![]() ![]() Relays: The older and simpler of these two devices, relays - more precisely called "electromechanical relays" - are very simple devices. They pull this off by using relays or triacs, devices that all of us are at least passingly familiar with.īut how do these very common control components work, exactly? And how is troubleshooting a relay different from troubleshooting a triac? That's what we'll look at today. from France.Whether a control board in an appliance is simple or sophisticated, there's one trick it has to pull off: switching high AC voltage using low control voltage. Phone-charger and its standard cables are fine. I get the same measure for polarised capacitors in both ways, but measures for very large capacity varies : ut61e=5.78mF and tc1=6.09mF. With the 5.6V-Zener, peak currents are about +/- 9% from 3.25mA to 3.78mA, and peak tensions are around 1%. The ut61e has two peak-measures : peak-min and peak-max. Of course device doesn't detect lm317 and lm337 variable tension regulators, but lm7805 fixed tension regulator is described as 2 diodes. Zener diodes are described as 2 diodes mounted head-to-tail. It's very funny to play with 2-colors leds with 2 pin or 3 pin. Displayed gain for bc516 and bc517 transistors is about 30k or 40k. ![]() Results are fine for PNP and NPN Darlington transistors. Can I test : BJT npn and pnp gain ? Even for Draligton transistors ? capacitance ? with its serial resistor ? Zener diode and led ? until 30Volt ? Triac and thyristor ? mosfet transistors ? Do you have any advice about this device? (or other ones) I post in this beginner forum because I don't want to change the device firmware Thank you a lot. Which one has one a more electrical robustness ? User manual explains that more than 4.5Volt input may destroy the device. Theses devices t7 and tc1 are on aliexpress and ebay for about 15-20eur (= usd17-22). I prefer devices powered by a rectangular 9V-6F22 battery, but I only find device with small lithium-ion battery. Hi everybody ! I want to test and sort transistors, Zener diodes and others components, i am looking for a solid case and an English display. ![]()
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