 3.3 V. […]

I’ve been a bit busy the last couple of weeks but I’ve now finished my 22’nd Project A Week. Maybe I have to change the name to PAAW instead (Project Almost A Week) ^_^ TraId is a really low cost version of the Part Ninja. It’s made to only identify the pinout and type (NPN/PNP) […]

9-VDC-POWER-SUPPLY-G015 Tiny low current 9 VDC Regulated Power supply designed around bipolar transistor and zener diode. The circuit is known as series voltage regulator or emitter follower voltage regulator. The unregulated supply fed to input and the circuit regulate the voltage and provide constant 9V DC, 250mA. The zener diode provides the reference voltage to […]